From 23e7f27ee4a74063d3a91bcf1a74defc63eec09a Mon Sep 17 00:00:00 2001
From: Divyansh Singh <divyanshanandsingh@gmail.com>
Date: Wed, 22 Mar 2023 02:22:43 +0530
Subject: [PATCH 01/11] fix: rephrase error when running from config

to avoid confusion, as the user might think the problem is with their config file
---
 borgmatic/commands/borgmatic.py | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/borgmatic/commands/borgmatic.py b/borgmatic/commands/borgmatic.py
index fe07981..fbea260 100644
--- a/borgmatic/commands/borgmatic.py
+++ b/borgmatic/commands/borgmatic.py
@@ -615,9 +615,7 @@ def collect_configuration_run_summary_logs(configs, arguments):
         error_logs = tuple(result for result in results if isinstance(result, logging.LogRecord))
 
         if error_logs:
-            yield from log_error_records(
-                '{}: Error running configuration file'.format(config_filename)
-            )
+            yield from log_error_records('{}: An error occurred'.format(config_filename))
             yield from error_logs
         else:
             yield logging.makeLogRecord(

From ca6fd6b0615092d3897a812a86124462b4a4e894 Mon Sep 17 00:00:00 2001
From: Dan Helfman <witten@torsion.org>
Date: Tue, 21 Mar 2023 14:25:20 -0700
Subject: [PATCH 02/11] Add confusing error message fix to NEWS (#623).

---
 NEWS | 1 +
 1 file changed, 1 insertion(+)

diff --git a/NEWS b/NEWS
index afbd5d4..0bb47e2 100644
--- a/NEWS
+++ b/NEWS
@@ -4,6 +4,7 @@
  * #576: Add support for "file://" paths within "repositories" option.
  * #618: Add support for BORG_FILES_CACHE_TTL environment variable via "borg_files_cache_ttl" option
    in borgmatic's storage configuration.
+ * #623: Fix confusing message when an error occurs running actions for a configuration file.
 
 1.7.9
  * #295: Add a SQLite database dump/restore hook.

From 09183464cde4aa9d82a271c3cb19ac7ccabca1a8 Mon Sep 17 00:00:00 2001
From: Divyansh Singh <divyanshanandsingh@gmail.com>
Date: Wed, 22 Mar 2023 09:41:39 +0530
Subject: [PATCH 03/11] fix: no error on database backups without source dirs

---
 borgmatic/borg/create.py   |  1 +
 borgmatic/execute.py       | 32 +++++++++++++++++++++++---------
 tests/unit/test_execute.py | 26 ++++++++++++++++++++++++++
 3 files changed, 50 insertions(+), 9 deletions(-)

diff --git a/borgmatic/borg/create.py b/borgmatic/borg/create.py
index 87a0fdd..f0169bf 100644
--- a/borgmatic/borg/create.py
+++ b/borgmatic/borg/create.py
@@ -291,6 +291,7 @@ def collect_special_file_paths(
         capture_stderr=True,
         working_directory=working_directory,
         extra_environment=borg_environment,
+        raise_on_exit_code_one=False,
     )
 
     paths = tuple(
diff --git a/borgmatic/execute.py b/borgmatic/execute.py
index d4b04bf..2daac55 100644
--- a/borgmatic/execute.py
+++ b/borgmatic/execute.py
@@ -213,7 +213,12 @@ def execute_command(
 
 
 def execute_command_and_capture_output(
-    full_command, capture_stderr=False, shell=False, extra_environment=None, working_directory=None,
+    full_command,
+    capture_stderr=False,
+    shell=False,
+    extra_environment=None,
+    working_directory=None,
+    raise_on_exit_code_one=True,
 ):
     '''
     Execute the given command (a sequence of command/argument strings), capturing and returning its
@@ -221,20 +226,29 @@ def execute_command_and_capture_output(
     stdout. If shell is True, execute the command within a shell. If an extra environment dict is
     given, then use it to augment the current environment, and pass the result into the command. If
     a working directory is given, use that as the present working directory when running the command.
+    If raise on exit code one is False, then treat exit code 1 as a warning instead of an error.
 
-    Raise subprocesses.CalledProcessError if an error occurs while running the command.
+    Raise subprocesses.CalledProcessError if an error occurs while running the command, or if the
+    command exits with a non-zero exit code and raise on exit code one is True.
     '''
     log_command(full_command)
     environment = {**os.environ, **extra_environment} if extra_environment else None
     command = ' '.join(full_command) if shell else full_command
 
-    output = subprocess.check_output(
-        command,
-        stderr=subprocess.STDOUT if capture_stderr else None,
-        shell=shell,
-        env=environment,
-        cwd=working_directory,
-    )
+    try:
+        output = subprocess.check_output(
+            command,
+            stderr=subprocess.STDOUT if capture_stderr else None,
+            shell=shell,
+            env=environment,
+            cwd=working_directory,
+        )
+        logger.warning('Command output: {}'.format(output))
+    except subprocess.CalledProcessError as e:
+        if raise_on_exit_code_one or e.returncode != 1:
+            raise
+        output = e.output
+        logger.warning('Command output: {}'.format(output))
 
     return output.decode() if output is not None else None
 
diff --git a/tests/unit/test_execute.py b/tests/unit/test_execute.py
index 0441e9d..29a80cb 100644
--- a/tests/unit/test_execute.py
+++ b/tests/unit/test_execute.py
@@ -239,6 +239,32 @@ def test_execute_command_and_capture_output_with_capture_stderr_returns_stderr()
     assert output == expected_output
 
 
+def test_execute_command_and_capture_output_returns_output_with_raise_on_exit_code_one_false():
+    full_command = ['foo', 'bar']
+    expected_output = '[]'
+    err_output = b'[]'
+    flexmock(module.os, environ={'a': 'b'})
+    flexmock(module.subprocess).should_receive('check_output').with_args(
+        full_command, stderr=None, shell=False, env=None, cwd=None
+    ).and_raise(subprocess.CalledProcessError(1, full_command, err_output)).once()
+
+    output = module.execute_command_and_capture_output(full_command, raise_on_exit_code_one=False)
+
+    assert output == expected_output
+
+
+def test_execute_command_and_capture_output_returns_output_with_raise_on_exit_code_one_false_and_exit_code_not_one():
+    full_command = ['foo', 'bar']
+    expected_output = '[]'
+    flexmock(module.os, environ={'a': 'b'})
+    flexmock(module.subprocess).should_receive('check_output').with_args(
+        full_command, stderr=None, shell=False, env=None, cwd=None
+    ).and_raise(subprocess.CalledProcessError(2, full_command, expected_output)).once()
+
+    with pytest.raises(subprocess.CalledProcessError):
+        module.execute_command_and_capture_output(full_command, raise_on_exit_code_one=False)
+
+
 def test_execute_command_and_capture_output_returns_output_with_shell():
     full_command = ['foo', 'bar']
     expected_output = '[]'

From bd235f042602a9a29cc5f81880e3b36c21c0fcc3 Mon Sep 17 00:00:00 2001
From: Divyansh Singh <divyanshanandsingh@gmail.com>
Date: Wed, 22 Mar 2023 16:23:53 +0530
Subject: [PATCH 04/11] use exit_code_indicates_error and modify it to accept a
 command

---
 borgmatic/borg/create.py          |  2 +-
 borgmatic/execute.py              | 20 +++++--------
 tests/integration/test_execute.py |  8 ++---
 tests/unit/test_execute.py        | 50 ++++++++++++++++---------------
 4 files changed, 38 insertions(+), 42 deletions(-)

diff --git a/borgmatic/borg/create.py b/borgmatic/borg/create.py
index f0169bf..acc144b 100644
--- a/borgmatic/borg/create.py
+++ b/borgmatic/borg/create.py
@@ -291,7 +291,7 @@ def collect_special_file_paths(
         capture_stderr=True,
         working_directory=working_directory,
         extra_environment=borg_environment,
-        raise_on_exit_code_one=False,
+        treat_exit_code_warning_as_error=False,
     )
 
     paths = tuple(
diff --git a/borgmatic/execute.py b/borgmatic/execute.py
index 2daac55..50a0587 100644
--- a/borgmatic/execute.py
+++ b/borgmatic/execute.py
@@ -11,7 +11,7 @@ ERROR_OUTPUT_MAX_LINE_COUNT = 25
 BORG_ERROR_EXIT_CODE = 2
 
 
-def exit_code_indicates_error(process, exit_code, borg_local_path=None):
+def exit_code_indicates_error(command, exit_code, borg_local_path=None):
     '''
     Return True if the given exit code from running a command corresponds to an error. If a Borg
     local path is given and matches the process' command, then treat exit code 1 as a warning
@@ -20,8 +20,6 @@ def exit_code_indicates_error(process, exit_code, borg_local_path=None):
     if exit_code is None:
         return False
 
-    command = process.args.split(' ') if isinstance(process.args, str) else process.args
-
     if borg_local_path and command[0] == borg_local_path:
         return bool(exit_code < 0 or exit_code >= BORG_ERROR_EXIT_CODE)
 
@@ -121,8 +119,9 @@ def log_outputs(processes, exclude_stdouts, output_log_level, borg_local_path):
             if exit_code is None:
                 still_running = True
 
+            command = process.args.split(' ') if isinstance(process.args, str) else process.args
             # If any process errors, then raise accordingly.
-            if exit_code_indicates_error(process, exit_code, borg_local_path):
+            if exit_code_indicates_error(command, exit_code, borg_local_path):
                 # If an error occurs, include its output in the raised exception so that we don't
                 # inadvertently hide error output.
                 output_buffer = output_buffer_for_process(process, exclude_stdouts)
@@ -213,12 +212,7 @@ def execute_command(
 
 
 def execute_command_and_capture_output(
-    full_command,
-    capture_stderr=False,
-    shell=False,
-    extra_environment=None,
-    working_directory=None,
-    raise_on_exit_code_one=True,
+    full_command, capture_stderr=False, shell=False, extra_environment=None, working_directory=None,
 ):
     '''
     Execute the given command (a sequence of command/argument strings), capturing and returning its
@@ -244,10 +238,10 @@ def execute_command_and_capture_output(
             cwd=working_directory,
         )
         logger.warning('Command output: {}'.format(output))
-    except subprocess.CalledProcessError as e:
-        if raise_on_exit_code_one or e.returncode != 1:
+    except subprocess.CalledProcessError as error:
+        if exit_code_indicates_error(error.returncode):
             raise
-        output = e.output
+        output = error.output
         logger.warning('Command output: {}'.format(output))
 
     return output.decode() if output is not None else None
diff --git a/tests/integration/test_execute.py b/tests/integration/test_execute.py
index bbdb977..2a9b61d 100644
--- a/tests/integration/test_execute.py
+++ b/tests/integration/test_execute.py
@@ -138,10 +138,10 @@ def test_log_outputs_kills_other_processes_when_one_errors():
 
     process = subprocess.Popen(['grep'], stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
     flexmock(module).should_receive('exit_code_indicates_error').with_args(
-        process, None, 'borg'
+        ['grep'], None, 'borg'
     ).and_return(False)
     flexmock(module).should_receive('exit_code_indicates_error').with_args(
-        process, 2, 'borg'
+        ['grep'], 2, 'borg'
     ).and_return(True)
     other_process = subprocess.Popen(
         ['sleep', '2'], stdout=subprocess.PIPE, stderr=subprocess.STDOUT
@@ -245,10 +245,10 @@ def test_log_outputs_truncates_long_error_output():
 
     process = subprocess.Popen(['grep'], stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
     flexmock(module).should_receive('exit_code_indicates_error').with_args(
-        process, None, 'borg'
+        ['grep'], None, 'borg'
     ).and_return(False)
     flexmock(module).should_receive('exit_code_indicates_error').with_args(
-        process, 2, 'borg'
+        ['grep'], 2, 'borg'
     ).and_return(True)
     flexmock(module).should_receive('output_buffer_for_process').and_return(process.stdout)
 
diff --git a/tests/unit/test_execute.py b/tests/unit/test_execute.py
index 29a80cb..d6c51c0 100644
--- a/tests/unit/test_execute.py
+++ b/tests/unit/test_execute.py
@@ -7,32 +7,32 @@ from borgmatic import execute as module
 
 
 @pytest.mark.parametrize(
-    'process,exit_code,borg_local_path,expected_result',
+    'command,exit_code,borg_local_path,expected_result',
     (
-        (flexmock(args=['grep']), 2, None, True),
-        (flexmock(args=['grep']), 2, 'borg', True),
-        (flexmock(args=['borg']), 2, 'borg', True),
-        (flexmock(args=['borg1']), 2, 'borg1', True),
-        (flexmock(args=['grep']), 1, None, True),
-        (flexmock(args=['grep']), 1, 'borg', True),
-        (flexmock(args=['borg']), 1, 'borg', False),
-        (flexmock(args=['borg1']), 1, 'borg1', False),
-        (flexmock(args=['grep']), 0, None, False),
-        (flexmock(args=['grep']), 0, 'borg', False),
-        (flexmock(args=['borg']), 0, 'borg', False),
-        (flexmock(args=['borg1']), 0, 'borg1', False),
+        (['grep'], 2, None, True),
+        (['grep'], 2, 'borg', True),
+        (['borg'], 2, 'borg', True),
+        (['borg1'], 2, 'borg1', True),
+        (['grep'], 1, None, True),
+        (['grep'], 1, 'borg', True),
+        (['borg'], 1, 'borg', False),
+        (['borg1'], 1, 'borg1', False),
+        (['grep'], 0, None, False),
+        (['grep'], 0, 'borg', False),
+        (['borg'], 0, 'borg', False),
+        (['borg1'], 0, 'borg1', False),
         # -9 exit code occurs when child process get SIGKILLed.
-        (flexmock(args=['grep']), -9, None, True),
-        (flexmock(args=['grep']), -9, 'borg', True),
-        (flexmock(args=['borg']), -9, 'borg', True),
-        (flexmock(args=['borg1']), -9, 'borg1', True),
-        (flexmock(args=['borg']), None, None, False),
+        (['grep'], -9, None, True),
+        (['grep'], -9, 'borg', True),
+        (['borg'], -9, 'borg', True),
+        (['borg1'], -9, 'borg1', True),
+        (['borg'], None, None, False),
     ),
 )
 def test_exit_code_indicates_error_respects_exit_code_and_borg_local_path(
-    process, exit_code, borg_local_path, expected_result
+    command, exit_code, borg_local_path, expected_result
 ):
-    assert module.exit_code_indicates_error(process, exit_code, borg_local_path) is expected_result
+    assert module.exit_code_indicates_error(command, exit_code, borg_local_path) is expected_result
 
 
 def test_command_for_process_converts_sequence_command_to_string():
@@ -239,7 +239,7 @@ def test_execute_command_and_capture_output_with_capture_stderr_returns_stderr()
     assert output == expected_output
 
 
-def test_execute_command_and_capture_output_returns_output_with_raise_on_exit_code_one_false():
+def test_execute_command_and_capture_output_returns_output_when_error_code_is_one():
     full_command = ['foo', 'bar']
     expected_output = '[]'
     err_output = b'[]'
@@ -247,22 +247,24 @@ def test_execute_command_and_capture_output_returns_output_with_raise_on_exit_co
     flexmock(module.subprocess).should_receive('check_output').with_args(
         full_command, stderr=None, shell=False, env=None, cwd=None
     ).and_raise(subprocess.CalledProcessError(1, full_command, err_output)).once()
+    flexmock(module).should_receive('exit_code_indicates_error').and_return(False).once()
 
-    output = module.execute_command_and_capture_output(full_command, raise_on_exit_code_one=False)
+    output = module.execute_command_and_capture_output(full_command)
 
     assert output == expected_output
 
 
-def test_execute_command_and_capture_output_returns_output_with_raise_on_exit_code_one_false_and_exit_code_not_one():
+def test_execute_command_and_capture_output_returns_output_when_error_code_not_one():
     full_command = ['foo', 'bar']
     expected_output = '[]'
     flexmock(module.os, environ={'a': 'b'})
     flexmock(module.subprocess).should_receive('check_output').with_args(
         full_command, stderr=None, shell=False, env=None, cwd=None
     ).and_raise(subprocess.CalledProcessError(2, full_command, expected_output)).once()
+    flexmock(module).should_receive('exit_code_indicates_error').and_return(True).once()
 
     with pytest.raises(subprocess.CalledProcessError):
-        module.execute_command_and_capture_output(full_command, raise_on_exit_code_one=False)
+        module.execute_command_and_capture_output(full_command)
 
 
 def test_execute_command_and_capture_output_returns_output_with_shell():

From 3b5ede8044fa93bd2f7bab40f1a6138af127d27b Mon Sep 17 00:00:00 2001
From: Divyansh Singh <divyanshanandsingh@gmail.com>
Date: Wed, 22 Mar 2023 23:11:44 +0530
Subject: [PATCH 05/11] remove extra parameter from function call

---
 borgmatic/borg/create.py | 1 -
 1 file changed, 1 deletion(-)

diff --git a/borgmatic/borg/create.py b/borgmatic/borg/create.py
index acc144b..87a0fdd 100644
--- a/borgmatic/borg/create.py
+++ b/borgmatic/borg/create.py
@@ -291,7 +291,6 @@ def collect_special_file_paths(
         capture_stderr=True,
         working_directory=working_directory,
         extra_environment=borg_environment,
-        treat_exit_code_warning_as_error=False,
     )
 
     paths = tuple(

From 1e3a3bf1e7b73fa34e73e6905d6b17c27bb1bd5f Mon Sep 17 00:00:00 2001
From: Divyansh Singh <divyanshanandsingh@gmail.com>
Date: Thu, 23 Mar 2023 01:18:06 +0530
Subject: [PATCH 06/11] review

---
 borgmatic/execute.py       | 6 ++----
 tests/unit/test_execute.py | 2 +-
 2 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/borgmatic/execute.py b/borgmatic/execute.py
index 50a0587..a01e1a1 100644
--- a/borgmatic/execute.py
+++ b/borgmatic/execute.py
@@ -220,10 +220,8 @@ def execute_command_and_capture_output(
     stdout. If shell is True, execute the command within a shell. If an extra environment dict is
     given, then use it to augment the current environment, and pass the result into the command. If
     a working directory is given, use that as the present working directory when running the command.
-    If raise on exit code one is False, then treat exit code 1 as a warning instead of an error.
 
-    Raise subprocesses.CalledProcessError if an error occurs while running the command, or if the
-    command exits with a non-zero exit code and raise on exit code one is True.
+    Raise subprocesses.CalledProcessError if an error occurs while running the command.
     '''
     log_command(full_command)
     environment = {**os.environ, **extra_environment} if extra_environment else None
@@ -239,7 +237,7 @@ def execute_command_and_capture_output(
         )
         logger.warning('Command output: {}'.format(output))
     except subprocess.CalledProcessError as error:
-        if exit_code_indicates_error(error.returncode):
+        if exit_code_indicates_error(command, error.returncode):
             raise
         output = error.output
         logger.warning('Command output: {}'.format(output))
diff --git a/tests/unit/test_execute.py b/tests/unit/test_execute.py
index d6c51c0..3226a5a 100644
--- a/tests/unit/test_execute.py
+++ b/tests/unit/test_execute.py
@@ -254,7 +254,7 @@ def test_execute_command_and_capture_output_returns_output_when_error_code_is_on
     assert output == expected_output
 
 
-def test_execute_command_and_capture_output_returns_output_when_error_code_not_one():
+def test_execute_command_and_capture_output_raises_when_command_errors():
     full_command = ['foo', 'bar']
     expected_output = '[]'
     flexmock(module.os, environ={'a': 'b'})

From 0a72c67c6c2704ea5e8dfa683facd1e8d423e138 Mon Sep 17 00:00:00 2001
From: Dan Helfman <witten@torsion.org>
Date: Wed, 22 Mar 2023 13:02:22 -0700
Subject: [PATCH 07/11] Add missing source directory error fix to NEWS (#655).

---
 NEWS                       | 1 +
 borgmatic/borg/rlist.py    | 2 +-
 tests/unit/test_execute.py | 2 +-
 3 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/NEWS b/NEWS
index 0bb47e2..bd5687c 100644
--- a/NEWS
+++ b/NEWS
@@ -5,6 +5,7 @@
  * #618: Add support for BORG_FILES_CACHE_TTL environment variable via "borg_files_cache_ttl" option
    in borgmatic's storage configuration.
  * #623: Fix confusing message when an error occurs running actions for a configuration file.
+ * #655: Fix error when databases are configured and a source directory doesn't exist.
 
 1.7.9
  * #295: Add a SQLite database dump/restore hook.
diff --git a/borgmatic/borg/rlist.py b/borgmatic/borg/rlist.py
index 2a465fb..33404f9 100644
--- a/borgmatic/borg/rlist.py
+++ b/borgmatic/borg/rlist.py
@@ -117,7 +117,7 @@ def list_repository(
     )
 
     if rlist_arguments.json:
-        return execute_command_and_capture_output(main_command, extra_environment=borg_environment,)
+        return execute_command_and_capture_output(main_command, extra_environment=borg_environment)
     else:
         execute_command(
             main_command,
diff --git a/tests/unit/test_execute.py b/tests/unit/test_execute.py
index 3226a5a..badcb8f 100644
--- a/tests/unit/test_execute.py
+++ b/tests/unit/test_execute.py
@@ -239,7 +239,7 @@ def test_execute_command_and_capture_output_with_capture_stderr_returns_stderr()
     assert output == expected_output
 
 
-def test_execute_command_and_capture_output_returns_output_when_error_code_is_one():
+def test_execute_command_and_capture_output_returns_output_when_process_error_is_not_considered_an_error():
     full_command = ['foo', 'bar']
     expected_output = '[]'
     err_output = b'[]'

From 66d2f49f18c4a39ccb03955b02ef82d2d09d0007 Mon Sep 17 00:00:00 2001
From: Divyansh Singh <divyanshanandsingh@gmail.com>
Date: Thu, 23 Mar 2023 14:45:23 +0530
Subject: [PATCH 08/11] docs: copy to clipboard support

---
 .eleventy.js                    | 3 +++
 docs/Dockerfile                 | 1 +
 docs/_includes/layouts/base.njk | 4 +++-
 3 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/.eleventy.js b/.eleventy.js
index bde54af..30057a4 100644
--- a/.eleventy.js
+++ b/.eleventy.js
@@ -1,4 +1,5 @@
 const pluginSyntaxHighlight = require("@11ty/eleventy-plugin-syntaxhighlight");
+const codeClipboard = require("eleventy-plugin-code-clipboard");
 const inclusiveLangPlugin = require("@11ty/eleventy-plugin-inclusive-language");
 const navigationPlugin = require("@11ty/eleventy-navigation");
 
@@ -6,6 +7,7 @@ module.exports = function(eleventyConfig) {
     eleventyConfig.addPlugin(pluginSyntaxHighlight);
     eleventyConfig.addPlugin(inclusiveLangPlugin);
     eleventyConfig.addPlugin(navigationPlugin);
+    eleventyConfig.addPlugin(codeClipboard);
 
     let markdownIt = require("markdown-it");
     let markdownItAnchor = require("markdown-it-anchor");
@@ -31,6 +33,7 @@ module.exports = function(eleventyConfig) {
         markdownIt(markdownItOptions)
             .use(markdownItAnchor, markdownItAnchorOptions)
             .use(markdownItReplaceLink)
+            .use(codeClipboard.markdownItCopyButton)
     );
 
     eleventyConfig.addPassthroughCopy({"docs/static": "static"});
diff --git a/docs/Dockerfile b/docs/Dockerfile
index 8800cc1..dcda44f 100644
--- a/docs/Dockerfile
+++ b/docs/Dockerfile
@@ -18,6 +18,7 @@ RUN npm install @11ty/eleventy \
     @11ty/eleventy-plugin-syntaxhighlight \
     @11ty/eleventy-plugin-inclusive-language \
     @11ty/eleventy-navigation \
+    eleventy-plugin-code-clipboard \
     markdown-it \
     markdown-it-anchor \
     markdown-it-replace-link
diff --git a/docs/_includes/layouts/base.njk b/docs/_includes/layouts/base.njk
index 361967c..61ae7a4 100644
--- a/docs/_includes/layouts/base.njk
+++ b/docs/_includes/layouts/base.njk
@@ -18,10 +18,12 @@
 {% if feedTitle and feedUrl %}
 		<link rel="alternate" href="{{ feedUrl }}" title="{{ feedTitle }}" type="application/atom+xml">
 {% endif %}
+<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@mdi/font@6.5.95/css/materialdesignicons.min.css" crossorigin="anonymous" referrerpolicy="no-referrer" />
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/Primer/19.1.1/tooltips.min.css" crossorigin="anonymous" referrerpolicy="no-referrer" />
 	</head>
 	<body>
 
 		{{ content | safe }}
-
+		{% initClipboardJS %}
 	</body>
 </html>

From a01dc62468e01e25f2e07f2e587a1b8266a3ac25 Mon Sep 17 00:00:00 2001
From: Divyansh Singh <divyanshanandsingh@gmail.com>
Date: Fri, 24 Mar 2023 01:23:40 +0530
Subject: [PATCH 09/11] fix: remove extra links from docs css

---
 docs/_includes/index.css        | 15 +++++++++++++++
 docs/_includes/layouts/base.njk |  2 --
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/docs/_includes/index.css b/docs/_includes/index.css
index ca1c2df..9d8c955 100644
--- a/docs/_includes/index.css
+++ b/docs/_includes/index.css
@@ -533,3 +533,18 @@ main .elv-toc + h1 .direct-link {
 .header-anchor:hover::after {
     content: " 🔗";
 }
+
+.mdi {
+    display: inline-block;
+    width: 1em;
+    height: 1em;
+    background-color: currentColor;
+    -webkit-mask: no-repeat center / 100%;
+    mask: no-repeat center / 100%;
+    -webkit-mask-image: var(--svg);
+    mask-image: var(--svg);
+}
+
+.mdi.mdi-content-copy {
+    --svg: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' width='24' height='24'%3E%3Cpath fill='black' d='M19 21H8V7h11m0-2H8a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h11a2 2 0 0 0 2-2V7a2 2 0 0 0-2-2m-3-4H4a2 2 0 0 0-2 2v14h2V3h12V1Z'/%3E%3C/svg%3E");
+}
\ No newline at end of file
diff --git a/docs/_includes/layouts/base.njk b/docs/_includes/layouts/base.njk
index 61ae7a4..be588e9 100644
--- a/docs/_includes/layouts/base.njk
+++ b/docs/_includes/layouts/base.njk
@@ -18,8 +18,6 @@
 {% if feedTitle and feedUrl %}
 		<link rel="alternate" href="{{ feedUrl }}" title="{{ feedTitle }}" type="application/atom+xml">
 {% endif %}
-<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@mdi/font@6.5.95/css/materialdesignicons.min.css" crossorigin="anonymous" referrerpolicy="no-referrer" />
-<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/Primer/19.1.1/tooltips.min.css" crossorigin="anonymous" referrerpolicy="no-referrer" />
 	</head>
 	<body>
 

From 08afad5d819468d315f2400f9c6affd4de1620be Mon Sep 17 00:00:00 2001
From: Divyansh Singh <divyanshanandsingh@gmail.com>
Date: Fri, 24 Mar 2023 01:25:15 +0530
Subject: [PATCH 10/11] end with newline

---
 docs/_includes/index.css | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/_includes/index.css b/docs/_includes/index.css
index 9d8c955..f1d4c57 100644
--- a/docs/_includes/index.css
+++ b/docs/_includes/index.css
@@ -547,4 +547,4 @@ main .elv-toc + h1 .direct-link {
 
 .mdi.mdi-content-copy {
     --svg: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' width='24' height='24'%3E%3Cpath fill='black' d='M19 21H8V7h11m0-2H8a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h11a2 2 0 0 0 2-2V7a2 2 0 0 0-2-2m-3-4H4a2 2 0 0 0-2 2v14h2V3h12V1Z'/%3E%3C/svg%3E");
-}
\ No newline at end of file
+}

From f42890430c59a40a17d9a68a193d6a09674770cb Mon Sep 17 00:00:00 2001
From: Dan Helfman <witten@torsion.org>
Date: Thu, 23 Mar 2023 23:11:14 -0700
Subject: [PATCH 11/11] Add code style plugins to enforce use of Python
 f-strings and prevent single-letter variables.

---
 NEWS                                     |  2 ++
 borgmatic/actions/borg.py                |  2 +-
 borgmatic/actions/check.py               |  2 +-
 borgmatic/actions/compact.py             |  4 +--
 borgmatic/actions/create.py              |  2 +-
 borgmatic/actions/export_tar.py          |  4 +--
 borgmatic/actions/extract.py             |  2 +-
 borgmatic/actions/mount.py               |  4 +--
 borgmatic/actions/prune.py               |  2 +-
 borgmatic/actions/rcreate.py             |  2 +-
 borgmatic/actions/restore.py             |  5 ++--
 borgmatic/actions/rinfo.py               |  3 +-
 borgmatic/actions/rlist.py               |  3 +-
 borgmatic/borg/check.py                  |  4 +--
 borgmatic/borg/create.py                 |  2 +-
 borgmatic/borg/export_tar.py             |  2 +-
 borgmatic/borg/flags.py                  |  2 +-
 borgmatic/borg/list.py                   |  2 +-
 borgmatic/borg/prune.py                  |  2 +-
 borgmatic/borg/rlist.py                  |  2 +-
 borgmatic/commands/arguments.py          |  4 +--
 borgmatic/commands/borgmatic.py          | 38 ++++++++++--------------
 borgmatic/commands/completion.py         |  4 +--
 borgmatic/commands/convert_config.py     | 22 +++++---------
 borgmatic/commands/generate_config.py    | 14 +++------
 borgmatic/commands/validate_config.py    | 10 ++-----
 borgmatic/config/collect.py              |  4 +--
 borgmatic/config/environment.py          |  5 +++-
 borgmatic/config/generate.py             | 10 +++----
 borgmatic/config/legacy.py               | 16 ++++------
 borgmatic/config/validate.py             | 23 +++++++-------
 borgmatic/execute.py                     |  8 ++---
 borgmatic/hooks/command.py               | 18 ++++-------
 borgmatic/hooks/cronhub.py               |  8 ++---
 borgmatic/hooks/cronitor.py              |  8 ++---
 borgmatic/hooks/dispatch.py              |  4 +--
 borgmatic/hooks/dump.py                  |  8 ++---
 borgmatic/hooks/healthchecks.py          | 10 +++----
 borgmatic/hooks/mongodb.py               | 10 ++-----
 borgmatic/hooks/mysql.py                 |  6 ++--
 borgmatic/hooks/pagerduty.py             | 10 +++----
 borgmatic/hooks/postgresql.py            |  6 ++--
 borgmatic/hooks/sqlite.py                |  2 +-
 borgmatic/logger.py                      |  2 +-
 test_requirements.txt                    |  2 ++
 tests/end-to-end/test_borgmatic.py       | 20 +++++--------
 tests/end-to-end/test_database.py        |  2 +-
 tests/end-to-end/test_override.py        |  8 ++---
 tests/end-to-end/test_validate_config.py | 16 +++-------
 tests/integration/config/test_legacy.py  |  2 +-
 tests/unit/borg/test_create.py           | 20 ++++++-------
 tests/unit/borg/test_prune.py            | 22 ++++++++++----
 tests/unit/config/test_environment.py    | 28 ++++++++---------
 tests/unit/config/test_validate.py       |  8 ++---
 tests/unit/hooks/test_command.py         | 17 ++++-------
 tests/unit/hooks/test_healthchecks.py    |  4 +--
 tests/unit/hooks/test_mongodb.py         |  2 +-
 tests/unit/hooks/test_postgresql.py      |  2 +-
 58 files changed, 195 insertions(+), 261 deletions(-)

diff --git a/NEWS b/NEWS
index bd5687c..bc5f431 100644
--- a/NEWS
+++ b/NEWS
@@ -6,6 +6,8 @@
    in borgmatic's storage configuration.
  * #623: Fix confusing message when an error occurs running actions for a configuration file.
  * #655: Fix error when databases are configured and a source directory doesn't exist.
+ * Add code style plugins to enforce use of Python f-strings and prevent single-letter variables.
+   To join in the pedantry, refresh your test environment with "tox --recreate".
 
 1.7.9
  * #295: Add a SQLite database dump/restore hook.
diff --git a/borgmatic/actions/borg.py b/borgmatic/actions/borg.py
index a50dd28..ee94f1d 100644
--- a/borgmatic/actions/borg.py
+++ b/borgmatic/actions/borg.py
@@ -16,7 +16,7 @@ def run_borg(
     if borg_arguments.repository is None or borgmatic.config.validate.repositories_match(
         repository, borg_arguments.repository
     ):
-        logger.info('{}: Running arbitrary Borg command'.format(repository))
+        logger.info(f'{repository}: Running arbitrary Borg command')
         archive_name = borgmatic.borg.rlist.resolve_archive_name(
             repository,
             borg_arguments.archive,
diff --git a/borgmatic/actions/check.py b/borgmatic/actions/check.py
index f357239..cdee9ed 100644
--- a/borgmatic/actions/check.py
+++ b/borgmatic/actions/check.py
@@ -37,7 +37,7 @@ def run_check(
         global_arguments.dry_run,
         **hook_context,
     )
-    logger.info('{}: Running consistency checks'.format(repository))
+    logger.info(f'{repository}: Running consistency checks')
     borgmatic.borg.check.check_archives(
         repository,
         location,
diff --git a/borgmatic/actions/compact.py b/borgmatic/actions/compact.py
index 7a25b82..a0efa3a 100644
--- a/borgmatic/actions/compact.py
+++ b/borgmatic/actions/compact.py
@@ -39,7 +39,7 @@ def run_compact(
         **hook_context,
     )
     if borgmatic.borg.feature.available(borgmatic.borg.feature.Feature.COMPACT, local_borg_version):
-        logger.info('{}: Compacting segments{}'.format(repository, dry_run_label))
+        logger.info(f'{repository}: Compacting segments{dry_run_label}')
         borgmatic.borg.compact.compact_segments(
             global_arguments.dry_run,
             repository,
@@ -52,7 +52,7 @@ def run_compact(
             threshold=compact_arguments.threshold,
         )
     else:  # pragma: nocover
-        logger.info('{}: Skipping compact (only available/needed in Borg 1.2+)'.format(repository))
+        logger.info(f'{repository}: Skipping compact (only available/needed in Borg 1.2+)')
     borgmatic.hooks.command.execute_hook(
         hooks.get('after_compact'),
         hooks.get('umask'),
diff --git a/borgmatic/actions/create.py b/borgmatic/actions/create.py
index 96a4852..ac2617d 100644
--- a/borgmatic/actions/create.py
+++ b/borgmatic/actions/create.py
@@ -42,7 +42,7 @@ def run_create(
         global_arguments.dry_run,
         **hook_context,
     )
-    logger.info('{}: Creating archive{}'.format(repository, dry_run_label))
+    logger.info(f'{repository}: Creating archive{dry_run_label}')
     borgmatic.hooks.dispatch.call_hooks_even_if_unconfigured(
         'remove_database_dumps',
         hooks,
diff --git a/borgmatic/actions/export_tar.py b/borgmatic/actions/export_tar.py
index ae34920..b5b6089 100644
--- a/borgmatic/actions/export_tar.py
+++ b/borgmatic/actions/export_tar.py
@@ -22,9 +22,7 @@ def run_export_tar(
     if export_tar_arguments.repository is None or borgmatic.config.validate.repositories_match(
         repository, export_tar_arguments.repository
     ):
-        logger.info(
-            '{}: Exporting archive {} as tar file'.format(repository, export_tar_arguments.archive)
-        )
+        logger.info(f'{repository}: Exporting archive {export_tar_arguments.archive} as tar file')
         borgmatic.borg.export_tar.export_tar_archive(
             global_arguments.dry_run,
             repository,
diff --git a/borgmatic/actions/extract.py b/borgmatic/actions/extract.py
index a3d89a5..6af9caa 100644
--- a/borgmatic/actions/extract.py
+++ b/borgmatic/actions/extract.py
@@ -35,7 +35,7 @@ def run_extract(
     if extract_arguments.repository is None or borgmatic.config.validate.repositories_match(
         repository, extract_arguments.repository
     ):
-        logger.info('{}: Extracting archive {}'.format(repository, extract_arguments.archive))
+        logger.info(f'{repository}: Extracting archive {extract_arguments.archive}')
         borgmatic.borg.extract.extract_archive(
             global_arguments.dry_run,
             repository,
diff --git a/borgmatic/actions/mount.py b/borgmatic/actions/mount.py
index e2703a5..262e7d9 100644
--- a/borgmatic/actions/mount.py
+++ b/borgmatic/actions/mount.py
@@ -17,9 +17,9 @@ def run_mount(
         repository, mount_arguments.repository
     ):
         if mount_arguments.archive:
-            logger.info('{}: Mounting archive {}'.format(repository, mount_arguments.archive))
+            logger.info(f'{repository}: Mounting archive {mount_arguments.archive}')
         else:  # pragma: nocover
-            logger.info('{}: Mounting repository'.format(repository))
+            logger.info(f'{repository}: Mounting repository')
 
         borgmatic.borg.mount.mount_archive(
             repository,
diff --git a/borgmatic/actions/prune.py b/borgmatic/actions/prune.py
index ca098ce..76a42a9 100644
--- a/borgmatic/actions/prune.py
+++ b/borgmatic/actions/prune.py
@@ -37,7 +37,7 @@ def run_prune(
         global_arguments.dry_run,
         **hook_context,
     )
-    logger.info('{}: Pruning archives{}'.format(repository, dry_run_label))
+    logger.info(f'{repository}: Pruning archives{dry_run_label}')
     borgmatic.borg.prune.prune_archives(
         global_arguments.dry_run,
         repository,
diff --git a/borgmatic/actions/rcreate.py b/borgmatic/actions/rcreate.py
index 0052b4b..59b147d 100644
--- a/borgmatic/actions/rcreate.py
+++ b/borgmatic/actions/rcreate.py
@@ -23,7 +23,7 @@ def run_rcreate(
     ):
         return
 
-    logger.info('{}: Creating repository'.format(repository))
+    logger.info(f'{repository}: Creating repository')
     borgmatic.borg.rcreate.create_repository(
         global_arguments.dry_run,
         repository,
diff --git a/borgmatic/actions/restore.py b/borgmatic/actions/restore.py
index 7a05809..50c3973 100644
--- a/borgmatic/actions/restore.py
+++ b/borgmatic/actions/restore.py
@@ -255,9 +255,8 @@ def run_restore(
     ):
         return
 
-    logger.info(
-        '{}: Restoring databases from archive {}'.format(repository, restore_arguments.archive)
-    )
+    logger.info(f'{repository}: Restoring databases from archive {restore_arguments.archive}')
+
     borgmatic.hooks.dispatch.call_hooks_even_if_unconfigured(
         'remove_database_dumps',
         hooks,
diff --git a/borgmatic/actions/rinfo.py b/borgmatic/actions/rinfo.py
index 611d1bc..e7132c0 100644
--- a/borgmatic/actions/rinfo.py
+++ b/borgmatic/actions/rinfo.py
@@ -19,7 +19,8 @@ def run_rinfo(
         repository, rinfo_arguments.repository
     ):
         if not rinfo_arguments.json:  # pragma: nocover
-            logger.answer('{}: Displaying repository summary information'.format(repository))
+            logger.answer(f'{repository}: Displaying repository summary information')
+
         json_output = borgmatic.borg.rinfo.display_repository_info(
             repository,
             storage,
diff --git a/borgmatic/actions/rlist.py b/borgmatic/actions/rlist.py
index 72d5206..aa2032b 100644
--- a/borgmatic/actions/rlist.py
+++ b/borgmatic/actions/rlist.py
@@ -19,7 +19,8 @@ def run_rlist(
         repository, rlist_arguments.repository
     ):
         if not rlist_arguments.json:  # pragma: nocover
-            logger.answer('{}: Listing repository'.format(repository))
+            logger.answer(f'{repository}: Listing repository')
+
         json_output = borgmatic.borg.rlist.list_repository(
             repository,
             storage,
diff --git a/borgmatic/borg/check.py b/borgmatic/borg/check.py
index d9beaa6..2914d83 100644
--- a/borgmatic/borg/check.py
+++ b/borgmatic/borg/check.py
@@ -12,7 +12,7 @@ DEFAULT_CHECKS = (
     {'name': 'repository', 'frequency': '1 month'},
     {'name': 'archives', 'frequency': '1 month'},
 )
-DEFAULT_PREFIX = '{hostname}-'
+DEFAULT_PREFIX = '{hostname}-'  # noqa: FS003
 
 
 logger = logging.getLogger(__name__)
@@ -196,7 +196,7 @@ def make_check_flags(local_borg_version, checks, check_last=None, prefix=None):
         return common_flags
 
     return (
-        tuple('--{}-only'.format(check) for check in checks if check in ('repository', 'archives'))
+        tuple(f'--{check}-only' for check in checks if check in ('repository', 'archives'))
         + common_flags
     )
 
diff --git a/borgmatic/borg/create.py b/borgmatic/borg/create.py
index 87a0fdd..d557a6a 100644
--- a/borgmatic/borg/create.py
+++ b/borgmatic/borg/create.py
@@ -217,7 +217,7 @@ def make_list_filter_flags(local_borg_version, dry_run):
         return f'{base_flags}-'
 
 
-DEFAULT_ARCHIVE_NAME_FORMAT = '{hostname}-{now:%Y-%m-%dT%H:%M:%S.%f}'
+DEFAULT_ARCHIVE_NAME_FORMAT = '{hostname}-{now:%Y-%m-%dT%H:%M:%S.%f}'  # noqa: FS003
 
 
 def collect_borgmatic_source_directories(borgmatic_source_directory):
diff --git a/borgmatic/borg/export_tar.py b/borgmatic/borg/export_tar.py
index 43ea4ac..01d1b7e 100644
--- a/borgmatic/borg/export_tar.py
+++ b/borgmatic/borg/export_tar.py
@@ -56,7 +56,7 @@ def export_tar_archive(
         output_log_level = logging.INFO
 
     if dry_run:
-        logging.info('{}: Skipping export to tar file (dry run)'.format(repository))
+        logging.info(f'{repository}: Skipping export to tar file (dry run)')
         return
 
     execute_command(
diff --git a/borgmatic/borg/flags.py b/borgmatic/borg/flags.py
index 81b6a6b..845e0ff 100644
--- a/borgmatic/borg/flags.py
+++ b/borgmatic/borg/flags.py
@@ -10,7 +10,7 @@ def make_flags(name, value):
     if not value:
         return ()
 
-    flag = '--{}'.format(name.replace('_', '-'))
+    flag = f"--{name.replace('_', '-')}"
 
     if value is True:
         return (flag,)
diff --git a/borgmatic/borg/list.py b/borgmatic/borg/list.py
index fedd365..916d17b 100644
--- a/borgmatic/borg/list.py
+++ b/borgmatic/borg/list.py
@@ -113,7 +113,7 @@ def capture_archive_listing(
                     paths=[f'sh:{list_path}'],
                     find_paths=None,
                     json=None,
-                    format='{path}{NL}',
+                    format='{path}{NL}',  # noqa: FS003
                 ),
                 local_path,
                 remote_path,
diff --git a/borgmatic/borg/prune.py b/borgmatic/borg/prune.py
index e53197f..5be85de 100644
--- a/borgmatic/borg/prune.py
+++ b/borgmatic/borg/prune.py
@@ -24,7 +24,7 @@ def make_prune_flags(retention_config, local_borg_version):
         )
     '''
     config = retention_config.copy()
-    prefix = config.pop('prefix', '{hostname}-')
+    prefix = config.pop('prefix', '{hostname}-')  # noqa: FS003
 
     if prefix:
         if feature.available(feature.Feature.MATCH_ARCHIVES, local_borg_version):
diff --git a/borgmatic/borg/rlist.py b/borgmatic/borg/rlist.py
index 33404f9..43bc28d 100644
--- a/borgmatic/borg/rlist.py
+++ b/borgmatic/borg/rlist.py
@@ -42,7 +42,7 @@ def resolve_archive_name(
     except IndexError:
         raise ValueError('No archives found in the repository')
 
-    logger.debug('{}: Latest archive is {}'.format(repository, latest_archive))
+    logger.debug(f'{repository}: Latest archive is {latest_archive}')
 
     return latest_archive
 
diff --git a/borgmatic/commands/arguments.py b/borgmatic/commands/arguments.py
index d5dc6af..773a0ba 100644
--- a/borgmatic/commands/arguments.py
+++ b/borgmatic/commands/arguments.py
@@ -131,9 +131,7 @@ def make_parsers():
         nargs='*',
         dest='config_paths',
         default=config_paths,
-        help='Configuration filenames or directories, defaults to: {}'.format(
-            ' '.join(unexpanded_config_paths)
-        ),
+        help=f"Configuration filenames or directories, defaults to: {' '.join(unexpanded_config_paths)}",
     )
     global_group.add_argument(
         '--excludes',
diff --git a/borgmatic/commands/borgmatic.py b/borgmatic/commands/borgmatic.py
index fbea260..73bde94 100644
--- a/borgmatic/commands/borgmatic.py
+++ b/borgmatic/commands/borgmatic.py
@@ -70,9 +70,7 @@ def run_configuration(config_filename, config, arguments):
     try:
         local_borg_version = borg_version.local_borg_version(storage, local_path)
     except (OSError, CalledProcessError, ValueError) as error:
-        yield from log_error_records(
-            '{}: Error getting local Borg version'.format(config_filename), error
-        )
+        yield from log_error_records(f'{config_filename}: Error getting local Borg version', error)
         return
 
     try:
@@ -100,7 +98,7 @@ def run_configuration(config_filename, config, arguments):
             return
 
         encountered_error = error
-        yield from log_error_records('{}: Error pinging monitor'.format(config_filename), error)
+        yield from log_error_records(f'{config_filename}: Error pinging monitor', error)
 
     if not encountered_error:
         repo_queue = Queue()
@@ -132,7 +130,7 @@ def run_configuration(config_filename, config, arguments):
                     repo_queue.put((repository_path, retry_num + 1),)
                     tuple(  # Consume the generator so as to trigger logging.
                         log_error_records(
-                            '{}: Error running actions for repository'.format(repository_path),
+                            f'{repository_path}: Error running actions for repository',
                             error,
                             levelno=logging.WARNING,
                             log_command_error_output=True,
@@ -147,7 +145,7 @@ def run_configuration(config_filename, config, arguments):
                     return
 
                 yield from log_error_records(
-                    '{}: Error running actions for repository'.format(repository_path), error
+                    f'{repository_path}: Error running actions for repository', error
                 )
                 encountered_error = error
                 error_repository = repository_path
@@ -169,7 +167,7 @@ def run_configuration(config_filename, config, arguments):
             return
 
         encountered_error = error
-        yield from log_error_records('{}: Error pinging monitor'.format(config_filename), error)
+        yield from log_error_records(f'{repository_path}: Error pinging monitor', error)
 
     if not encountered_error:
         try:
@@ -196,7 +194,7 @@ def run_configuration(config_filename, config, arguments):
                 return
 
             encountered_error = error
-            yield from log_error_records('{}: Error pinging monitor'.format(config_filename), error)
+            yield from log_error_records(f'{config_filename}: Error pinging monitor', error)
 
     if encountered_error and using_primary_action:
         try:
@@ -231,9 +229,7 @@ def run_configuration(config_filename, config, arguments):
             if command.considered_soft_failure(config_filename, error):
                 return
 
-            yield from log_error_records(
-                '{}: Error running on-error hook'.format(config_filename), error
-            )
+            yield from log_error_records(f'{config_filename}: Error running on-error hook', error)
 
 
 def run_actions(
@@ -472,9 +468,7 @@ def load_configurations(config_filenames, overrides=None, resolve_env=True):
                         dict(
                             levelno=logging.WARNING,
                             levelname='WARNING',
-                            msg='{}: Insufficient permissions to read configuration file'.format(
-                                config_filename
-                            ),
+                            msg=f'{config_filename}: Insufficient permissions to read configuration file',
                         )
                     ),
                 ]
@@ -486,7 +480,7 @@ def load_configurations(config_filenames, overrides=None, resolve_env=True):
                         dict(
                             levelno=logging.CRITICAL,
                             levelname='CRITICAL',
-                            msg='{}: Error parsing configuration file'.format(config_filename),
+                            msg=f'{config_filename}: Error parsing configuration file',
                         )
                     ),
                     logging.makeLogRecord(
@@ -587,9 +581,7 @@ def collect_configuration_run_summary_logs(configs, arguments):
 
     if not configs:
         yield from log_error_records(
-            '{}: No valid configuration files found'.format(
-                ' '.join(arguments['global'].config_paths)
-            )
+            r"{' '.join(arguments['global'].config_paths)}: No valid configuration files found",
         )
         return
 
@@ -615,21 +607,21 @@ def collect_configuration_run_summary_logs(configs, arguments):
         error_logs = tuple(result for result in results if isinstance(result, logging.LogRecord))
 
         if error_logs:
-            yield from log_error_records('{}: An error occurred'.format(config_filename))
+            yield from log_error_records(f'{config_filename}: An error occurred')
             yield from error_logs
         else:
             yield logging.makeLogRecord(
                 dict(
                     levelno=logging.INFO,
                     levelname='INFO',
-                    msg='{}: Successfully ran configuration file'.format(config_filename),
+                    msg=f'{config_filename}: Successfully ran configuration file',
                 )
             )
             if results:
                 json_results.extend(results)
 
     if 'umount' in arguments:
-        logger.info('Unmounting mount point {}'.format(arguments['umount'].mount_point))
+        logger.info(f"Unmounting mount point {arguments['umount'].mount_point}")
         try:
             borg_umount.unmount_archive(
                 mount_point=arguments['umount'].mount_point, local_path=get_local_path(configs),
@@ -677,7 +669,7 @@ def main():  # pragma: no cover
         if error.code == 0:
             raise error
         configure_logging(logging.CRITICAL)
-        logger.critical('Error parsing arguments: {}'.format(' '.join(sys.argv)))
+        logger.critical(f"Error parsing arguments: {' '.join(sys.argv)}")
         exit_with_help_link()
 
     global_arguments = arguments['global']
@@ -710,7 +702,7 @@ def main():  # pragma: no cover
         )
     except (FileNotFoundError, PermissionError) as error:
         configure_logging(logging.CRITICAL)
-        logger.critical('Error configuring logging: {}'.format(error))
+        logger.critical(f'Error configuring logging: {error}')
         exit_with_help_link()
 
     logger.debug('Ensuring legacy configuration is upgraded')
diff --git a/borgmatic/commands/completion.py b/borgmatic/commands/completion.py
index 0ff1f3e..1fc976b 100644
--- a/borgmatic/commands/completion.py
+++ b/borgmatic/commands/completion.py
@@ -34,7 +34,7 @@ def bash_completion():
             '    local this_script="$(cat "$BASH_SOURCE" 2> /dev/null)"',
             '    local installed_script="$(borgmatic --bash-completion 2> /dev/null)"',
             '    if [ "$this_script" != "$installed_script" ] && [ "$installed_script" != "" ];'
-            '        then cat << EOF\n%s\nEOF' % UPGRADE_MESSAGE,
+            f'        then cat << EOF\n{UPGRADE_MESSAGE}\nEOF',
             '    fi',
             '}',
             'complete_borgmatic() {',
@@ -48,7 +48,7 @@ def bash_completion():
             for action, subparser in subparsers.choices.items()
         )
         + (
-            '    COMPREPLY=($(compgen -W "%s %s" -- "${COMP_WORDS[COMP_CWORD]}"))'
+            '    COMPREPLY=($(compgen -W "%s %s" -- "${COMP_WORDS[COMP_CWORD]}"))'  # noqa: FS003
             % (actions, global_flags),
             '    (check_version &)',
             '}',
diff --git a/borgmatic/commands/convert_config.py b/borgmatic/commands/convert_config.py
index 093d4e3..64a8948 100644
--- a/borgmatic/commands/convert_config.py
+++ b/borgmatic/commands/convert_config.py
@@ -28,9 +28,7 @@ def parse_arguments(*arguments):
         '--source-config',
         dest='source_config_filename',
         default=DEFAULT_SOURCE_CONFIG_FILENAME,
-        help='Source INI-style configuration filename. Default: {}'.format(
-            DEFAULT_SOURCE_CONFIG_FILENAME
-        ),
+        help=f'Source INI-style configuration filename. Default: {DEFAULT_SOURCE_CONFIG_FILENAME}',
     )
     parser.add_argument(
         '-e',
@@ -46,9 +44,7 @@ def parse_arguments(*arguments):
         '--destination-config',
         dest='destination_config_filename',
         default=DEFAULT_DESTINATION_CONFIG_FILENAME,
-        help='Destination YAML configuration filename. Default: {}'.format(
-            DEFAULT_DESTINATION_CONFIG_FILENAME
-        ),
+        help=f'Destination YAML configuration filename. Default: {DEFAULT_DESTINATION_CONFIG_FILENAME}',
     )
 
     return parser.parse_args(arguments)
@@ -59,19 +55,15 @@ TEXT_WRAP_CHARACTERS = 80
 
 def display_result(args):  # pragma: no cover
     result_lines = textwrap.wrap(
-        'Your borgmatic configuration has been upgraded. Please review the result in {}.'.format(
-            args.destination_config_filename
-        ),
+        f'Your borgmatic configuration has been upgraded. Please review the result in {args.destination_config_filename}.',
         TEXT_WRAP_CHARACTERS,
     )
 
+    excludes_phrase = (
+        f' and {args.source_excludes_filename}' if args.source_excludes_filename else ''
+    )
     delete_lines = textwrap.wrap(
-        'Once you are satisfied, you can safely delete {}{}.'.format(
-            args.source_config_filename,
-            ' and {}'.format(args.source_excludes_filename)
-            if args.source_excludes_filename
-            else '',
-        ),
+        f'Once you are satisfied, you can safely delete {args.source_config_filename}{excludes_phrase}.',
         TEXT_WRAP_CHARACTERS,
     )
 
diff --git a/borgmatic/commands/generate_config.py b/borgmatic/commands/generate_config.py
index 13a5cba..78c32f0 100644
--- a/borgmatic/commands/generate_config.py
+++ b/borgmatic/commands/generate_config.py
@@ -23,9 +23,7 @@ def parse_arguments(*arguments):
         '--destination',
         dest='destination_filename',
         default=DEFAULT_DESTINATION_CONFIG_FILENAME,
-        help='Destination YAML configuration file, default: {}'.format(
-            DEFAULT_DESTINATION_CONFIG_FILENAME
-        ),
+        help=f'Destination YAML configuration file, default: {DEFAULT_DESTINATION_CONFIG_FILENAME}',
     )
     parser.add_argument(
         '--overwrite',
@@ -48,17 +46,13 @@ def main():  # pragma: no cover
             overwrite=args.overwrite,
         )
 
-        print('Generated a sample configuration file at {}.'.format(args.destination_filename))
+        print(f'Generated a sample configuration file at {args.destination_filename}.')
         print()
         if args.source_filename:
-            print(
-                'Merged in the contents of configuration file at {}.'.format(args.source_filename)
-            )
+            print(f'Merged in the contents of configuration file at {args.source_filename}.')
             print('To review the changes made, run:')
             print()
-            print(
-                '    diff --unified {} {}'.format(args.source_filename, args.destination_filename)
-            )
+            print(f'    diff --unified {args.source_filename} {args.destination_filename}')
             print()
         print('This includes all available configuration options with example values. The few')
         print('required options are indicated. Please edit the file to suit your needs.')
diff --git a/borgmatic/commands/validate_config.py b/borgmatic/commands/validate_config.py
index 00ea9f4..44c0082 100644
--- a/borgmatic/commands/validate_config.py
+++ b/borgmatic/commands/validate_config.py
@@ -21,9 +21,7 @@ def parse_arguments(*arguments):
         nargs='+',
         dest='config_paths',
         default=config_paths,
-        help='Configuration filenames or directories, defaults to: {}'.format(
-            ' '.join(config_paths)
-        ),
+        help=f'Configuration filenames or directories, defaults to: {config_paths}',
     )
 
     return parser.parse_args(arguments)
@@ -44,13 +42,11 @@ def main():  # pragma: no cover
         try:
             validate.parse_configuration(config_filename, validate.schema_filename())
         except (ValueError, OSError, validate.Validation_error) as error:
-            logging.critical('{}: Error parsing configuration file'.format(config_filename))
+            logging.critical(f'{config_filename}: Error parsing configuration file')
             logging.critical(error)
             found_issues = True
 
     if found_issues:
         sys.exit(1)
     else:
-        logger.info(
-            'All given configuration files are valid: {}'.format(', '.join(config_filenames))
-        )
+        logger.info(f"All given configuration files are valid: {', '.join(config_filenames)}")
diff --git a/borgmatic/config/collect.py b/borgmatic/config/collect.py
index a13472e..bd38fee 100644
--- a/borgmatic/config/collect.py
+++ b/borgmatic/config/collect.py
@@ -16,8 +16,8 @@ def get_default_config_paths(expand_home=True):
     return [
         '/etc/borgmatic/config.yaml',
         '/etc/borgmatic.d',
-        '%s/borgmatic/config.yaml' % user_config_directory,
-        '%s/borgmatic.d' % user_config_directory,
+        os.path.join(user_config_directory, 'borgmatic/config.yaml'),
+        os.path.join(user_config_directory, 'borgmatic.d'),
     ]
 
 
diff --git a/borgmatic/config/environment.py b/borgmatic/config/environment.py
index 3a58566..a2857bb 100644
--- a/borgmatic/config/environment.py
+++ b/borgmatic/config/environment.py
@@ -14,11 +14,14 @@ def _resolve_string(matcher):
     if matcher.group('escape') is not None:
         # in case of escaped envvar, unescape it
         return matcher.group('variable')
+
     # resolve the env var
     name, default = matcher.group('name'), matcher.group('default')
     out = os.getenv(name, default=default)
+
     if out is None:
-        raise ValueError('Cannot find variable ${name} in environment'.format(name=name))
+        raise ValueError(f'Cannot find variable {name} in environment')
+
     return out
 
 
diff --git a/borgmatic/config/generate.py b/borgmatic/config/generate.py
index e864a3c..d486f23 100644
--- a/borgmatic/config/generate.py
+++ b/borgmatic/config/generate.py
@@ -48,7 +48,7 @@ def _schema_to_sample_configuration(schema, level=0, parent_is_sequence=False):
             config, schema, indent=indent, skip_first=parent_is_sequence
         )
     else:
-        raise ValueError('Schema at level {} is unsupported: {}'.format(level, schema))
+        raise ValueError(f'Schema at level {level} is unsupported: {schema}')
 
     return config
 
@@ -84,7 +84,7 @@ def _comment_out_optional_configuration(rendered_config):
     for line in rendered_config.split('\n'):
         # Upon encountering an optional configuration option, comment out lines until the next blank
         # line.
-        if line.strip().startswith('# {}'.format(COMMENTED_OUT_SENTINEL)):
+        if line.strip().startswith(f'# {COMMENTED_OUT_SENTINEL}'):
             optional = True
             continue
 
@@ -117,9 +117,7 @@ def write_configuration(config_filename, rendered_config, mode=0o600, overwrite=
     '''
     if not overwrite and os.path.exists(config_filename):
         raise FileExistsError(
-            '{} already exists. Aborting. Use --overwrite to replace the file.'.format(
-                config_filename
-            )
+            f'{config_filename} already exists. Aborting. Use --overwrite to replace the file.'
         )
 
     try:
@@ -218,7 +216,7 @@ def remove_commented_out_sentinel(config, field_name):
     except KeyError:
         return
 
-    if last_comment_value == '# {}\n'.format(COMMENTED_OUT_SENTINEL):
+    if last_comment_value == f'# {COMMENTED_OUT_SENTINEL}\n':
         config.ca.items[field_name][RUAMEL_YAML_COMMENTS_INDEX].pop()
 
 
diff --git a/borgmatic/config/legacy.py b/borgmatic/config/legacy.py
index 9135278..ec1e50a 100644
--- a/borgmatic/config/legacy.py
+++ b/borgmatic/config/legacy.py
@@ -70,13 +70,11 @@ def validate_configuration_format(parser, config_format):
         section_format.name for section_format in config_format
     )
     if unknown_section_names:
-        raise ValueError(
-            'Unknown config sections found: {}'.format(', '.join(unknown_section_names))
-        )
+        raise ValueError(f"Unknown config sections found: {', '.join(unknown_section_names)}")
 
     missing_section_names = set(required_section_names) - section_names
     if missing_section_names:
-        raise ValueError('Missing config sections: {}'.format(', '.join(missing_section_names)))
+        raise ValueError(f"Missing config sections: {', '.join(missing_section_names)}")
 
     for section_format in config_format:
         if section_format.name not in section_names:
@@ -91,9 +89,7 @@ def validate_configuration_format(parser, config_format):
 
         if unexpected_option_names:
             raise ValueError(
-                'Unexpected options found in config section {}: {}'.format(
-                    section_format.name, ', '.join(sorted(unexpected_option_names))
-                )
+                f"Unexpected options found in config section {section_format.name}: {', '.join(sorted(unexpected_option_names))}",
             )
 
         missing_option_names = tuple(
@@ -105,9 +101,7 @@ def validate_configuration_format(parser, config_format):
 
         if missing_option_names:
             raise ValueError(
-                'Required options missing from config section {}: {}'.format(
-                    section_format.name, ', '.join(missing_option_names)
-                )
+                f"Required options missing from config section {section_format.name}: {', '.join(missing_option_names)}",
             )
 
 
@@ -137,7 +131,7 @@ def parse_configuration(config_filename, config_format):
     '''
     parser = RawConfigParser()
     if not parser.read(config_filename):
-        raise ValueError('Configuration file cannot be opened: {}'.format(config_filename))
+        raise ValueError(f'Configuration file cannot be opened: {config_filename}')
 
     validate_configuration_format(parser, config_format)
 
diff --git a/borgmatic/config/validate.py b/borgmatic/config/validate.py
index 5828380..10da19c 100644
--- a/borgmatic/config/validate.py
+++ b/borgmatic/config/validate.py
@@ -20,9 +20,9 @@ def format_json_error_path_element(path_element):
     Given a path element into a JSON data structure, format it for display as a string.
     '''
     if isinstance(path_element, int):
-        return str('[{}]'.format(path_element))
+        return str(f'[{path_element}]')
 
-    return str('.{}'.format(path_element))
+    return str(f'.{path_element}')
 
 
 def format_json_error(error):
@@ -30,10 +30,10 @@ def format_json_error(error):
     Given an instance of jsonschema.exceptions.ValidationError, format it for display as a string.
     '''
     if not error.path:
-        return 'At the top level: {}'.format(error.message)
+        return f'At the top level: {error.message}'
 
     formatted_path = ''.join(format_json_error_path_element(element) for element in error.path)
-    return "At '{}': {}".format(formatted_path.lstrip('.'), error.message)
+    return f"At '{formatted_path.lstrip('.')}': {error.message}"
 
 
 class Validation_error(ValueError):
@@ -54,9 +54,10 @@ class Validation_error(ValueError):
         '''
         Render a validation error as a user-facing string.
         '''
-        return 'An error occurred while parsing a configuration file at {}:\n'.format(
-            self.config_filename
-        ) + '\n'.join(error for error in self.errors)
+        return (
+            f'An error occurred while parsing a configuration file at {self.config_filename}:\n'
+            + '\n'.join(error for error in self.errors)
+        )
 
 
 def apply_logical_validation(config_filename, parsed_configuration):
@@ -72,9 +73,7 @@ def apply_logical_validation(config_filename, parsed_configuration):
             raise Validation_error(
                 config_filename,
                 (
-                    'Unknown repository in the "consistency" section\'s "check_repositories": {}'.format(
-                        repository
-                    ),
+                    f'Unknown repository in the "consistency" section\'s "check_repositories": {repository}',
                 ),
             )
 
@@ -165,9 +164,9 @@ def guard_configuration_contains_repository(repository, configurations):
     )
 
     if count == 0:
-        raise ValueError('Repository {} not found in configuration files'.format(repository))
+        raise ValueError(f'Repository {repository} not found in configuration files')
     if count > 1:
-        raise ValueError('Repository {} found in multiple configuration files'.format(repository))
+        raise ValueError(f'Repository {repository} found in multiple configuration files')
 
 
 def guard_single_repository_selected(repository, configurations):
diff --git a/borgmatic/execute.py b/borgmatic/execute.py
index a01e1a1..53d1a09 100644
--- a/borgmatic/execute.py
+++ b/borgmatic/execute.py
@@ -154,8 +154,8 @@ def log_command(full_command, input_file=None, output_file=None):
     '''
     logger.debug(
         ' '.join(full_command)
-        + (' < {}'.format(getattr(input_file, 'name', '')) if input_file else '')
-        + (' > {}'.format(getattr(output_file, 'name', '')) if output_file else '')
+        + (f" < {getattr(input_file, 'name', '')}" if input_file else '')
+        + (f" > {getattr(output_file, 'name', '')}" if output_file else '')
     )
 
 
@@ -235,12 +235,12 @@ def execute_command_and_capture_output(
             env=environment,
             cwd=working_directory,
         )
-        logger.warning('Command output: {}'.format(output))
+        logger.warning(f'Command output: {output}')
     except subprocess.CalledProcessError as error:
         if exit_code_indicates_error(command, error.returncode):
             raise
         output = error.output
-        logger.warning('Command output: {}'.format(output))
+        logger.warning(f'Command output: {output}')
 
     return output.decode() if output is not None else None
 
diff --git a/borgmatic/hooks/command.py b/borgmatic/hooks/command.py
index 756f877..05f7d2f 100644
--- a/borgmatic/hooks/command.py
+++ b/borgmatic/hooks/command.py
@@ -16,7 +16,7 @@ def interpolate_context(config_filename, hook_description, command, context):
     names/values, interpolate the values by "{name}" into the command and return the result.
     '''
     for name, value in context.items():
-        command = command.replace('{%s}' % name, str(value))
+        command = command.replace(f'{{{name}}}', str(value))
 
     for unsupported_variable in re.findall(r'{\w+}', command):
         logger.warning(
@@ -38,7 +38,7 @@ def execute_hook(commands, umask, config_filename, description, dry_run, **conte
     Raise subprocesses.CalledProcessError if an error occurs in a hook.
     '''
     if not commands:
-        logger.debug('{}: No commands to run for {} hook'.format(config_filename, description))
+        logger.debug(f'{config_filename}: No commands to run for {description} hook')
         return
 
     dry_run_label = ' (dry run; not actually running hooks)' if dry_run else ''
@@ -49,19 +49,15 @@ def execute_hook(commands, umask, config_filename, description, dry_run, **conte
     ]
 
     if len(commands) == 1:
-        logger.info(
-            '{}: Running command for {} hook{}'.format(config_filename, description, dry_run_label)
-        )
+        logger.info(f'{config_filename}: Running command for {description} hook{dry_run_label}')
     else:
         logger.info(
-            '{}: Running {} commands for {} hook{}'.format(
-                config_filename, len(commands), description, dry_run_label
-            )
+            f'{config_filename}: Running {len(commands)} commands for {description} hook{dry_run_label}',
         )
 
     if umask:
         parsed_umask = int(str(umask), 8)
-        logger.debug('{}: Set hook umask to {}'.format(config_filename, oct(parsed_umask)))
+        logger.debug(f'{config_filename}: Set hook umask to {oct(parsed_umask)}')
         original_umask = os.umask(parsed_umask)
     else:
         original_umask = None
@@ -93,9 +89,7 @@ def considered_soft_failure(config_filename, error):
 
     if exit_code == SOFT_FAIL_EXIT_CODE:
         logger.info(
-            '{}: Command hook exited with soft failure exit code ({}); skipping remaining actions'.format(
-                config_filename, SOFT_FAIL_EXIT_CODE
-            )
+            f'{config_filename}: Command hook exited with soft failure exit code ({SOFT_FAIL_EXIT_CODE}); skipping remaining actions',
         )
         return True
 
diff --git a/borgmatic/hooks/cronhub.py b/borgmatic/hooks/cronhub.py
index cd0ffa5..05ada57 100644
--- a/borgmatic/hooks/cronhub.py
+++ b/borgmatic/hooks/cronhub.py
@@ -34,17 +34,15 @@ def ping_monitor(hook_config, config_filename, state, monitoring_log_level, dry_
         return
 
     dry_run_label = ' (dry run; not actually pinging)' if dry_run else ''
-    formatted_state = '/{}/'.format(MONITOR_STATE_TO_CRONHUB[state])
+    formatted_state = f'/{MONITOR_STATE_TO_CRONHUB[state]}/'
     ping_url = (
         hook_config['ping_url']
         .replace('/start/', formatted_state)
         .replace('/ping/', formatted_state)
     )
 
-    logger.info(
-        '{}: Pinging Cronhub {}{}'.format(config_filename, state.name.lower(), dry_run_label)
-    )
-    logger.debug('{}: Using Cronhub ping URL {}'.format(config_filename, ping_url))
+    logger.info(f'{config_filename}: Pinging Cronhub {state.name.lower()}{dry_run_label}')
+    logger.debug(f'{config_filename}: Using Cronhub ping URL {ping_url}')
 
     if not dry_run:
         logging.getLogger('urllib3').setLevel(logging.ERROR)
diff --git a/borgmatic/hooks/cronitor.py b/borgmatic/hooks/cronitor.py
index 633b4c3..d669c09 100644
--- a/borgmatic/hooks/cronitor.py
+++ b/borgmatic/hooks/cronitor.py
@@ -34,12 +34,10 @@ def ping_monitor(hook_config, config_filename, state, monitoring_log_level, dry_
         return
 
     dry_run_label = ' (dry run; not actually pinging)' if dry_run else ''
-    ping_url = '{}/{}'.format(hook_config['ping_url'], MONITOR_STATE_TO_CRONITOR[state])
+    ping_url = f"{hook_config['ping_url']}/{MONITOR_STATE_TO_CRONITOR[state]}"
 
-    logger.info(
-        '{}: Pinging Cronitor {}{}'.format(config_filename, state.name.lower(), dry_run_label)
-    )
-    logger.debug('{}: Using Cronitor ping URL {}'.format(config_filename, ping_url))
+    logger.info(f'{config_filename}: Pinging Cronitor {state.name.lower()}{dry_run_label}')
+    logger.debug(f'{config_filename}: Using Cronitor ping URL {ping_url}')
 
     if not dry_run:
         logging.getLogger('urllib3').setLevel(logging.ERROR)
diff --git a/borgmatic/hooks/dispatch.py b/borgmatic/hooks/dispatch.py
index 88a99eb..fa7bd9b 100644
--- a/borgmatic/hooks/dispatch.py
+++ b/borgmatic/hooks/dispatch.py
@@ -43,9 +43,9 @@ def call_hook(function_name, hooks, log_prefix, hook_name, *args, **kwargs):
     try:
         module = HOOK_NAME_TO_MODULE[hook_name]
     except KeyError:
-        raise ValueError('Unknown hook name: {}'.format(hook_name))
+        raise ValueError(f'Unknown hook name: {hook_name}')
 
-    logger.debug('{}: Calling {} hook function {}'.format(log_prefix, hook_name, function_name))
+    logger.debug(f'{log_prefix}: Calling {hook_name} hook function {function_name}')
     return getattr(module, function_name)(config, log_prefix, *args, **kwargs)
 
 
diff --git a/borgmatic/hooks/dump.py b/borgmatic/hooks/dump.py
index 43686d3..015ed69 100644
--- a/borgmatic/hooks/dump.py
+++ b/borgmatic/hooks/dump.py
@@ -33,7 +33,7 @@ def make_database_dump_filename(dump_path, name, hostname=None):
     Raise ValueError if the database name is invalid.
     '''
     if os.path.sep in name:
-        raise ValueError('Invalid database name {}'.format(name))
+        raise ValueError(f'Invalid database name {name}')
 
     return os.path.join(os.path.expanduser(dump_path), hostname or 'localhost', name)
 
@@ -60,9 +60,7 @@ def remove_database_dumps(dump_path, database_type_name, log_prefix, dry_run):
     '''
     dry_run_label = ' (dry run; not actually removing anything)' if dry_run else ''
 
-    logger.debug(
-        '{}: Removing {} database dumps{}'.format(log_prefix, database_type_name, dry_run_label)
-    )
+    logger.debug(f'{log_prefix}: Removing {database_type_name} database dumps{dry_run_label}')
 
     expanded_path = os.path.expanduser(dump_path)
 
@@ -78,4 +76,4 @@ def convert_glob_patterns_to_borg_patterns(patterns):
     Convert a sequence of shell glob patterns like "/etc/*" to the corresponding Borg archive
     patterns like "sh:etc/*".
     '''
-    return ['sh:{}'.format(pattern.lstrip(os.path.sep)) for pattern in patterns]
+    return [f'sh:{pattern.lstrip(os.path.sep)}' for pattern in patterns]
diff --git a/borgmatic/hooks/healthchecks.py b/borgmatic/hooks/healthchecks.py
index 6ad8449..4cafc49 100644
--- a/borgmatic/hooks/healthchecks.py
+++ b/borgmatic/hooks/healthchecks.py
@@ -99,7 +99,7 @@ def ping_monitor(hook_config, config_filename, state, monitoring_log_level, dry_
     ping_url = (
         hook_config['ping_url']
         if hook_config['ping_url'].startswith('http')
-        else 'https://hc-ping.com/{}'.format(hook_config['ping_url'])
+        else f"https://hc-ping.com/{hook_config['ping_url']}"
     )
     dry_run_label = ' (dry run; not actually pinging)' if dry_run else ''
 
@@ -111,12 +111,10 @@ def ping_monitor(hook_config, config_filename, state, monitoring_log_level, dry_
 
     healthchecks_state = MONITOR_STATE_TO_HEALTHCHECKS.get(state)
     if healthchecks_state:
-        ping_url = '{}/{}'.format(ping_url, healthchecks_state)
+        ping_url = f'{ping_url}/{healthchecks_state}'
 
-    logger.info(
-        '{}: Pinging Healthchecks {}{}'.format(config_filename, state.name.lower(), dry_run_label)
-    )
-    logger.debug('{}: Using Healthchecks ping URL {}'.format(config_filename, ping_url))
+    logger.info(f'{config_filename}: Pinging Healthchecks {state.name.lower()}{dry_run_label}')
+    logger.debug(f'{config_filename}: Using Healthchecks ping URL {ping_url}')
 
     if state in (monitor.State.FINISH, monitor.State.FAIL, monitor.State.LOG):
         payload = format_buffered_logs_for_payload()
diff --git a/borgmatic/hooks/mongodb.py b/borgmatic/hooks/mongodb.py
index 8c3cab7..be5f656 100644
--- a/borgmatic/hooks/mongodb.py
+++ b/borgmatic/hooks/mongodb.py
@@ -27,7 +27,7 @@ def dump_databases(databases, log_prefix, location_config, dry_run):
     '''
     dry_run_label = ' (dry run; not actually dumping anything)' if dry_run else ''
 
-    logger.info('{}: Dumping MongoDB databases{}'.format(log_prefix, dry_run_label))
+    logger.info(f'{log_prefix}: Dumping MongoDB databases{dry_run_label}')
 
     processes = []
     for database in databases:
@@ -38,9 +38,7 @@ def dump_databases(databases, log_prefix, location_config, dry_run):
         dump_format = database.get('format', 'archive')
 
         logger.debug(
-            '{}: Dumping MongoDB database {} to {}{}'.format(
-                log_prefix, name, dump_filename, dry_run_label
-            )
+            f'{log_prefix}: Dumping MongoDB database {name} to {dump_filename}{dry_run_label}',
         )
         if dry_run:
             continue
@@ -126,9 +124,7 @@ def restore_database_dump(database_config, log_prefix, location_config, dry_run,
     )
     restore_command = build_restore_command(extract_process, database, dump_filename)
 
-    logger.debug(
-        '{}: Restoring MongoDB database {}{}'.format(log_prefix, database['name'], dry_run_label)
-    )
+    logger.debug(f"{log_prefix}: Restoring MongoDB database {database['name']}{dry_run_label}")
     if dry_run:
         return
 
diff --git a/borgmatic/hooks/mysql.py b/borgmatic/hooks/mysql.py
index e53b896..0bf9774 100644
--- a/borgmatic/hooks/mysql.py
+++ b/borgmatic/hooks/mysql.py
@@ -119,7 +119,7 @@ def dump_databases(databases, log_prefix, location_config, dry_run):
     dry_run_label = ' (dry run; not actually dumping anything)' if dry_run else ''
     processes = []
 
-    logger.info('{}: Dumping MySQL databases{}'.format(log_prefix, dry_run_label))
+    logger.info(f'{log_prefix}: Dumping MySQL databases{dry_run_label}')
 
     for database in databases:
         dump_path = make_dump_path(location_config)
@@ -209,9 +209,7 @@ def restore_database_dump(database_config, log_prefix, location_config, dry_run,
     )
     extra_environment = {'MYSQL_PWD': database['password']} if 'password' in database else None
 
-    logger.debug(
-        '{}: Restoring MySQL database {}{}'.format(log_prefix, database['name'], dry_run_label)
-    )
+    logger.debug(f"{log_prefix}: Restoring MySQL database {database['name']}{dry_run_label}")
     if dry_run:
         return
 
diff --git a/borgmatic/hooks/pagerduty.py b/borgmatic/hooks/pagerduty.py
index fbb67fb..561b1e2 100644
--- a/borgmatic/hooks/pagerduty.py
+++ b/borgmatic/hooks/pagerduty.py
@@ -29,14 +29,12 @@ def ping_monitor(hook_config, config_filename, state, monitoring_log_level, dry_
     '''
     if state != monitor.State.FAIL:
         logger.debug(
-            '{}: Ignoring unsupported monitoring {} in PagerDuty hook'.format(
-                config_filename, state.name.lower()
-            )
+            f'{config_filename}: Ignoring unsupported monitoring {state.name.lower()} in PagerDuty hook',
         )
         return
 
     dry_run_label = ' (dry run; not actually sending)' if dry_run else ''
-    logger.info('{}: Sending failure event to PagerDuty {}'.format(config_filename, dry_run_label))
+    logger.info(f'{config_filename}: Sending failure event to PagerDuty {dry_run_label}')
 
     if dry_run:
         return
@@ -50,7 +48,7 @@ def ping_monitor(hook_config, config_filename, state, monitoring_log_level, dry_
             'routing_key': hook_config['integration_key'],
             'event_action': 'trigger',
             'payload': {
-                'summary': 'backup failed on {}'.format(hostname),
+                'summary': f'backup failed on {hostname}',
                 'severity': 'error',
                 'source': hostname,
                 'timestamp': local_timestamp,
@@ -65,7 +63,7 @@ def ping_monitor(hook_config, config_filename, state, monitoring_log_level, dry_
             },
         }
     )
-    logger.debug('{}: Using PagerDuty payload: {}'.format(config_filename, payload))
+    logger.debug(f'{config_filename}: Using PagerDuty payload: {payload}')
 
     logging.getLogger('urllib3').setLevel(logging.ERROR)
     try:
diff --git a/borgmatic/hooks/postgresql.py b/borgmatic/hooks/postgresql.py
index 3d3676f..d4799f5 100644
--- a/borgmatic/hooks/postgresql.py
+++ b/borgmatic/hooks/postgresql.py
@@ -93,7 +93,7 @@ def dump_databases(databases, log_prefix, location_config, dry_run):
     dry_run_label = ' (dry run; not actually dumping anything)' if dry_run else ''
     processes = []
 
-    logger.info('{}: Dumping PostgreSQL databases{}'.format(log_prefix, dry_run_label))
+    logger.info(f'{log_prefix}: Dumping PostgreSQL databases{dry_run_label}')
 
     for database in databases:
         extra_environment = make_extra_environment(database)
@@ -228,9 +228,7 @@ def restore_database_dump(database_config, log_prefix, location_config, dry_run,
     )
     extra_environment = make_extra_environment(database)
 
-    logger.debug(
-        '{}: Restoring PostgreSQL database {}{}'.format(log_prefix, database['name'], dry_run_label)
-    )
+    logger.debug(f"{log_prefix}: Restoring PostgreSQL database {database['name']}{dry_run_label}")
     if dry_run:
         return
 
diff --git a/borgmatic/hooks/sqlite.py b/borgmatic/hooks/sqlite.py
index 9e7ecf3..d9f105d 100644
--- a/borgmatic/hooks/sqlite.py
+++ b/borgmatic/hooks/sqlite.py
@@ -26,7 +26,7 @@ def dump_databases(databases, log_prefix, location_config, dry_run):
     dry_run_label = ' (dry run; not actually dumping anything)' if dry_run else ''
     processes = []
 
-    logger.info('{}: Dumping SQLite databases{}'.format(log_prefix, dry_run_label))
+    logger.info(f'{log_prefix}: Dumping SQLite databases{dry_run_label}')
 
     for database in databases:
         database_path = database['path']
diff --git a/borgmatic/logger.py b/borgmatic/logger.py
index 0916bfa..e098bf9 100644
--- a/borgmatic/logger.py
+++ b/borgmatic/logger.py
@@ -108,7 +108,7 @@ def color_text(color, message):
     if not color:
         return message
 
-    return '{}{}{}'.format(color, message, colorama.Style.RESET_ALL)
+    return f'{color}{message}{colorama.Style.RESET_ALL}'
 
 
 def add_logging_level(level_name, level_number):
diff --git a/test_requirements.txt b/test_requirements.txt
index 9cae8fb..d34bc62 100644
--- a/test_requirements.txt
+++ b/test_requirements.txt
@@ -6,6 +6,8 @@ colorama==0.4.4
 coverage==5.3
 flake8==4.0.1
 flake8-quotes==3.3.2
+flake8-use-fstring==1.4
+flake8-variables-names==0.0.5
 flexmock==0.10.4
 isort==5.9.1
 mccabe==0.6.1
diff --git a/tests/end-to-end/test_borgmatic.py b/tests/end-to-end/test_borgmatic.py
index c2d1029..de38bbd 100644
--- a/tests/end-to-end/test_borgmatic.py
+++ b/tests/end-to-end/test_borgmatic.py
@@ -12,17 +12,15 @@ def generate_configuration(config_path, repository_path):
     to work for testing (including injecting the given repository path and tacking on an encryption
     passphrase).
     '''
-    subprocess.check_call(
-        'generate-borgmatic-config --destination {}'.format(config_path).split(' ')
-    )
+    subprocess.check_call(f'generate-borgmatic-config --destination {config_path}'.split(' '))
     config = (
         open(config_path)
         .read()
         .replace('ssh://user@backupserver/./sourcehostname.borg', repository_path)
-        .replace('- ssh://user@backupserver/./{fqdn}', '')
+        .replace('- ssh://user@backupserver/./{fqdn}', '')  # noqa: FS003
         .replace('- /var/local/backups/local.borg', '')
         .replace('- /home/user/path with spaces', '')
-        .replace('- /home', '- {}'.format(config_path))
+        .replace('- /home', f'- {config_path}')
         .replace('- /etc', '')
         .replace('- /var/log/syslog*', '')
         + 'storage:\n    encryption_passphrase: "test"'
@@ -47,13 +45,13 @@ def test_borgmatic_command():
         generate_configuration(config_path, repository_path)
 
         subprocess.check_call(
-            'borgmatic -v 2 --config {} init --encryption repokey'.format(config_path).split(' ')
+            f'borgmatic -v 2 --config {config_path} init --encryption repokey'.split(' ')
         )
 
         # Run borgmatic to generate a backup archive, and then list it to make sure it exists.
-        subprocess.check_call('borgmatic --config {}'.format(config_path).split(' '))
+        subprocess.check_call(f'borgmatic --config {config_path}'.split(' '))
         output = subprocess.check_output(
-            'borgmatic --config {} list --json'.format(config_path).split(' ')
+            f'borgmatic --config {config_path} list --json'.split(' ')
         ).decode(sys.stdout.encoding)
         parsed_output = json.loads(output)
 
@@ -64,16 +62,14 @@ def test_borgmatic_command():
         # Extract the created archive into the current (temporary) directory, and confirm that the
         # extracted file looks right.
         output = subprocess.check_output(
-            'borgmatic --config {} extract --archive {}'.format(config_path, archive_name).split(
-                ' '
-            )
+            f'borgmatic --config {config_path} extract --archive {archive_name}'.split(' '),
         ).decode(sys.stdout.encoding)
         extracted_config_path = os.path.join(extract_path, config_path)
         assert open(extracted_config_path).read() == open(config_path).read()
 
         # Exercise the info action.
         output = subprocess.check_output(
-            'borgmatic --config {} info --json'.format(config_path).split(' ')
+            f'borgmatic --config {config_path} info --json'.split(' '),
         ).decode(sys.stdout.encoding)
         parsed_output = json.loads(output)
 
diff --git a/tests/end-to-end/test_database.py b/tests/end-to-end/test_database.py
index 8849b3c..30aea4a 100644
--- a/tests/end-to-end/test_database.py
+++ b/tests/end-to-end/test_database.py
@@ -189,7 +189,7 @@ def test_database_dump_with_error_causes_borgmatic_to_exit():
                     '-v',
                     '2',
                     '--override',
-                    "hooks.postgresql_databases=[{'name': 'nope'}]",
+                    "hooks.postgresql_databases=[{'name': 'nope'}]",  # noqa: FS003
                 ]
             )
     finally:
diff --git a/tests/end-to-end/test_override.py b/tests/end-to-end/test_override.py
index 0a42018..e86186d 100644
--- a/tests/end-to-end/test_override.py
+++ b/tests/end-to-end/test_override.py
@@ -10,17 +10,15 @@ def generate_configuration(config_path, repository_path):
     to work for testing (including injecting the given repository path and tacking on an encryption
     passphrase).
     '''
-    subprocess.check_call(
-        'generate-borgmatic-config --destination {}'.format(config_path).split(' ')
-    )
+    subprocess.check_call(f'generate-borgmatic-config --destination {config_path}'.split(' '))
     config = (
         open(config_path)
         .read()
         .replace('ssh://user@backupserver/./sourcehostname.borg', repository_path)
-        .replace('- ssh://user@backupserver/./{fqdn}', '')
+        .replace('- ssh://user@backupserver/./{fqdn}', '')  # noqa: FS003
         .replace('- /var/local/backups/local.borg', '')
         .replace('- /home/user/path with spaces', '')
-        .replace('- /home', '- {}'.format(config_path))
+        .replace('- /home', f'- {config_path}')
         .replace('- /etc', '')
         .replace('- /var/log/syslog*', '')
         + 'storage:\n    encryption_passphrase: "test"'
diff --git a/tests/end-to-end/test_validate_config.py b/tests/end-to-end/test_validate_config.py
index 5de83a3..d41464e 100644
--- a/tests/end-to-end/test_validate_config.py
+++ b/tests/end-to-end/test_validate_config.py
@@ -7,12 +7,8 @@ def test_validate_config_command_with_valid_configuration_succeeds():
     with tempfile.TemporaryDirectory() as temporary_directory:
         config_path = os.path.join(temporary_directory, 'test.yaml')
 
-        subprocess.check_call(
-            'generate-borgmatic-config --destination {}'.format(config_path).split(' ')
-        )
-        exit_code = subprocess.call(
-            'validate-borgmatic-config --config {}'.format(config_path).split(' ')
-        )
+        subprocess.check_call(f'generate-borgmatic-config --destination {config_path}'.split(' '))
+        exit_code = subprocess.call(f'validate-borgmatic-config --config {config_path}'.split(' '))
 
         assert exit_code == 0
 
@@ -21,16 +17,12 @@ def test_validate_config_command_with_invalid_configuration_fails():
     with tempfile.TemporaryDirectory() as temporary_directory:
         config_path = os.path.join(temporary_directory, 'test.yaml')
 
-        subprocess.check_call(
-            'generate-borgmatic-config --destination {}'.format(config_path).split(' ')
-        )
+        subprocess.check_call(f'generate-borgmatic-config --destination {config_path}'.split(' '))
         config = open(config_path).read().replace('keep_daily: 7', 'keep_daily: "7"')
         config_file = open(config_path, 'w')
         config_file.write(config)
         config_file.close()
 
-        exit_code = subprocess.call(
-            'validate-borgmatic-config --config {}'.format(config_path).split(' ')
-        )
+        exit_code = subprocess.call(f'validate-borgmatic-config --config {config_path}'.split(' '))
 
         assert exit_code == 1
diff --git a/tests/integration/config/test_legacy.py b/tests/integration/config/test_legacy.py
index 870da88..c73e7ee 100644
--- a/tests/integration/config/test_legacy.py
+++ b/tests/integration/config/test_legacy.py
@@ -7,7 +7,7 @@ from borgmatic.config import legacy as module
 
 def test_parse_section_options_with_punctuation_should_return_section_options():
     parser = module.RawConfigParser()
-    parser.read_file(StringIO('[section]\nfoo: {}\n'.format(string.punctuation)))
+    parser.read_file(StringIO(f'[section]\nfoo: {string.punctuation}\n'))
 
     section_format = module.Section_format(
         'section', (module.Config_option('foo', str, required=True),)
diff --git a/tests/unit/borg/test_create.py b/tests/unit/borg/test_create.py
index 69a3ede..5fb51f3 100644
--- a/tests/unit/borg/test_create.py
+++ b/tests/unit/borg/test_create.py
@@ -449,7 +449,7 @@ def test_collect_special_file_paths_excludes_non_special_files():
     ) == ('/foo', '/baz')
 
 
-DEFAULT_ARCHIVE_NAME = '{hostname}-{now:%Y-%m-%dT%H:%M:%S.%f}'
+DEFAULT_ARCHIVE_NAME = '{hostname}-{now:%Y-%m-%dT%H:%M:%S.%f}'  # noqa: FS003
 REPO_ARCHIVE_WITH_PATHS = (f'repo::{DEFAULT_ARCHIVE_NAME}', 'foo', 'bar')
 
 
@@ -2193,7 +2193,7 @@ def test_create_archive_with_source_directories_glob_expands():
     )
     flexmock(module.environment).should_receive('make_environment')
     flexmock(module).should_receive('execute_command').with_args(
-        ('borg', 'create', 'repo::{}'.format(DEFAULT_ARCHIVE_NAME), 'foo', 'food'),
+        ('borg', 'create', f'repo::{DEFAULT_ARCHIVE_NAME}', 'foo', 'food'),
         output_log_level=logging.INFO,
         output_file=None,
         borg_local_path='borg',
@@ -2236,7 +2236,7 @@ def test_create_archive_with_non_matching_source_directories_glob_passes_through
     )
     flexmock(module.environment).should_receive('make_environment')
     flexmock(module).should_receive('execute_command').with_args(
-        ('borg', 'create', 'repo::{}'.format(DEFAULT_ARCHIVE_NAME), 'foo*'),
+        ('borg', 'create', f'repo::{DEFAULT_ARCHIVE_NAME}', 'foo*'),
         output_log_level=logging.INFO,
         output_file=None,
         borg_local_path='borg',
@@ -2279,7 +2279,7 @@ def test_create_archive_with_glob_calls_borg_with_expanded_directories():
     )
     flexmock(module.environment).should_receive('make_environment')
     flexmock(module).should_receive('execute_command').with_args(
-        ('borg', 'create', 'repo::{}'.format(DEFAULT_ARCHIVE_NAME), 'foo', 'food'),
+        ('borg', 'create', f'repo::{DEFAULT_ARCHIVE_NAME}', 'foo', 'food'),
         output_log_level=logging.INFO,
         output_file=None,
         borg_local_path='borg',
@@ -2345,7 +2345,7 @@ def test_create_archive_with_archive_name_format_calls_borg_with_archive_name():
 def test_create_archive_with_archive_name_format_accepts_borg_placeholders():
     flexmock(module.borgmatic.logger).should_receive('add_custom_log_levels')
     flexmock(module.logging).ANSWER = module.borgmatic.logger.ANSWER
-    repository_archive_pattern = 'repo::Documents_{hostname}-{now}'
+    repository_archive_pattern = 'repo::Documents_{hostname}-{now}'  # noqa: FS003
     flexmock(module).should_receive('collect_borgmatic_source_directories').and_return([])
     flexmock(module).should_receive('deduplicate_directories').and_return(('foo', 'bar'))
     flexmock(module).should_receive('map_directories_to_devices').and_return({})
@@ -2380,7 +2380,7 @@ def test_create_archive_with_archive_name_format_accepts_borg_placeholders():
             'repositories': ['repo'],
             'exclude_patterns': None,
         },
-        storage_config={'archive_name_format': 'Documents_{hostname}-{now}'},
+        storage_config={'archive_name_format': 'Documents_{hostname}-{now}'},  # noqa: FS003
         local_borg_version='1.2.3',
     )
 
@@ -2388,7 +2388,7 @@ def test_create_archive_with_archive_name_format_accepts_borg_placeholders():
 def test_create_archive_with_repository_accepts_borg_placeholders():
     flexmock(module.borgmatic.logger).should_receive('add_custom_log_levels')
     flexmock(module.logging).ANSWER = module.borgmatic.logger.ANSWER
-    repository_archive_pattern = '{fqdn}::Documents_{hostname}-{now}'
+    repository_archive_pattern = '{fqdn}::Documents_{hostname}-{now}'  # noqa: FS003
     flexmock(module).should_receive('collect_borgmatic_source_directories').and_return([])
     flexmock(module).should_receive('deduplicate_directories').and_return(('foo', 'bar'))
     flexmock(module).should_receive('map_directories_to_devices').and_return({})
@@ -2417,13 +2417,13 @@ def test_create_archive_with_repository_accepts_borg_placeholders():
 
     module.create_archive(
         dry_run=False,
-        repository='{fqdn}',
+        repository='{fqdn}',  # noqa: FS003
         location_config={
             'source_directories': ['foo', 'bar'],
-            'repositories': ['{fqdn}'],
+            'repositories': ['{fqdn}'],  # noqa: FS003
             'exclude_patterns': None,
         },
-        storage_config={'archive_name_format': 'Documents_{hostname}-{now}'},
+        storage_config={'archive_name_format': 'Documents_{hostname}-{now}'},  # noqa: FS003
         local_borg_version='1.2.3',
     )
 
diff --git a/tests/unit/borg/test_prune.py b/tests/unit/borg/test_prune.py
index ed4101e..dd240dc 100644
--- a/tests/unit/borg/test_prune.py
+++ b/tests/unit/borg/test_prune.py
@@ -27,27 +27,39 @@ def test_make_prune_flags_returns_flags_from_config_plus_default_prefix_glob():
 
     result = module.make_prune_flags(retention_config, local_borg_version='1.2.3')
 
-    assert tuple(result) == BASE_PRUNE_FLAGS + (('--match-archives', 'sh:{hostname}-*'),)
+    assert tuple(result) == BASE_PRUNE_FLAGS + (
+        ('--match-archives', 'sh:{hostname}-*'),  # noqa: FS003
+    )
 
 
 def test_make_prune_flags_accepts_prefix_with_placeholders():
-    retention_config = OrderedDict((('keep_daily', 1), ('prefix', 'Documents_{hostname}-{now}')))
+    retention_config = OrderedDict(
+        (('keep_daily', 1), ('prefix', 'Documents_{hostname}-{now}'))  # noqa: FS003
+    )
     flexmock(module.feature).should_receive('available').and_return(True)
 
     result = module.make_prune_flags(retention_config, local_borg_version='1.2.3')
 
-    expected = (('--keep-daily', '1'), ('--match-archives', 'sh:Documents_{hostname}-{now}*'))
+    expected = (
+        ('--keep-daily', '1'),
+        ('--match-archives', 'sh:Documents_{hostname}-{now}*'),  # noqa: FS003
+    )
 
     assert tuple(result) == expected
 
 
 def test_make_prune_flags_with_prefix_without_borg_features_uses_glob_archives():
-    retention_config = OrderedDict((('keep_daily', 1), ('prefix', 'Documents_{hostname}-{now}')))
+    retention_config = OrderedDict(
+        (('keep_daily', 1), ('prefix', 'Documents_{hostname}-{now}'))  # noqa: FS003
+    )
     flexmock(module.feature).should_receive('available').and_return(False)
 
     result = module.make_prune_flags(retention_config, local_borg_version='1.2.3')
 
-    expected = (('--keep-daily', '1'), ('--glob-archives', 'Documents_{hostname}-{now}*'))
+    expected = (
+        ('--keep-daily', '1'),
+        ('--glob-archives', 'Documents_{hostname}-{now}*'),  # noqa: FS003
+    )
 
     assert tuple(result) == expected
 
diff --git a/tests/unit/config/test_environment.py b/tests/unit/config/test_environment.py
index b7b56dd..3e342fa 100644
--- a/tests/unit/config/test_environment.py
+++ b/tests/unit/config/test_environment.py
@@ -12,7 +12,7 @@ def test_env(monkeypatch):
 
 def test_env_braces(monkeypatch):
     monkeypatch.setenv('MY_CUSTOM_VALUE', 'foo')
-    config = {'key': 'Hello ${MY_CUSTOM_VALUE}'}
+    config = {'key': 'Hello ${MY_CUSTOM_VALUE}'}  # noqa: FS003
     module.resolve_env_variables(config)
     assert config == {'key': 'Hello foo'}
 
@@ -20,7 +20,7 @@ def test_env_braces(monkeypatch):
 def test_env_multi(monkeypatch):
     monkeypatch.setenv('MY_CUSTOM_VALUE', 'foo')
     monkeypatch.setenv('MY_CUSTOM_VALUE2', 'bar')
-    config = {'key': 'Hello ${MY_CUSTOM_VALUE}${MY_CUSTOM_VALUE2}'}
+    config = {'key': 'Hello ${MY_CUSTOM_VALUE}${MY_CUSTOM_VALUE2}'}  # noqa: FS003
     module.resolve_env_variables(config)
     assert config == {'key': 'Hello foobar'}
 
@@ -28,21 +28,21 @@ def test_env_multi(monkeypatch):
 def test_env_escape(monkeypatch):
     monkeypatch.setenv('MY_CUSTOM_VALUE', 'foo')
     monkeypatch.setenv('MY_CUSTOM_VALUE2', 'bar')
-    config = {'key': r'Hello ${MY_CUSTOM_VALUE} \${MY_CUSTOM_VALUE}'}
+    config = {'key': r'Hello ${MY_CUSTOM_VALUE} \${MY_CUSTOM_VALUE}'}  # noqa: FS003
     module.resolve_env_variables(config)
-    assert config == {'key': r'Hello foo ${MY_CUSTOM_VALUE}'}
+    assert config == {'key': r'Hello foo ${MY_CUSTOM_VALUE}'}  # noqa: FS003
 
 
 def test_env_default_value(monkeypatch):
     monkeypatch.delenv('MY_CUSTOM_VALUE', raising=False)
-    config = {'key': 'Hello ${MY_CUSTOM_VALUE:-bar}'}
+    config = {'key': 'Hello ${MY_CUSTOM_VALUE:-bar}'}  # noqa: FS003
     module.resolve_env_variables(config)
     assert config == {'key': 'Hello bar'}
 
 
 def test_env_unknown(monkeypatch):
     monkeypatch.delenv('MY_CUSTOM_VALUE', raising=False)
-    config = {'key': 'Hello ${MY_CUSTOM_VALUE}'}
+    config = {'key': 'Hello ${MY_CUSTOM_VALUE}'}  # noqa: FS003
     with pytest.raises(ValueError):
         module.resolve_env_variables(config)
 
@@ -55,20 +55,20 @@ def test_env_full(monkeypatch):
         'dict': {
             'key': 'value',
             'anotherdict': {
-                'key': 'My ${MY_CUSTOM_VALUE} here',
-                'other': '${MY_CUSTOM_VALUE}',
-                'escaped': r'\${MY_CUSTOM_VALUE}',
+                'key': 'My ${MY_CUSTOM_VALUE} here',  # noqa: FS003
+                'other': '${MY_CUSTOM_VALUE}',  # noqa: FS003
+                'escaped': r'\${MY_CUSTOM_VALUE}',  # noqa: FS003
                 'list': [
-                    '/home/${MY_CUSTOM_VALUE}/.local',
+                    '/home/${MY_CUSTOM_VALUE}/.local',  # noqa: FS003
                     '/var/log/',
-                    '/home/${MY_CUSTOM_VALUE2:-bar}/.config',
+                    '/home/${MY_CUSTOM_VALUE2:-bar}/.config',  # noqa: FS003
                 ],
             },
         },
         'list': [
-            '/home/${MY_CUSTOM_VALUE}/.local',
+            '/home/${MY_CUSTOM_VALUE}/.local',  # noqa: FS003
             '/var/log/',
-            '/home/${MY_CUSTOM_VALUE2-bar}/.config',
+            '/home/${MY_CUSTOM_VALUE2-bar}/.config',  # noqa: FS003
         ],
     }
     module.resolve_env_variables(config)
@@ -79,7 +79,7 @@ def test_env_full(monkeypatch):
             'anotherdict': {
                 'key': 'My foo here',
                 'other': 'foo',
-                'escaped': '${MY_CUSTOM_VALUE}',
+                'escaped': '${MY_CUSTOM_VALUE}',  # noqa: FS003
                 'list': ['/home/foo/.local', '/var/log/', '/home/bar/.config'],
             },
         },
diff --git a/tests/unit/config/test_validate.py b/tests/unit/config/test_validate.py
index 6a9f4a4..2852722 100644
--- a/tests/unit/config/test_validate.py
+++ b/tests/unit/config/test_validate.py
@@ -13,7 +13,7 @@ def test_format_json_error_path_element_formats_property():
 
 
 def test_format_json_error_formats_error_including_path():
-    flexmock(module).format_json_error_path_element = lambda element: '.{}'.format(element)
+    flexmock(module).format_json_error_path_element = lambda element: f'.{element}'
     error = flexmock(message='oops', path=['foo', 'bar'])
 
     assert module.format_json_error(error) == "At 'foo.bar': oops"
@@ -66,9 +66,9 @@ def test_apply_logical_validation_does_not_raise_if_archive_name_format_and_pref
     module.apply_logical_validation(
         'config.yaml',
         {
-            'storage': {'archive_name_format': '{hostname}-{now}'},
-            'retention': {'prefix': '{hostname}-'},
-            'consistency': {'prefix': '{hostname}-'},
+            'storage': {'archive_name_format': '{hostname}-{now}'},  # noqa: FS003
+            'retention': {'prefix': '{hostname}-'},  # noqa: FS003
+            'consistency': {'prefix': '{hostname}-'},  # noqa: FS003
         },
     )
 
diff --git a/tests/unit/hooks/test_command.py b/tests/unit/hooks/test_command.py
index 3d1686d..3a657eb 100644
--- a/tests/unit/hooks/test_command.py
+++ b/tests/unit/hooks/test_command.py
@@ -11,27 +11,20 @@ def test_interpolate_context_passes_through_command_without_variable():
 
 
 def test_interpolate_context_passes_through_command_with_unknown_variable():
-    assert (
-        module.interpolate_context('test.yaml', 'pre-backup', 'ls {baz}', {'foo': 'bar'})
-        == 'ls {baz}'
-    )
+    command = 'ls {baz}'  # noqa: FS003
+
+    assert module.interpolate_context('test.yaml', 'pre-backup', command, {'foo': 'bar'}) == command
 
 
 def test_interpolate_context_interpolates_variables():
+    command = 'ls {foo}{baz} {baz}'  # noqa: FS003
     context = {'foo': 'bar', 'baz': 'quux'}
 
     assert (
-        module.interpolate_context('test.yaml', 'pre-backup', 'ls {foo}{baz} {baz}', context)
-        == 'ls barquux quux'
+        module.interpolate_context('test.yaml', 'pre-backup', command, context) == 'ls barquux quux'
     )
 
 
-def test_interpolate_context_does_not_touch_unknown_variables():
-    context = {'foo': 'bar', 'baz': 'quux'}
-
-    assert module.interpolate_context('test.yaml', 'pre-backup', 'ls {wtf}', context) == 'ls {wtf}'
-
-
 def test_execute_hook_invokes_each_command():
     flexmock(module).should_receive('interpolate_context').replace_with(
         lambda config_file, hook_description, command, context: command
diff --git a/tests/unit/hooks/test_healthchecks.py b/tests/unit/hooks/test_healthchecks.py
index d577953..c975e4f 100644
--- a/tests/unit/hooks/test_healthchecks.py
+++ b/tests/unit/hooks/test_healthchecks.py
@@ -206,9 +206,7 @@ def test_ping_monitor_with_ping_uuid_hits_corresponding_url():
     payload = 'data'
     flexmock(module).should_receive('format_buffered_logs_for_payload').and_return(payload)
     flexmock(module.requests).should_receive('post').with_args(
-        'https://hc-ping.com/{}'.format(hook_config['ping_url']),
-        data=payload.encode('utf-8'),
-        verify=True,
+        f"https://hc-ping.com/{hook_config['ping_url']}", data=payload.encode('utf-8'), verify=True,
     ).and_return(flexmock(ok=True))
 
     module.ping_monitor(
diff --git a/tests/unit/hooks/test_mongodb.py b/tests/unit/hooks/test_mongodb.py
index f61f3c7..44e427f 100644
--- a/tests/unit/hooks/test_mongodb.py
+++ b/tests/unit/hooks/test_mongodb.py
@@ -17,7 +17,7 @@ def test_dump_databases_runs_mongodump_for_each_database():
 
     for name, process in zip(('foo', 'bar'), processes):
         flexmock(module).should_receive('execute_command').with_args(
-            ['mongodump', '--db', name, '--archive', '>', 'databases/localhost/{}'.format(name)],
+            ['mongodump', '--db', name, '--archive', '>', f'databases/localhost/{name}'],
             shell=True,
             run_to_completion=False,
         ).and_return(process).once()
diff --git a/tests/unit/hooks/test_postgresql.py b/tests/unit/hooks/test_postgresql.py
index 9cb4c0f..349c04b 100644
--- a/tests/unit/hooks/test_postgresql.py
+++ b/tests/unit/hooks/test_postgresql.py
@@ -134,7 +134,7 @@ def test_dump_databases_runs_pg_dump_for_each_database():
                 'custom',
                 name,
                 '>',
-                'databases/localhost/{}'.format(name),
+                f'databases/localhost/{name}',
             ),
             shell=True,
             extra_environment={'PGSSLMODE': 'disable'},