diff --git a/scripts/glibc_check.py b/scripts/glibc_check.py
index 02be4aac4..eb198ed56 100755
--- a/scripts/glibc_check.py
+++ b/scripts/glibc_check.py
@@ -41,7 +41,7 @@ def main():
             overall_versions.add(requires_glibc)
             if verbose:
                 print("%s %s" % (filename, format_version(requires_glibc)))
-        except subprocess.CalledProcessError as e:
+        except subprocess.CalledProcessError:
             if verbose:
                 print("%s errored." % filename)
 
diff --git a/setup.cfg b/setup.cfg
index 40ca52dba..c283992b3 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -5,7 +5,9 @@ python_files = testsuite/*.py
 # please note that the values are adjusted so that they do not cause failures
 # with existing code. if you want to change them, you should first fix all
 # flake8 failures that appear with your change.
-ignore = E122,E123,E125,E126,E127,E128,E226,E402,E722,E731,E741,F401,F405,F811
+ignore = E122,E123,E125,E126,E127,E128,E226,E402,E722,E731,E741,
+         F401,F405,F811,
+         W504
 # line length long term target: 120
 max-line-length = 255
 exclude = build,dist,.git,.idea,.cache,.tox,docs/conf.py
diff --git a/src/borg/archive.py b/src/borg/archive.py
index c22a655f7..cf8976428 100644
--- a/src/borg/archive.py
+++ b/src/borg/archive.py
@@ -758,7 +758,7 @@ Utilization of max. archive size: {csize_max:.0%}
         def fetch_async_response(wait=True):
             try:
                 return self.repository.async_response(wait=wait)
-            except Repository.ObjectNotFound as e:
+            except Repository.ObjectNotFound:
                 nonlocal error
                 # object not in repo - strange, but we wanted to delete it anyway.
                 if forced == 0:
@@ -1627,7 +1627,7 @@ class ArchiveChecker:
                                 yield Item(internal_dict=item)
                             else:
                                 report('Did not get expected metadata dict when unpacking item metadata (%s)' % reason, chunk_id, i)
-                    except msgpack.UnpackException as err:
+                    except msgpack.UnpackException:
                         report('Unpacker crashed while unpacking item metadata, trying to resync...', chunk_id, i)
                         unpacker.resync()
                     except Exception:
diff --git a/src/borg/archiver.py b/src/borg/archiver.py
index 2a775fe5a..1afd0a197 100644
--- a/src/borg/archiver.py
+++ b/src/borg/archiver.py
@@ -1978,7 +1978,7 @@ class Archiver:
 
         `Fnmatch <https://docs.python.org/3/library/fnmatch.html>`_, selector `fm:`
             This is the default style for ``--exclude`` and ``--exclude-from``.
-            These patterns use a variant of shell pattern syntax, with '\*' matching
+            These patterns use a variant of shell pattern syntax, with '\\*' matching
             any number of characters, '?' matching any single character, '[...]'
             matching any single character specified, including ranges, and '[!...]'
             matching any character not specified. For the purpose of these patterns,
@@ -1989,7 +1989,7 @@ class Archiver:
             from the start of the full path to just before a path separator. Except
             for the root path, paths will never end in the path separator when
             matching is attempted.  Thus, if a given pattern ends in a path
-            separator, a '\*' is appended before matching is attempted.
+            separator, a '\\*' is appended before matching is attempted.
 
         Shell-style patterns, selector `sh:`
             This is the default style for ``--pattern`` and ``--patterns-from``.
@@ -2064,7 +2064,7 @@ class Archiver:
 
             # The contents of directories in '/home' are not backed up when their name
             # ends in '.tmp'
-            $ borg create --exclude 're:^/home/[^/]+\.tmp/' backup /
+            $ borg create --exclude 're:^/home/[^/]+\\.tmp/' backup /
 
             # Load exclusions from file
             $ cat >exclude.txt <<EOF
@@ -2072,7 +2072,7 @@ class Archiver:
             /home/*/junk
             *.tmp
             fm:aa:something/*
-            re:^/home/[^/]\.tmp/
+            re:^/home/[^/]\\.tmp/
             sh:/home/*/.thumbnails
             EOF
             $ borg create --exclude-from exclude.txt backup /
@@ -3037,7 +3037,7 @@ class Archiver:
 
         The ``--exclude`` patterns are not like tar. In tar ``--exclude`` .bundler/gems will
         exclude foo/.bundler/gems. In borg it will not, you need to use ``--exclude``
-        '\*/.bundler/gems' to get the same effect. See ``borg help patterns`` for
+        '\\*/.bundler/gems' to get the same effect. See ``borg help patterns`` for
         more information.
 
         In addition to using ``--exclude`` patterns, it is possible to use
@@ -4074,7 +4074,7 @@ class Archiver:
 
         It creates input data below the given PATH and backups this data into the given REPO.
         The REPO must already exist (it could be a fresh empty repo or an existing repo, the
-        command will create / read / update / delete some archives named borg-test-data\* there.
+        command will create / read / update / delete some archives named borg-test-data\\* there.
 
         Make sure you have free space there, you'll need about 1GB each (+ overhead).
 
diff --git a/src/borg/crypto/nonces.py b/src/borg/crypto/nonces.py
index 39ec3d723..fe5abc547 100644
--- a/src/borg/crypto/nonces.py
+++ b/src/borg/crypto/nonces.py
@@ -36,7 +36,7 @@ class NonceManager:
     def get_repo_free_nonce(self):
         try:
             return self.repository.get_free_nonce()
-        except InvalidRPCMethod as error:
+        except InvalidRPCMethod:
             # old server version, suppress further calls
             sys.stderr.write("Please upgrade to borg version 1.1+ on the server for safer AES-CTR nonce handling.\n")
             self.get_repo_free_nonce = lambda: None
diff --git a/src/borg/helpers/parseformat.py b/src/borg/helpers/parseformat.py
index 148373673..a332509f1 100644
--- a/src/borg/helpers/parseformat.py
+++ b/src/borg/helpers/parseformat.py
@@ -414,9 +414,9 @@ class Location:
         return ', '.join(items)
 
     def to_key_filename(self):
-        name = re.sub('[^\w]', '_', self.path).strip('_')
+        name = re.sub(r'[^\w]', '_', self.path).strip('_')
         if self.proto != 'file':
-            name = re.sub('[^\w]', '_', self.host) + '__' + name
+            name = re.sub(r'[^\w]', '_', self.host) + '__' + name
         if len(name) > 100:
             # Limit file names to some reasonable length. Most file systems
             # limit them to 255 [unit of choice]; due to variations in unicode
diff --git a/src/borg/testsuite/__init__.py b/src/borg/testsuite/__init__.py
index 465e24fa1..caa7d2a22 100644
--- a/src/borg/testsuite/__init__.py
+++ b/src/borg/testsuite/__init__.py
@@ -111,7 +111,7 @@ def is_utime_fully_supported():
             new_stats = os.stat(filepath, follow_symlinks=False)
             if new_stats.st_atime == 1000 and new_stats.st_mtime == 2000:
                 return True
-        except OSError as err:
+        except OSError:
             pass
         return False
 
@@ -133,7 +133,7 @@ def is_birthtime_fully_supported():
             new_stats = os.stat(filepath, follow_symlinks=False)
             if new_stats.st_birthtime == birthtime and new_stats.st_mtime == mtime and new_stats.st_atime == atime:
                 return True
-        except OSError as err:
+        except OSError:
             pass
         return False
 
diff --git a/src/borg/testsuite/key.py b/src/borg/testsuite/key.py
index 1046e1ad1..1d6281056 100644
--- a/src/borg/testsuite/key.py
+++ b/src/borg/testsuite/key.py
@@ -35,7 +35,7 @@ class TestKey:
         /cXJq7jrqmrJ1phd6dg4SHAM/i+hubadZoS6m25OQzYAW09wZD/phG8OVa698Z5ed3HTaT
         SmrtgJL3EoOKgUI9d6BLE4dJdBqntifo""".strip()
 
-    keyfile2_cdata = unhexlify(re.sub('\W', '', """
+    keyfile2_cdata = unhexlify(re.sub(r'\W', '', """
         0055f161493fcfc16276e8c31493c4641e1eb19a79d0326fad0291e5a9c98e5933
         00000000000003e8d21eaf9b86c297a8cd56432e1915bb
         """))
diff --git a/src/borg/testsuite/patterns.py b/src/borg/testsuite/patterns.py
index ff447888f..5806ff69b 100644
--- a/src/borg/testsuite/patterns.py
+++ b/src/borg/testsuite/patterns.py
@@ -229,13 +229,13 @@ def test_invalid_unicode_pattern(pattern):
       "",
       "# EOF"],
      ["/more/data", "/home", " #/wsfoobar"]),
-    (["re:.*"], []),
-    (["re:\s"], ["/data/something00.txt", "/more/data", "/home"]),
+    ([r"re:.*"], []),
+    ([r"re:\s"], ["/data/something00.txt", "/more/data", "/home"]),
     ([r"re:(.)(\1)"], ["/more/data", "/home", "\tstart/whitespace", "/whitespace/end\t"]),
     (["", "", "",
       "# This is a test with mixed pattern styles",
       # Case-insensitive pattern
-      "re:(?i)BAR|ME$",
+      r"re:(?i)BAR|ME$",
       "",
       "*whitespace*",
       "fm:*/something00*"],