diff --git a/analyzer/codechecker_analyzer/analyzers/cppcheck/analyzer.py b/analyzer/codechecker_analyzer/analyzers/cppcheck/analyzer.py
index fe57f069a1..9b7bc4e58a 100644
--- a/analyzer/codechecker_analyzer/analyzers/cppcheck/analyzer.py
+++ b/analyzer/codechecker_analyzer/analyzers/cppcheck/analyzer.py
@@ -311,7 +311,7 @@ def post_analyze(self, result_handler):
             try:
                 shutil.copy2(cppcheck_out, codechecker_out)
                 Path(cppcheck_out).rename(str(cppcheck_out) + ".bak")
-            except(OSError) as e:
+            except (OSError) as e:
                 LOG.error(e.errno)
 
     @classmethod
diff --git a/analyzer/codechecker_analyzer/analyzers/gcc/result_handler.py b/analyzer/codechecker_analyzer/analyzers/gcc/result_handler.py
index c5aa72d8bd..2408017083 100644
--- a/analyzer/codechecker_analyzer/analyzers/gcc/result_handler.py
+++ b/analyzer/codechecker_analyzer/analyzers/gcc/result_handler.py
@@ -96,7 +96,7 @@ def postprocess_result(
         # unintentionally parse them, so we rename them.
         try:
             shutil.move(gcc_dest_file_name, gcc_dest_file_name + '.bak')
-        except(OSError) as e:
+        except (OSError) as e:
             LOG.error(e)
 
         for report in reports:
diff --git a/analyzer/requirements_py/dev/requirements.txt b/analyzer/requirements_py/dev/requirements.txt
index 894b4c6fc7..3089b72601 100644
--- a/analyzer/requirements_py/dev/requirements.txt
+++ b/analyzer/requirements_py/dev/requirements.txt
@@ -1,5 +1,5 @@
 pytest==7.3.1
-pycodestyle==2.7.0
+pycodestyle==2.12.0
 pylint==2.8.2
 mkdocs==1.5.3
 coverage==5.5.0
diff --git a/analyzer/tools/build-logger/requirements_py/dev/requirements.txt b/analyzer/tools/build-logger/requirements_py/dev/requirements.txt
index dea2d59c92..ab2e19281b 100644
--- a/analyzer/tools/build-logger/requirements_py/dev/requirements.txt
+++ b/analyzer/tools/build-logger/requirements_py/dev/requirements.txt
@@ -1,3 +1,3 @@
 pytest==7.3.1
-pycodestyle==2.4.0
+pycodestyle==2.12.0
 pylint==2.8.2
diff --git a/analyzer/tools/merge_clang_extdef_mappings/requirements_py/dev/requirements.txt b/analyzer/tools/merge_clang_extdef_mappings/requirements_py/dev/requirements.txt
index dea2d59c92..ab2e19281b 100644
--- a/analyzer/tools/merge_clang_extdef_mappings/requirements_py/dev/requirements.txt
+++ b/analyzer/tools/merge_clang_extdef_mappings/requirements_py/dev/requirements.txt
@@ -1,3 +1,3 @@
 pytest==7.3.1
-pycodestyle==2.4.0
+pycodestyle==2.12.0
 pylint==2.8.2
diff --git a/analyzer/tools/statistics_collector/requirements_py/dev/requirements.txt b/analyzer/tools/statistics_collector/requirements_py/dev/requirements.txt
index dea2d59c92..ab2e19281b 100644
--- a/analyzer/tools/statistics_collector/requirements_py/dev/requirements.txt
+++ b/analyzer/tools/statistics_collector/requirements_py/dev/requirements.txt
@@ -1,3 +1,3 @@
 pytest==7.3.1
-pycodestyle==2.4.0
+pycodestyle==2.12.0
 pylint==2.8.2
diff --git a/scripts/test/add_new_unit_test.py b/scripts/test/add_new_unit_test.py
index 69c9ee02e8..f5680dfc0d 100755
--- a/scripts/test/add_new_unit_test.py
+++ b/scripts/test/add_new_unit_test.py
@@ -32,7 +32,7 @@ def main():
         print("Unit test already exists: " + new_test)
         sys.exit(1)
 
-    template = os.path.join(unit_test_path, 'unit_template.py')
+    template = os.path.join(unit_test_path, 'unit_test.template')
 
     with open(template, 'r', encoding="utf-8", errors="ignore") as init:
         new_test_content = init.read()
diff --git a/tools/bazel/requirements_py/dev/requirements.txt b/tools/bazel/requirements_py/dev/requirements.txt
index a9f7c470cd..f0492af5b4 100644
--- a/tools/bazel/requirements_py/dev/requirements.txt
+++ b/tools/bazel/requirements_py/dev/requirements.txt
@@ -1,4 +1,4 @@
 pytest==7.3.1
-pycodestyle==2.7.0
+pycodestyle==2.12.0
 pylint==2.8.2
 mypy==1.7.1
diff --git a/tools/report-converter/requirements_py/dev/requirements.txt b/tools/report-converter/requirements_py/dev/requirements.txt
index 15920d1699..b24aab957a 100644
--- a/tools/report-converter/requirements_py/dev/requirements.txt
+++ b/tools/report-converter/requirements_py/dev/requirements.txt
@@ -1,6 +1,6 @@
 pytest==7.3.1
 sarif-tools==1.0.0
-pycodestyle==2.7.0
+pycodestyle==2.12.0
 pylint==2.8.2
 portalocker==2.2.1
 mypy==1.7.1
diff --git a/tools/tu_collector/requirements_py/dev/requirements.txt b/tools/tu_collector/requirements_py/dev/requirements.txt
index a9f7c470cd..f0492af5b4 100644
--- a/tools/tu_collector/requirements_py/dev/requirements.txt
+++ b/tools/tu_collector/requirements_py/dev/requirements.txt
@@ -1,4 +1,4 @@
 pytest==7.3.1
-pycodestyle==2.7.0
+pycodestyle==2.12.0
 pylint==2.8.2
 mypy==1.7.1
diff --git a/web/client/codechecker_client/credential_manager.py b/web/client/codechecker_client/credential_manager.py
index 2f08c28174..2946463c84 100644
--- a/web/client/codechecker_client/credential_manager.py
+++ b/web/client/codechecker_client/credential_manager.py
@@ -20,8 +20,8 @@
 from codechecker_common.logger import get_logger
 from codechecker_common.util import load_json
 
-from codechecker_web.shared.env import check_file_owner_rw, get_password_file,\
-    get_session_file
+from codechecker_web.shared.env import check_file_owner_rw, \
+    get_password_file, get_session_file
 from codechecker_web.shared.version import SESSION_COOKIE_NAME as _SCN
 
 LOG = get_logger('system')
diff --git a/web/requirements_py/dev/requirements.txt b/web/requirements_py/dev/requirements.txt
index f177a0589c..5674ba6558 100644
--- a/web/requirements_py/dev/requirements.txt
+++ b/web/requirements_py/dev/requirements.txt
@@ -1,4 +1,4 @@
-pycodestyle==2.7.0
+pycodestyle==2.12.0
 psycopg2-binary==2.8.6
 pg8000==1.15.2
 pylint==2.8.2
diff --git a/web/server/tests/unit/unit_template.py b/web/server/tests/unit/unit_test.template
similarity index 100%
rename from web/server/tests/unit/unit_template.py
rename to web/server/tests/unit/unit_test.template