diff --git a/tools/audit-gradle.py b/tools/audit-gradle.py
index a001d3c64f..01c49a52b0 100755
--- a/tools/audit-gradle.py
+++ b/tools/audit-gradle.py
@@ -1,19 +1,19 @@
 #!/usr/bin/env python3
 
-
 import os
 import re
 import sys
 
 # find all repositories that use plain HTTP urls (e.g. not HTTPS)
-url_pattern = re.compile('repositories\s*{[^}]*http://(?:[a-zA-Z]|[0-9]|[$-_@.&+]|[!*\(\),]|(?:%[0-9a-fA-F][0-9a-fA-F]))+[^}]*}', re.DOTALL)
+url_pattern = re.compile(
+    r'repositories\s*{[^}]*http://(?:[a-zA-Z]|[0-9]|[$-_@.&+]|[!*(),]|%[0-9a-fA-F][0-9a-fA-F])+[^}]*}', re.DOTALL)
 
 exit_value = 0
 for appid in sys.argv:
-    gitdir = os.path.join('build', appid)
-    if not os.path.isdir(gitdir):
+    git_dir = os.path.join('build', appid)
+    if not os.path.isdir(git_dir):
         continue
-    for root, dirs, files in os.walk(gitdir):
+    for root, dirs, files in os.walk(git_dir):
         for f in files:
             if f.endswith('.gradle'):
                 path = os.path.join(root, f)
diff --git a/tools/build-contains-signatures.py b/tools/build-contains-signatures.py
index fc70cab088..32ae795b88 100755
--- a/tools/build-contains-signatures.py
+++ b/tools/build-contains-signatures.py
@@ -2,9 +2,8 @@
 
 import glob
 import os
-import subprocess
 import sys
-import yaml
+
 from colorama import Fore, Style
 
 if len(sys.argv) != 2:
@@ -28,7 +27,6 @@ if not glob.glob('unsigned/%s_%s.apk' % (appid, versionCode)):
     print('no unsigned APK found, skipping publish')
     exit(1)
 
-
 print(
     Fore.GREEN
     + ('Found signatures for %s, running publish...' % sys.argv[1])
diff --git a/tools/check-for-unattached-signatures.py b/tools/check-for-unattached-signatures.py
index 03dd226ebb..a561a9f04a 100755
--- a/tools/check-for-unattached-signatures.py
+++ b/tools/check-for-unattached-signatures.py
@@ -7,6 +7,7 @@
 
 import glob
 import os
+
 import yaml
 
 errors = 0
diff --git a/tools/check-git-repo-availability.py b/tools/check-git-repo-availability.py
index 8239b9baef..fa42055c56 100755
--- a/tools/check-git-repo-availability.py
+++ b/tools/check-git-repo-availability.py
@@ -5,8 +5,10 @@ import os
 import re
 import subprocess
 import sys
+
 import yaml
 from colorama import Fore, Style
+
 try:
     from yaml import CSafeLoader as SafeLoader
 except ImportError:
@@ -91,7 +93,7 @@ for f in files:
                     fp.write("\nNoSourceSince: %s" % versionName)
                 fp.write('\n')
 
-errorcount = len(errors)
-if errorcount > 0:
-    print(Fore.RED + '\nFound', errorcount, 'errors.' + Style.RESET_ALL)
-sys.exit(errorcount)
+error_count = len(errors)
+if error_count > 0:
+    print(Fore.RED + '\nFound', error_count, 'errors.' + Style.RESET_ALL)
+sys.exit(error_count)
diff --git a/tools/check-keyalias-collision.py b/tools/check-keyalias-collision.py
index 7c93e37083..fb36c464b4 100755
--- a/tools/check-keyalias-collision.py
+++ b/tools/check-keyalias-collision.py
@@ -6,22 +6,24 @@ import inspect
 import os
 import sys
 
+
 def generate_keyalias(s):
     m = hashlib.md5()
     m.update(s.encode())
     return m.hexdigest()[:8]
 
+
 base = os.path.realpath(
     os.path.join(os.path.dirname(inspect.getfile(inspect.currentframe())), '..'))
-metadatafiles = sorted(glob.glob(base + '/metadata/*.txt')
-                       + glob.glob(base + '/metadata/*.yml'))
+metadata_files = sorted(glob.glob(base + '/metadata/*.txt')
+                        + glob.glob(base + '/metadata/*.yml'))
 
-if not metadatafiles:
+if not metadata_files:
     print('No metadata files found!')
     sys.exit(1)
 
 keyaliases = dict()
-for f in metadatafiles:
+for f in metadata_files:
     appid = os.path.basename(f)[:-4]
     keyalias = generate_keyalias(appid)
     if keyalias in keyaliases:
diff --git a/tools/check-metadata-summary-whitespace.py b/tools/check-metadata-summary-whitespace.py
index 8bb9f23764..28eab4ebd1 100755
--- a/tools/check-metadata-summary-whitespace.py
+++ b/tools/check-metadata-summary-whitespace.py
@@ -5,7 +5,7 @@ import os
 
 os.chdir(os.path.join(os.path.dirname(__file__), '..'))
 
-for f in glob.glob('metadata/*/*/*.txt') +  glob.glob('metadata/*/*/*/*.txt'):
+for f in glob.glob('metadata/*/*/*.txt') + glob.glob('metadata/*/*/*/*.txt'):
     if os.path.getsize(f) == 0:
         os.remove(f)
         continue
diff --git a/tools/find-changed-builds.py b/tools/find-changed-builds.py
index e98a88bc85..42947a66b7 100755
--- a/tools/find-changed-builds.py
+++ b/tools/find-changed-builds.py
@@ -3,6 +3,7 @@
 import os
 import subprocess
 import sys
+
 import yaml
 from colorama import Fore, Style
 
@@ -13,7 +14,7 @@ for appid in sorted(changed):
     metadata_file = 'metadata/%s.yml' % appid
     diff = subprocess.check_output(
         (
-            'git diff --no-color --diff-filter=d FETCH_HEAD...HEAD -- ' + metadata_file
+                'git diff --no-color --diff-filter=d FETCH_HEAD...HEAD -- ' + metadata_file
         ).split(' ')
     )
 
@@ -70,7 +71,7 @@ for appid in sorted(changed):
     signatures_dir = 'metadata/%s/signatures/' % appid
     diff = subprocess.check_output(
         (
-            'git diff --name-only --no-color --diff-filter=d FETCH_HEAD...HEAD -- ' + signatures_dir
+                'git diff --name-only --no-color --diff-filter=d FETCH_HEAD...HEAD -- ' + signatures_dir
         ).split(' ')
     )
     for f in diff.split():
diff --git a/tools/make-summary-translatable.py b/tools/make-summary-translatable.py
index ff520adc7c..157a2a3d8e 100755
--- a/tools/make-summary-translatable.py
+++ b/tools/make-summary-translatable.py
@@ -3,6 +3,7 @@
 import glob
 import os
 import re
+
 import yaml
 
 os.chdir(os.path.dirname(__file__) + '/../')
@@ -13,7 +14,7 @@ for f in glob.glob('metadata/*.yml'):
         data = yaml.load(raw)
     archive_policy = data.get('ArchivePolicy')
     if 'Disabled' not in data and 'Summary' in data \
-       and (archive_policy is None or not archive_policy.startswith('0 ')):
+            and (archive_policy is None or not archive_policy.startswith('0 ')):
         en_US_dir = f[:-4] + '/en-US/'
         os.makedirs(en_US_dir, exist_ok=True)
         with open(en_US_dir + '/summary.txt', 'w') as fp:
diff --git a/tools/rewrite-git-redirects.py b/tools/rewrite-git-redirects.py
index 51c6378b3c..d40552c994 100755
--- a/tools/rewrite-git-redirects.py
+++ b/tools/rewrite-git-redirects.py
@@ -8,6 +8,7 @@ import glob
 import os
 import re
 import sys
+
 import yaml
 
 os.chdir(os.path.dirname(__file__) + '/../')
diff --git a/tools/schedule-issuebot.py b/tools/schedule-issuebot.py
index 7f8b1d12f1..34503bc5a2 100755
--- a/tools/schedule-issuebot.py
+++ b/tools/schedule-issuebot.py
@@ -1,16 +1,17 @@
 #!/usr/bin/env python3
 
-import gitlab
 import json
 import os
 import pprint
 import re
 import subprocess
 
+import gitlab
+
 os.chdir(os.path.join(os.path.dirname(__file__), '..'))
 
 private_token = os.getenv('PERSONAL_ACCESS_TOKEN')
-gl = gitlab.Gitlab('https://gitlab.com', api_version=4, private_token=private_token)
+gl = gitlab.Gitlab('https://gitlab.com', private_token=private_token)
 project = gl.projects.get(os.getenv('CI_PROJECT_PATH'), lazy=True)
 
 TRIGGER_COMMIT_PAT = re.compile(r'<tt>([0-9a-f]{40})</tt>')