diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 2d458874..42832de3 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -22,14 +22,13 @@ jobs:
         pip install flake8 pytest
         pip install -r requirements.txt
         pip install -r requirements-test.txt
-#    - name: Lint with flake8
-#      run: |
-#        # stop the build if there are Python syntax errors or undefined names
-#        flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
-#        # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
-#        flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
-#    - name: Set up Eslint
-#      uses: stefanoeb/eslint-action@1.0.2
+    - name: Lint with flake8
+      run: |
+        # stop the build if there are Python syntax errors or undefined names
+        flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
+        # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide.
+        # TODO: Delete W503 from ignore after refactoring and change max-complexity into 10
+        flake8 . --count --exit-zero --max-complexity=15 --max-line-length=127 --ignore=I201,I101,I100,R504,A003,I202,SC200,E800,W505,SC100,E402,R504,W503 --statistics --exclude=.git,__pycache__,docs/source/conf.py,old,build,dist,venv,test/resources,.eggs,review.egg-info,.pytest_cache,node_modules
     - name: Set up Eslint
       run: |
         npm install eslint --save-dev
diff --git a/src/python/__init__.py b/src/python/__init__.py
index e02af948..496da56c 100644
--- a/src/python/__init__.py
+++ b/src/python/__init__.py
@@ -1,3 +1,3 @@
 from pathlib import Path
 
-MAIN_FOLDER = Path(__file__)
\ No newline at end of file
+MAIN_FOLDER = Path(__file__)
diff --git a/src/python/review/inspectors/checkstyle/checkstyle.py b/src/python/review/inspectors/checkstyle/checkstyle.py
index 5333e15c..389d889f 100644
--- a/src/python/review/inspectors/checkstyle/checkstyle.py
+++ b/src/python/review/inspectors/checkstyle/checkstyle.py
@@ -67,6 +67,6 @@ def choose_issue_type(cls, check_class: str) -> IssueType:
         issue_type = CHECK_CLASS_NAME_TO_ISSUE_TYPE.get(check_class_name)
         if not issue_type:
             logger.warning('Checkstyle: %s - unknown check class' % check_class_name)
-            issue_type = IssueType.BEST_PRACTICES
+            return IssueType.BEST_PRACTICES
 
         return issue_type
diff --git a/src/python/review/inspectors/detekt/detekt.py b/src/python/review/inspectors/detekt/detekt.py
index 09461e6c..2c2b197e 100644
--- a/src/python/review/inspectors/detekt/detekt.py
+++ b/src/python/review/inspectors/detekt/detekt.py
@@ -47,17 +47,15 @@ def inspect(self, path: Path, config) -> List[BaseIssue]:
             command = self._create_command(path, output_path)
 
             run_in_subprocess(command)
-            issues = parse_checkstyle_file_result(output_path,
-                                                  self.inspector_type,
-                                                  self.choose_issue_type,
-                                                  self.origin_class_to_pattern)
-
-            return issues
+            return parse_checkstyle_file_result(output_path,
+                                                self.inspector_type,
+                                                self.choose_issue_type,
+                                                self.origin_class_to_pattern)
 
     @classmethod
     def choose_issue_type(cls, issue_class: str) -> IssueType:
         issue_type = DETECT_CLASS_NAME_TO_ISSUE_TYPE.get(issue_class)
         if not issue_type:
             logger.info(f'{cls.inspector_type.value}: {issue_class} - unknown origin class')
-            issue_type = IssueType.BEST_PRACTICES
+            return IssueType.BEST_PRACTICES
         return issue_type
diff --git a/src/python/review/inspectors/flake8/flake8.py b/src/python/review/inspectors/flake8/flake8.py
index 91ba9bb9..d538c3a4 100644
--- a/src/python/review/inspectors/flake8/flake8.py
+++ b/src/python/review/inspectors/flake8/flake8.py
@@ -74,6 +74,6 @@ def choose_issue_type(code: str) -> IssueType:
         issue_type = CODE_PREFIX_TO_ISSUE_TYPE.get(code_prefix)
         if not issue_type:
             logger.warning(f'flake8: {code} - unknown error code')
-            issue_type = IssueType.BEST_PRACTICES
+            return IssueType.BEST_PRACTICES
 
         return issue_type
diff --git a/src/python/review/inspectors/intellij/intellij.py b/src/python/review/inspectors/intellij/intellij.py
index 6a1b0c59..7a224934 100644
--- a/src/python/review/inspectors/intellij/intellij.py
+++ b/src/python/review/inspectors/intellij/intellij.py
@@ -16,9 +16,7 @@
 
 INTELLIJ_INSPECTOR_EXECUTABLE = os.environ.get('INTELLIJ_INSPECTOR_EXECUTABLE')
 INTELLIJ_INSPECTOR_PROJECT = Path(__file__).parent / 'project'
-INTELLIJ_INSPECTOR_SETTINGS = (
-        INTELLIJ_INSPECTOR_PROJECT / '.idea' / 'inspectionProfiles' / 'custom_profiles.xml'
-)
+INTELLIJ_INSPECTOR_SETTINGS = (INTELLIJ_INSPECTOR_PROJECT / '.idea' / 'inspectionProfiles' / 'custom_profiles.xml')
 
 PYTHON_FOLDER = 'python_sources'
 JAVA_FOLDER = 'java_sources/src'
@@ -61,7 +59,6 @@ def inspect(self, path: Path, config: dict) -> List[BaseIssue]:
                 command = self.create_command(temp_dir)
                 run_in_subprocess(command)
                 issues = self.parse(temp_dir, path_in_project_to_origin_path)
-
         finally:
             for file_path_in_project in path_in_project_to_origin_path:
                 file_path_in_project.unlink()
diff --git a/src/python/review/inspectors/pmd/pmd.py b/src/python/review/inspectors/pmd/pmd.py
index d060ae11..227169fc 100644
--- a/src/python/review/inspectors/pmd/pmd.py
+++ b/src/python/review/inspectors/pmd/pmd.py
@@ -76,6 +76,6 @@ def choose_issue_type(cls, rule: str) -> IssueType:
         if not issue_type:
             logger.warning('%s: %s - unknown rule' %
                            (cls.inspector_type.value, rule))
-            issue_type = IssueType.BEST_PRACTICES
+            return IssueType.BEST_PRACTICES
 
         return issue_type
diff --git a/src/python/review/inspectors/pyast/python_ast.py b/src/python/review/inspectors/pyast/python_ast.py
index 78f7f052..1cd28b89 100644
--- a/src/python/review/inspectors/pyast/python_ast.py
+++ b/src/python/review/inspectors/pyast/python_ast.py
@@ -111,9 +111,9 @@ class PythonAstInspector(BaseInspector):
     @classmethod
     def inspect(cls, path: Path, config: dict) -> List[BaseIssue]:
         if path.is_file():
-            root_path, path_to_files = path.parent, [path]
+            path_to_files = [path]
         else:
-            root_path, path_to_files = path, get_all_file_paths_in_dir(path)
+            path_to_files = get_all_file_paths_in_dir(path)
 
         path_to_files = language.filter_paths(path_to_files, Language.PYTHON)
 
diff --git a/src/python/review/inspectors/pylint/pylint.py b/src/python/review/inspectors/pylint/pylint.py
index 8b8ea597..fb9db581 100644
--- a/src/python/review/inspectors/pylint/pylint.py
+++ b/src/python/review/inspectors/pylint/pylint.py
@@ -1,7 +1,7 @@
 import logging
 import re
 from pathlib import Path
-from typing import List
+from typing import List, Optional
 
 from src.python.review.common.subprocess_runner import run_in_subprocess
 from src.python.review.inspectors.base_inspector import BaseInspector
@@ -80,9 +80,9 @@ def choose_issue_type(code: str) -> IssueType:
         if code in CODE_TO_ISSUE_TYPE:
             return CODE_TO_ISSUE_TYPE[code]
 
-        issue_type = CATEGORY_TO_ISSUE_TYPE.get(code[0])
+        issue_type: Optional[IssueType] = CATEGORY_TO_ISSUE_TYPE.get(code[0])
         if not issue_type:
             logger.warning(f'pylint: {code} - unknown error category')
-            issue_type = IssueType.BEST_PRACTICES
+            return IssueType.BEST_PRACTICES
 
         return issue_type
diff --git a/src/python/review/inspectors/springlint/springlint.py b/src/python/review/inspectors/springlint/springlint.py
index 56c46761..97502c20 100644
--- a/src/python/review/inspectors/springlint/springlint.py
+++ b/src/python/review/inspectors/springlint/springlint.py
@@ -9,7 +9,8 @@
 from src.python.review.common.subprocess_runner import run_in_subprocess
 from src.python.review.inspectors.base_inspector import BaseInspector
 from src.python.review.inspectors.inspector_type import InspectorType
-from src.python.review.inspectors.issue import BaseIssue, ChildrenNumberIssue, ClassResponseIssue, CodeIssue, CohesionIssue, \
+from src.python.review.inspectors.issue import BaseIssue, ChildrenNumberIssue, ClassResponseIssue, CodeIssue, \
+    CohesionIssue, \
     CouplingIssue, InheritanceIssue, IssueType, MethodNumberIssue, WeightedMethodIssue
 from src.python.review.inspectors.tips import get_child_number_tip, get_class_coupling_tip, get_class_response_tip, \
     get_cohesion_tip, get_inheritance_depth_tip, get_method_number_tip, get_weighted_method_tip
diff --git a/src/python/review/inspectors/tips.py b/src/python/review/inspectors/tips.py
index df548522..c1d3fba1 100644
--- a/src/python/review/inspectors/tips.py
+++ b/src/python/review/inspectors/tips.py
@@ -31,8 +31,8 @@ def add_complexity_tip(description: str) -> str:
 
 
 def get_inheritance_depth_tip() -> str:
-    return 'Too deep inheritance tree is complicated to understand. '\
-            'Try to reduce it (maybe you should use a composition instead).'
+    return 'Too deep inheritance tree is complicated to understand. ' \
+           'Try to reduce it (maybe you should use a composition instead).'
 
 
 # This issue will not be reported at this version
diff --git a/src/python/review/logging_config.py b/src/python/review/logging_config.py
index 1ad1cef1..ce3c47a0 100644
--- a/src/python/review/logging_config.py
+++ b/src/python/review/logging_config.py
@@ -1,6 +1,5 @@
 import sys
 
-
 logging_config = {
     'version': 1,
     'formatters': {
diff --git a/src/python/review/quality/evaluate_quality.py b/src/python/review/quality/evaluate_quality.py
index 77434423..8e260d2a 100644
--- a/src/python/review/quality/evaluate_quality.py
+++ b/src/python/review/quality/evaluate_quality.py
@@ -6,22 +6,28 @@
 from src.python.review.quality.rules.best_practices_scoring import (
     BestPracticesRule, LANGUAGE_TO_BEST_PRACTICES_RULE_CONFIG
 )
-from src.python.review.quality.rules.boolean_length_scoring import BooleanExpressionRule, LANGUAGE_TO_BOOLEAN_EXPRESSION_RULE_CONFIG
+from src.python.review.quality.rules.boolean_length_scoring import BooleanExpressionRule, \
+    LANGUAGE_TO_BOOLEAN_EXPRESSION_RULE_CONFIG
 from src.python.review.quality.rules.class_response_scoring import LANGUAGE_TO_RESPONSE_RULE_CONFIG, ResponseRule
 from src.python.review.quality.rules.code_style_scoring import CodeStyleRule, LANGUAGE_TO_CODE_STYLE_RULE_CONFIG
 from src.python.review.quality.rules.coupling_scoring import CouplingRule, LANGUAGE_TO_COUPLING_RULE_CONFIG
-from src.python.review.quality.rules.cyclomatic_complexity_scoring import CyclomaticComplexityRule, LANGUAGE_TO_CYCLOMATIC_COMPLEXITY_RULE_CONFIG
+from src.python.review.quality.rules.cyclomatic_complexity_scoring import CyclomaticComplexityRule, \
+    LANGUAGE_TO_CYCLOMATIC_COMPLEXITY_RULE_CONFIG
 from src.python.review.quality.rules.error_prone_scoring import ErrorProneRule, LANGUAGE_TO_ERROR_PRONE_RULE_CONFIG
-from src.python.review.quality.rules.function_length_scoring import FunctionLengthRule, LANGUAGE_TO_FUNCTION_LENGTH_RULE_CONFIG
-from src.python.review.quality.rules.inheritance_depth_scoring import InheritanceDepthRule, LANGUAGE_TO_INHERITANCE_DEPTH_RULE_CONFIG
+from src.python.review.quality.rules.function_length_scoring import FunctionLengthRule, \
+    LANGUAGE_TO_FUNCTION_LENGTH_RULE_CONFIG
+from src.python.review.quality.rules.inheritance_depth_scoring import InheritanceDepthRule, \
+    LANGUAGE_TO_INHERITANCE_DEPTH_RULE_CONFIG
 from src.python.review.quality.rules.line_len_scoring import LANGUAGE_TO_LINE_LENGTH_RULE_CONFIG, LineLengthRule
-from src.python.review.quality.rules.method_number_scoring import LANGUAGE_TO_METHOD_NUMBER_RULE_CONFIG, MethodNumberRule
-from src.python.review.quality.rules.weighted_methods_scoring import LANGUAGE_TO_WEIGHTED_METHODS_RULE_CONFIG, WeightedMethodsRule
+from src.python.review.quality.rules.method_number_scoring import LANGUAGE_TO_METHOD_NUMBER_RULE_CONFIG, \
+    MethodNumberRule
+from src.python.review.quality.rules.weighted_methods_scoring import LANGUAGE_TO_WEIGHTED_METHODS_RULE_CONFIG, \
+    WeightedMethodsRule
 from src.python.review.reviewers.utils.code_statistics import CodeStatistics
 
 
 def get_statistics(statistics: CodeStatistics) -> Dict[IssueType, int]:
-    rule_type_counter = {
+    return {
         IssueType.CODE_STYLE:
             statistics.code_style_lines,
 
@@ -58,7 +64,6 @@ def get_statistics(statistics: CodeStatistics) -> Dict[IssueType, int]:
         IssueType.WEIGHTED_METHOD:
             statistics.weighted_method_complexities
     }
-    return rule_type_counter
 
 
 def evaluate_quality(statistics: CodeStatistics, language: Language) -> Quality:
diff --git a/src/python/review/quality/rules/best_practices_scoring.py b/src/python/review/quality/rules/best_practices_scoring.py
index 2e9a3343..f014d6e8 100644
--- a/src/python/review/quality/rules/best_practices_scoring.py
+++ b/src/python/review/quality/rules/best_practices_scoring.py
@@ -1,10 +1,9 @@
-from typing import Optional
-
 from dataclasses import dataclass
+from typing import Optional
 
-from src.python.review.quality.model import QualityType, Rule
-from src.python.review.inspectors.issue import IssueType
 from src.python.review.common.language import Language
+from src.python.review.inspectors.issue import IssueType
+from src.python.review.quality.model import QualityType, Rule
 
 
 @dataclass
diff --git a/src/python/review/quality/rules/boolean_length_scoring.py b/src/python/review/quality/rules/boolean_length_scoring.py
index 16f3439e..b2d7c347 100644
--- a/src/python/review/quality/rules/boolean_length_scoring.py
+++ b/src/python/review/quality/rules/boolean_length_scoring.py
@@ -1,10 +1,9 @@
-from typing import Optional
-
 from dataclasses import dataclass
+from typing import Optional
 
-from src.python.review.quality.model import QualityType, Rule
-from src.python.review.inspectors.issue import IssueType
 from src.python.review.common.language import Language
+from src.python.review.inspectors.issue import IssueType
+from src.python.review.quality.model import QualityType, Rule
 
 
 @dataclass
diff --git a/src/python/review/quality/rules/class_response_scoring.py b/src/python/review/quality/rules/class_response_scoring.py
index 9b7633e8..4bfd4800 100644
--- a/src/python/review/quality/rules/class_response_scoring.py
+++ b/src/python/review/quality/rules/class_response_scoring.py
@@ -1,10 +1,9 @@
-from typing import Optional
-
 from dataclasses import dataclass
+from typing import Optional
 
-from src.python.review.quality.model import QualityType, Rule
-from src.python.review.inspectors.issue import IssueType
 from src.python.review.common.language import Language
+from src.python.review.inspectors.issue import IssueType
+from src.python.review.quality.model import QualityType, Rule
 
 
 @dataclass
diff --git a/src/python/review/quality/rules/code_style_scoring.py b/src/python/review/quality/rules/code_style_scoring.py
index 1f1be04e..eaa2c17d 100644
--- a/src/python/review/quality/rules/code_style_scoring.py
+++ b/src/python/review/quality/rules/code_style_scoring.py
@@ -1,8 +1,8 @@
 from dataclasses import dataclass
 
+from src.python.review.common.language import Language
 from src.python.review.inspectors.issue import IssueType
 from src.python.review.quality.model import QualityType, Rule
-from src.python.review.common.language import Language
 
 
 @dataclass
@@ -46,7 +46,6 @@ class CodeStyleRuleConfig:
     language=Language.JAVA
 )
 
-
 LANGUAGE_TO_CODE_STYLE_RULE_CONFIG = {
     Language.JAVA: java_code_style_rule_config,
     Language.KOTLIN: kotlin_code_style_rule_config,
diff --git a/src/python/review/quality/rules/coupling_scoring.py b/src/python/review/quality/rules/coupling_scoring.py
index a7e4e27b..83ea987b 100644
--- a/src/python/review/quality/rules/coupling_scoring.py
+++ b/src/python/review/quality/rules/coupling_scoring.py
@@ -1,10 +1,9 @@
-from typing import Optional
-
 from dataclasses import dataclass
+from typing import Optional
 
-from src.python.review.quality.model import QualityType, Rule
-from src.python.review.inspectors.issue import IssueType
 from src.python.review.common.language import Language
+from src.python.review.inspectors.issue import IssueType
+from src.python.review.quality.model import QualityType, Rule
 
 
 @dataclass
diff --git a/src/python/review/quality/rules/cyclomatic_complexity_scoring.py b/src/python/review/quality/rules/cyclomatic_complexity_scoring.py
index 6b0ec1da..79fb69dc 100644
--- a/src/python/review/quality/rules/cyclomatic_complexity_scoring.py
+++ b/src/python/review/quality/rules/cyclomatic_complexity_scoring.py
@@ -1,10 +1,9 @@
-from typing import Optional
-
 from dataclasses import dataclass
+from typing import Optional
 
-from src.python.review.quality.model import QualityType, Rule
-from src.python.review.inspectors.issue import IssueType
 from src.python.review.common.language import Language
+from src.python.review.inspectors.issue import IssueType
+from src.python.review.quality.model import QualityType, Rule
 
 
 @dataclass
diff --git a/src/python/review/quality/rules/error_prone_scoring.py b/src/python/review/quality/rules/error_prone_scoring.py
index bf585cc3..7a6dee0e 100644
--- a/src/python/review/quality/rules/error_prone_scoring.py
+++ b/src/python/review/quality/rules/error_prone_scoring.py
@@ -1,10 +1,9 @@
-from typing import Optional
-
 from dataclasses import dataclass
+from typing import Optional
 
-from src.python.review.quality.model import QualityType, Rule
-from src.python.review.inspectors.issue import IssueType
 from src.python.review.common.language import Language
+from src.python.review.inspectors.issue import IssueType
+from src.python.review.quality.model import QualityType, Rule
 
 
 @dataclass
diff --git a/src/python/review/quality/rules/function_length_scoring.py b/src/python/review/quality/rules/function_length_scoring.py
index d4f5b02f..f607f679 100644
--- a/src/python/review/quality/rules/function_length_scoring.py
+++ b/src/python/review/quality/rules/function_length_scoring.py
@@ -1,10 +1,9 @@
-from typing import Optional
-
 from dataclasses import dataclass
+from typing import Optional
 
-from src.python.review.quality.model import QualityType, Rule
-from src.python.review.inspectors.issue import IssueType
 from src.python.review.common.language import Language
+from src.python.review.inspectors.issue import IssueType
+from src.python.review.quality.model import QualityType, Rule
 
 
 @dataclass
diff --git a/src/python/review/quality/rules/inheritance_depth_scoring.py b/src/python/review/quality/rules/inheritance_depth_scoring.py
index 645d6c2a..cdabda6b 100644
--- a/src/python/review/quality/rules/inheritance_depth_scoring.py
+++ b/src/python/review/quality/rules/inheritance_depth_scoring.py
@@ -1,10 +1,9 @@
-from typing import Optional
-
 from dataclasses import dataclass
+from typing import Optional
 
-from src.python.review.quality.model import QualityType, Rule
-from src.python.review.inspectors.issue import IssueType
 from src.python.review.common.language import Language
+from src.python.review.inspectors.issue import IssueType
+from src.python.review.quality.model import QualityType, Rule
 
 
 @dataclass
diff --git a/src/python/review/quality/rules/line_len_scoring.py b/src/python/review/quality/rules/line_len_scoring.py
index ecb8ba10..664f3dfd 100644
--- a/src/python/review/quality/rules/line_len_scoring.py
+++ b/src/python/review/quality/rules/line_len_scoring.py
@@ -1,8 +1,8 @@
 from dataclasses import dataclass
 
-from src.python.review.quality.model import QualityType, Rule
-from src.python.review.inspectors.issue import IssueType
 from src.python.review.common.language import Language
+from src.python.review.inspectors.issue import IssueType
+from src.python.review.quality.model import QualityType, Rule
 
 
 @dataclass
diff --git a/src/python/review/quality/rules/method_number_scoring.py b/src/python/review/quality/rules/method_number_scoring.py
index 6976d103..112390c3 100644
--- a/src/python/review/quality/rules/method_number_scoring.py
+++ b/src/python/review/quality/rules/method_number_scoring.py
@@ -1,10 +1,9 @@
-from typing import Optional
-
 from dataclasses import dataclass
+from typing import Optional
 
-from src.python.review.quality.model import QualityType, Rule
-from src.python.review.inspectors.issue import IssueType
 from src.python.review.common.language import Language
+from src.python.review.inspectors.issue import IssueType
+from src.python.review.quality.model import QualityType, Rule
 
 
 @dataclass
diff --git a/src/python/review/quality/rules/weighted_methods_scoring.py b/src/python/review/quality/rules/weighted_methods_scoring.py
index 329ecfc6..777d7b2d 100644
--- a/src/python/review/quality/rules/weighted_methods_scoring.py
+++ b/src/python/review/quality/rules/weighted_methods_scoring.py
@@ -1,10 +1,9 @@
-from typing import Optional
-
 from dataclasses import dataclass
+from typing import Optional
 
-from src.python.review.quality.model import QualityType, Rule
-from src.python.review.inspectors.issue import IssueType
 from src.python.review.common.language import Language
+from src.python.review.inspectors.issue import IssueType
+from src.python.review.quality.model import QualityType, Rule
 
 
 @dataclass
diff --git a/src/python/review/reviewers/common.py b/src/python/review/reviewers/common.py
index 3df326c9..3d7d8a06 100644
--- a/src/python/review/reviewers/common.py
+++ b/src/python/review/reviewers/common.py
@@ -88,7 +88,6 @@ def perform_language_review(metadata: Metadata,
 def filter_out_of_range_issues(issues: List[BaseIssue],
                                start_line: int = 1,
                                end_line: Optional[int] = None) -> List[BaseIssue]:
-
     if end_line is None:
         end_line = 100_000_000
 
diff --git a/src/python/review/reviewers/utils/issues_filter.py b/src/python/review/reviewers/utils/issues_filter.py
index a0caa23d..cb223cf3 100644
--- a/src/python/review/reviewers/utils/issues_filter.py
+++ b/src/python/review/reviewers/utils/issues_filter.py
@@ -3,12 +3,12 @@
 from src.python.review.common.language import Language
 from src.python.review.inspectors.issue import BaseIssue, IssueType
 from src.python.review.quality.rules.boolean_length_scoring import LANGUAGE_TO_BOOLEAN_EXPRESSION_RULE_CONFIG
+from src.python.review.quality.rules.class_response_scoring import LANGUAGE_TO_RESPONSE_RULE_CONFIG
 from src.python.review.quality.rules.coupling_scoring import LANGUAGE_TO_COUPLING_RULE_CONFIG
 from src.python.review.quality.rules.cyclomatic_complexity_scoring import LANGUAGE_TO_CYCLOMATIC_COMPLEXITY_RULE_CONFIG
 from src.python.review.quality.rules.function_length_scoring import LANGUAGE_TO_FUNCTION_LENGTH_RULE_CONFIG
 from src.python.review.quality.rules.inheritance_depth_scoring import LANGUAGE_TO_INHERITANCE_DEPTH_RULE_CONFIG
 from src.python.review.quality.rules.method_number_scoring import LANGUAGE_TO_METHOD_NUMBER_RULE_CONFIG
-from src.python.review.quality.rules.class_response_scoring import LANGUAGE_TO_RESPONSE_RULE_CONFIG
 from src.python.review.quality.rules.weighted_methods_scoring import LANGUAGE_TO_WEIGHTED_METHODS_RULE_CONFIG
 
 
@@ -27,41 +27,40 @@ def filter_low_metric_issues(issues: List[BaseIssue],
 
     # TODO make an abstraction for extraction the value
     for issue in issues:
-        if (issue.type == IssueType.CYCLOMATIC_COMPLEXITY and
-                issue.cc_value <= cyclomatic_complexity_rule_config.cc_value_moderate):
+        if (issue.type == IssueType.CYCLOMATIC_COMPLEXITY
+                and issue.cc_value <= cyclomatic_complexity_rule_config.cc_value_moderate):
             continue
 
-        if (issue.type == IssueType.FUNC_LEN and
-                issue.func_len <= func_len_rule_config.func_len_bad):
+        if (issue.type == IssueType.FUNC_LEN
+                and issue.func_len <= func_len_rule_config.func_len_bad):
             continue
 
-        if (issue.type == IssueType.BOOL_EXPR_LEN and
-                issue.bool_expr_len <= boolean_expression_rule_config.bool_expr_len_good):
+        if (issue.type == IssueType.BOOL_EXPR_LEN
+                and issue.bool_expr_len <= boolean_expression_rule_config.bool_expr_len_good):
             continue
 
-        if (issue.type == IssueType.INHERITANCE_DEPTH and
-                issue.inheritance_tree_depth <= inheritance_depth_rule_config.depth_bad):
+        if (issue.type == IssueType.INHERITANCE_DEPTH
+                and issue.inheritance_tree_depth <= inheritance_depth_rule_config.depth_bad):
             continue
 
-        if (issue.type == IssueType.METHOD_NUMBER and
-                issue.method_number <= method_number_rule_config.method_number_good):
+        if (issue.type == IssueType.METHOD_NUMBER
+                and issue.method_number <= method_number_rule_config.method_number_good):
             continue
 
-        if (issue.type == IssueType.CLASS_RESPONSE and
-                issue.class_response <= response_rule_config.response_good):
+        if (issue.type == IssueType.CLASS_RESPONSE
+                and issue.class_response <= response_rule_config.response_good):
             continue
 
-        if (issue.type == IssueType.WEIGHTED_METHOD and
-                issue.weighted_method <= weighted_methods_rule_config.weighted_methods_good):
+        if (issue.type == IssueType.WEIGHTED_METHOD
+                and issue.weighted_method <= weighted_methods_rule_config.weighted_methods_good):
             continue
 
-        if (issue.type == IssueType.COUPLING and
-                issue.class_objects_coupling <= coupling_rule_config.coupling_moderate):
+        if (issue.type == IssueType.COUPLING
+                and issue.class_objects_coupling <= coupling_rule_config.coupling_moderate):
             continue
 
         # Disable this types of issue, requires further investigation.
-        if (issue.type == IssueType.COHESION or
-                issue.type == IssueType.CHILDREN_NUMBER):
+        if (issue.type == IssueType.COHESION or issue.type == IssueType.CHILDREN_NUMBER):
             continue
 
         filtered_issues.append(issue)
diff --git a/src/python/review/run_tool.py b/src/python/review/run_tool.py
index 5ac2876c..70d10805 100644
--- a/src/python/review/run_tool.py
+++ b/src/python/review/run_tool.py
@@ -9,10 +9,12 @@
 
 sys.path.append('')
 sys.path.append('../../..')
+
 from src.python.review.application_config import ApplicationConfig, LanguageVersion
 from src.python.review.inspectors.inspector_type import InspectorType
 from src.python.review.logging_config import logging_config
-from src.python.review.reviewers.perform_review import OutputFormat, PathNotExists,perform_and_print_review, UnsupportedLanguage
+from src.python.review.reviewers.perform_review import OutputFormat, PathNotExists, perform_and_print_review, \
+    UnsupportedLanguage
 
 logger = logging.getLogger(__name__)
 
diff --git a/test/__init__.py b/test/__init__.py
index 8b137891..e69de29b 100644
--- a/test/__init__.py
+++ b/test/__init__.py
@@ -1 +0,0 @@
-
diff --git a/test/python/__init__.py b/test/python/__init__.py
index 045bea02..3527a200 100644
--- a/test/python/__init__.py
+++ b/test/python/__init__.py
@@ -1,3 +1,3 @@
 from pathlib import Path
 
-TEST_DATA_FOLDER = Path(__file__).parent.parent / 'resources'
\ No newline at end of file
+TEST_DATA_FOLDER = Path(__file__).parent.parent / 'resources'
diff --git a/test/python/functional_tests/test_duplicates.py b/test/python/functional_tests/test_duplicates.py
index 9db420ad..13ff2a83 100644
--- a/test/python/functional_tests/test_duplicates.py
+++ b/test/python/functional_tests/test_duplicates.py
@@ -30,7 +30,7 @@ def test_allow_duplicates(local_command: LocalCommandBuilder):
     pylint_var_issue_re = re.compile(r'.*PYLINT.*Unused variable \'var\'.*', re.DOTALL)
 
     assert len(stdout_filter_duplicates) < len(stdout_allow_duplicates)
-    assert ((flake8_var_issue_re.match(stdout_allow_duplicates) is not None) and
-            (pylint_var_issue_re.match(stdout_allow_duplicates) is not None))
-    assert ((flake8_var_issue_re.match(stdout_filter_duplicates) is not None) ^
-            (pylint_var_issue_re.match(stdout_filter_duplicates) is not None))
+    assert ((flake8_var_issue_re.match(stdout_allow_duplicates) is not None) and (
+            pylint_var_issue_re.match(stdout_allow_duplicates) is not None))
+    assert ((flake8_var_issue_re.match(stdout_filter_duplicates) is not None) ^ (
+            pylint_var_issue_re.match(stdout_filter_duplicates) is not None))
diff --git a/test/python/functional_tests/test_range_of_lines.py b/test/python/functional_tests/test_range_of_lines.py
index 33204714..bcadae0b 100644
--- a/test/python/functional_tests/test_range_of_lines.py
+++ b/test/python/functional_tests/test_range_of_lines.py
@@ -2,8 +2,8 @@
 
 import pytest
 
-from test.python.functional_tests.conftest import DATA_PATH, LocalCommandBuilder
 from src.python.review.common.subprocess_runner import run_in_subprocess
+from test.python.functional_tests.conftest import DATA_PATH, LocalCommandBuilder
 
 PATH_TO_FILE = DATA_PATH / 'lines_range' / 'code_with_multiple_issues.py'
 
@@ -45,7 +45,6 @@
 
 def test_range_filter_when_no_range_specified(
         local_command: LocalCommandBuilder) -> None:
-
     local_command.path = PATH_TO_FILE
     local_command.format = 'json'
 
@@ -57,7 +56,6 @@ def test_range_filter_when_no_range_specified(
 
 def test_range_filter_when_start_line_is_first(
         local_command: LocalCommandBuilder) -> None:
-
     local_command.path = PATH_TO_FILE
     local_command.format = 'json'
     local_command.start_line = 1
@@ -70,7 +68,6 @@ def test_range_filter_when_start_line_is_first(
 
 def test_range_filter_when_start_line_is_not_first(
         local_command: LocalCommandBuilder) -> None:
-
     local_command.path = PATH_TO_FILE
     local_command.format = 'json'
     local_command.start_line = 3
@@ -80,8 +77,8 @@ def test_range_filter_when_start_line_is_not_first(
 
     expected_json_with_one_issue = {
         'quality': {
-                'code': 'MODERATE',
-                'text': 'Code quality (beta): MODERATE'},
+            'code': 'MODERATE',
+            'text': 'Code quality (beta): MODERATE'},
         'issues': [{
             'code': 'C0326',
             'text': 'Exactly one space required around assignment',
@@ -97,7 +94,6 @@ def test_range_filter_when_start_line_is_not_first(
 
 def test_range_filter_when_start_out_of_range(
         local_command: LocalCommandBuilder) -> None:
-
     local_command.path = PATH_TO_FILE
     local_command.format = 'json'
     local_command.start_line = 5
@@ -112,7 +108,6 @@ def test_range_filter_when_start_out_of_range(
 
 def test_range_filter_when_start_line_is_not_positive(
         local_command: LocalCommandBuilder) -> None:
-
     local_command.start_line = 0
 
     with pytest.raises(Exception):
@@ -128,7 +123,6 @@ def test_range_filter_when_start_line_is_not_positive(
 
 def test_range_filter_when_end_line_is_last(
         local_command: LocalCommandBuilder) -> None:
-
     local_command.path = PATH_TO_FILE
     local_command.format = 'json'
     local_command.end_line = 4  # last line with an error
@@ -141,7 +135,6 @@ def test_range_filter_when_end_line_is_last(
 
 def test_range_filter_when_end_line_is_first(
         local_command: LocalCommandBuilder) -> None:
-
     local_command.path = PATH_TO_FILE
     local_command.format = 'json'
     local_command.end_line = 1
@@ -169,7 +162,6 @@ def test_range_filter_when_end_line_is_first(
 
 def test_range_filter_when_end_line_out_of_range(
         local_command: LocalCommandBuilder) -> None:
-
     local_command.path = PATH_TO_FILE
     local_command.format = 'json'
     local_command.end_line = 10
@@ -182,7 +174,6 @@ def test_range_filter_when_end_line_out_of_range(
 
 def test_range_filter_when_both_start_and_end_lines_specified(
         local_command: LocalCommandBuilder) -> None:
-
     local_command.path = PATH_TO_FILE
     local_command.format = 'json'
     local_command.start_line = 1
@@ -196,7 +187,6 @@ def test_range_filter_when_both_start_and_end_lines_specified(
 
 def test_range_filter_when_equal_start_and_end_lines(
         local_command: LocalCommandBuilder) -> None:
-
     local_command.path = PATH_TO_FILE
     local_command.format = 'json'
     local_command.start_line = 3
@@ -210,7 +200,6 @@ def test_range_filter_when_equal_start_and_end_lines(
 
 def test_range_filter_when_both_start_and_end_lines_specified_not_equal_borders(
         local_command: LocalCommandBuilder) -> None:
-
     local_command.path = PATH_TO_FILE
     local_command.format = 'json'
     local_command.start_line = 2
@@ -246,7 +235,6 @@ def test_range_filter_when_both_start_and_end_lines_specified_not_equal_borders(
 
 def test_range_filter_when_both_start_and_end_lines_out_of_range(
         local_command: LocalCommandBuilder) -> None:
-
     local_command.path = PATH_TO_FILE
     local_command.format = 'json'
     local_command.start_line = 10
diff --git a/test/python/inspectors/conftest.py b/test/python/inspectors/conftest.py
index 6945b2fa..615f95dc 100644
--- a/test/python/inspectors/conftest.py
+++ b/test/python/inspectors/conftest.py
@@ -13,7 +13,7 @@
 
 @pytest.fixture
 def branch_info_response() -> Dict[str, Any]:
-    response = {
+    return {
         'result': {
             'commitsCount': 1,
             'filesCount': 1,
@@ -43,12 +43,10 @@ def branch_info_response() -> Dict[str, Any]:
         }
     }
 
-    return response
-
 
 @pytest.fixture
 def ownership_summary_response() -> Dict[str, Any]:
-    response = {
+    return {
         'result': {
             'files': [
                 {
@@ -65,8 +63,6 @@ def ownership_summary_response() -> Dict[str, Any]:
         }
     }
 
-    return response
-
 
 @dataclass(frozen=True)
 class IssuesTestInfo:
diff --git a/test/python/inspectors/test_checkstyle_inspector.py b/test/python/inspectors/test_checkstyle_inspector.py
index be94ec73..6d3043df 100644
--- a/test/python/inspectors/test_checkstyle_inspector.py
+++ b/test/python/inspectors/test_checkstyle_inspector.py
@@ -3,8 +3,8 @@
 from src.python.review.common.language import Language
 from src.python.review.inspectors.checkstyle.checkstyle import CheckstyleInspector
 from src.python.review.reviewers.utils.issues_filter import filter_low_metric_issues
-from test.python.inspectors.conftest import gather_issues_test_info, IssuesTestInfo, use_file_metadata
 from test.python.inspectors import JAVA_DATA_FOLDER
+from test.python.inspectors.conftest import gather_issues_test_info, IssuesTestInfo, use_file_metadata
 
 FILE_NAMES_AND_N_ISSUES = [
     ('test_simple_valid_program.java', 0),
diff --git a/test/python/inspectors/test_flake8_inspector.py b/test/python/inspectors/test_flake8_inspector.py
index 8f864635..97d4bf31 100644
--- a/test/python/inspectors/test_flake8_inspector.py
+++ b/test/python/inspectors/test_flake8_inspector.py
@@ -4,8 +4,8 @@
 from src.python.review.inspectors.flake8.flake8 import Flake8Inspector
 from src.python.review.inspectors.issue import IssueType
 from src.python.review.reviewers.utils.issues_filter import filter_low_metric_issues
-from test.python.inspectors.conftest import gather_issues_test_info, IssuesTestInfo, use_file_metadata
 from test.python.inspectors import PYTHON_DATA_FOLDER
+from test.python.inspectors.conftest import gather_issues_test_info, IssuesTestInfo, use_file_metadata
 
 FILE_NAMES_AND_N_ISSUES = [
     ('case0_spaces.py', 5),