diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 4cc2a22b..c08b6e9f 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -27,7 +27,7 @@ jobs:
         # stop the build if there are Python syntax errors or undefined names
         flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics --exclude=.git,__pycache__,docs/source/conf.py,old,build,dist,venv,test/resources,.eggs,review.egg-info,.pytest_cache,node_modules
         # TODO: change max-complexity into 10 after refactoring
-        flake8 . --count --max-complexity=11 --max-line-length=120 --max-doc-length=120 --ignore=I201,I202,I101,I100,R504,A003,E800,SC200,SC100,E402,W503,WPS,H601 --statistics --exclude=.git,__pycache__,docs/source/conf.py,old,build,dist,venv,test/resources,.eggs,review.egg-info,.pytest_cache,node_modules
+        flake8 . --count --max-complexity=11 --max-line-length=120 --max-doc-length=120 --ignore=R504,A003,E800,E402,W503,WPS,H601 --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/requirements-test.txt b/requirements-test.txt
index d0ec886e..4a15ceb8 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -1,8 +1,8 @@
-pytest~=5.4.3
+pytest~=6.2.3
 pytest-runner
 pytest-subtests
 jsonschema==3.2.0
-Django~=3.0.8
-pylint~=2.5.3
-requests~=2.24.0
-setuptools~=47.3.1
\ No newline at end of file
+Django~=3.2
+pylint~=2.7.4
+requests~=2.25.1
+setuptools~=56.0.0
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
index 60409ee1..d5a07c54 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,20 +1,20 @@
-setuptools==47.3.1
+setuptools==56.0.0
 
 # python code analysis tools
-pylint==2.5.3
-pylint-django==2.0.15
-flake8==3.8.3
+pylint==2.7.4
+pylint-django==2.3.0
+flake8==3.9.0
 
 # flake8 plugins
-flake8-bugbear==20.1.4
+flake8-bugbear==21.4.3
 flake8-builtins==1.5.3
-flake8-comprehensions==3.2.3
-flake8-eradicate==0.4.0
+flake8-comprehensions==3.4.0
+flake8-eradicate==1.0.0
 flake8-import-order==0.18.1
-flake8-plugin-utils==1.3.0
+flake8-plugin-utils==1.3.1
 flake8-polyfill==1.0.2
-flake8-return==1.1.1
-flake8-spellcheck==0.14.0
+flake8-return==1.1.2
+flake8-spellcheck==0.24.0
 mccabe==0.6.1
 pep8-naming==0.11.1
 wps-light==0.15.2
@@ -25,5 +25,5 @@ cohesion==1.0.0
 radon==4.5.0
 
 # extra libraries and frameworks
-django==3.0.8
-requests==2.24.0
\ No newline at end of file
+django==3.2
+requests==2.25.1
diff --git a/src/python/review/application_config.py b/src/python/review/application_config.py
index c678605f..41a1c296 100644
--- a/src/python/review/application_config.py
+++ b/src/python/review/application_config.py
@@ -1,6 +1,6 @@
 from dataclasses import dataclass
 from enum import Enum, unique
-from typing import Optional, Set, List
+from typing import List, Optional, Set
 
 from src.python.review.inspectors.inspector_type import InspectorType
 
diff --git a/src/python/review/common/file_system.py b/src/python/review/common/file_system.py
index 3faa962c..764a2d5e 100644
--- a/src/python/review/common/file_system.py
+++ b/src/python/review/common/file_system.py
@@ -4,7 +4,7 @@
 from contextlib import contextmanager
 from enum import Enum, unique
 from pathlib import Path
-from typing import List, Union, Callable
+from typing import Callable, List, Union
 
 
 @unique
diff --git a/src/python/review/inspectors/flake8/.flake8 b/src/python/review/inspectors/flake8/.flake8
index cc3e69cb..2ad4f70f 100644
--- a/src/python/review/inspectors/flake8/.flake8
+++ b/src/python/review/inspectors/flake8/.flake8
@@ -1,5 +1,8 @@
 [flake8]
 disable_noqa=True
+
+dictionaries=en_US,python,technical,django
+
 ignore=W291,  # trailing whitespaces
        W292,  # no newline at end of file
        W293,  # blank line contains whitespaces
diff --git a/src/python/review/inspectors/flake8/flake8.py b/src/python/review/inspectors/flake8/flake8.py
index b974015c..5745a75f 100644
--- a/src/python/review/inspectors/flake8/flake8.py
+++ b/src/python/review/inspectors/flake8/flake8.py
@@ -5,18 +5,18 @@
 
 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.common import convert_percentage_of_value_to_lack_of_value
 from src.python.review.inspectors.flake8.issue_types import CODE_PREFIX_TO_ISSUE_TYPE, CODE_TO_ISSUE_TYPE
 from src.python.review.inspectors.inspector_type import InspectorType
 from src.python.review.inspectors.issue import (
     BaseIssue,
     CodeIssue,
+    CohesionIssue,
     CyclomaticComplexityIssue,
-    IssueType,
     IssueData,
-    CohesionIssue,
+    IssueType,
 )
 from src.python.review.inspectors.tips import get_cyclomatic_complexity_tip
-from src.python.review.inspectors.common import convert_percentage_of_value_to_lack_of_value
 
 logger = logging.getLogger(__name__)
 
diff --git a/src/python/review/inspectors/intellij/issue_types/__init__.py b/src/python/review/inspectors/intellij/issue_types/__init__.py
index 3482d8b4..97b8d31e 100644
--- a/src/python/review/inspectors/intellij/issue_types/__init__.py
+++ b/src/python/review/inspectors/intellij/issue_types/__init__.py
@@ -1,18 +1,15 @@
 from typing import Dict
 
-from src.python.review.inspectors.issue import IssueType
-
 from src.python.review.inspectors.intellij.issue_types.java import (
     ISSUE_CLASS_TO_ISSUE_TYPE as JAVA_ISSUE_CLASS_TO_ISSUE_TYPE,
 )
-
 from src.python.review.inspectors.intellij.issue_types.kotlin import (
     ISSUE_CLASS_TO_ISSUE_TYPE as KOTLIN_ISSUE_CLASS_TO_ISSUE_TYPE,
 )
-
 from src.python.review.inspectors.intellij.issue_types.python import (
     ISSUE_CLASS_TO_ISSUE_TYPE as PYTHON_ISSUE_CLASS_TO_ISSUE_TYPE,
 )
+from src.python.review.inspectors.issue import IssueType
 
 ISSUE_CLASS_TO_ISSUE_TYPE: Dict[str, IssueType] = {
     **JAVA_ISSUE_CLASS_TO_ISSUE_TYPE,
diff --git a/src/python/review/inspectors/parsers/checkstyle_parser.py b/src/python/review/inspectors/parsers/checkstyle_parser.py
index cae3593f..1db9874c 100644
--- a/src/python/review/inspectors/parsers/checkstyle_parser.py
+++ b/src/python/review/inspectors/parsers/checkstyle_parser.py
@@ -1,23 +1,21 @@
 import logging
 import re
 from pathlib import Path
-from typing import Callable, Dict, List, Any, Optional
+from typing import Any, Callable, Dict, List, Optional
 from xml.etree import ElementTree
 
 from src.python.review.common.file_system import get_content_from_file
 from src.python.review.inspectors.inspector_type import InspectorType
-
 from src.python.review.inspectors.issue import (
     BaseIssue,
     BoolExprLenIssue,
     CodeIssue,
     CyclomaticComplexityIssue,
     FuncLenIssue,
+    IssueData,
     IssueType,
     LineLenIssue,
-    IssueData,
 )
-
 from src.python.review.inspectors.tips import (
     get_bool_expr_len_tip,
     get_cyclomatic_complexity_tip,
diff --git a/src/python/review/inspectors/radon/radon.py b/src/python/review/inspectors/radon/radon.py
index fb2bf299..f6a2236d 100644
--- a/src/python/review/inspectors/radon/radon.py
+++ b/src/python/review/inspectors/radon/radon.py
@@ -4,9 +4,9 @@
 
 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.common import convert_percentage_of_value_to_lack_of_value
 from src.python.review.inspectors.inspector_type import InspectorType
 from src.python.review.inspectors.issue import BaseIssue, IssueData, IssueType, MaintainabilityLackIssue
-from src.python.review.inspectors.common import convert_percentage_of_value_to_lack_of_value
 from src.python.review.inspectors.tips import get_maintainability_index_tip
 
 
diff --git a/src/python/review/inspectors/springlint/springlint.py b/src/python/review/inspectors/springlint/springlint.py
index cc90c487..b5eca5a4 100644
--- a/src/python/review/inspectors/springlint/springlint.py
+++ b/src/python/review/inspectors/springlint/springlint.py
@@ -3,13 +3,12 @@
 import re
 from pathlib import Path
 from shutil import copy
-from typing import AnyStr, List, Optional, Dict, Any
+from typing import Any, AnyStr, Dict, List, Optional
 
 from src.python.review.common.file_system import new_temp_dir
 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,
@@ -18,12 +17,11 @@
     CohesionIssue,
     CouplingIssue,
     InheritanceIssue,
+    IssueData,
     IssueType,
     MethodNumberIssue,
     WeightedMethodIssue,
-    IssueData,
 )
-
 from src.python.review.inspectors.tips import (
     get_child_number_tip,
     get_class_coupling_tip,
diff --git a/src/python/review/quality/evaluate_quality.py b/src/python/review/quality/evaluate_quality.py
index 3861d3b3..b6329653 100644
--- a/src/python/review/quality/evaluate_quality.py
+++ b/src/python/review/quality/evaluate_quality.py
@@ -13,6 +13,10 @@
 )
 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.cohesion_scoring import (
+    CohesionRule,
+    LANGUAGE_TO_COHESION_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,
@@ -28,6 +32,10 @@
     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.maintainability_scoring import (
+    LANGUAGE_TO_MAINTAINABILITY_RULE_CONFIG,
+    MaintainabilityRule,
+)
 from src.python.review.quality.rules.method_number_scoring import (
     LANGUAGE_TO_METHOD_NUMBER_RULE_CONFIG,
     MethodNumberRule,
@@ -37,14 +45,6 @@
     WeightedMethodsRule,
 )
 from src.python.review.reviewers.utils.code_statistics import CodeStatistics
-from src.python.review.quality.rules.cohesion_scoring import (
-    LANGUAGE_TO_COHESION_RULE_CONFIG,
-    CohesionRule,
-)
-from src.python.review.quality.rules.maintainability_scoring import (
-    LANGUAGE_TO_MAINTAINABILITY_RULE_CONFIG,
-    MaintainabilityRule,
-)
 
 
 def __get_available_rules(language: Language) -> List[Rule]:
diff --git a/src/python/review/quality/model.py b/src/python/review/quality/model.py
index 6e64ea81..7a57dcf6 100644
--- a/src/python/review/quality/model.py
+++ b/src/python/review/quality/model.py
@@ -50,7 +50,7 @@ def quality_type(self) -> QualityType:
     def next_quality_type(self) -> QualityType:
         return min(map(lambda rule: rule.next_level_type, self.rules), default=QualityType.EXCELLENT)
 
-    # TODO@nbirillo: why rule.quality_type == quality_type for next level????
+    # TODO: why rule.quality_type == quality_type for next level????
     @property
     def next_level_requirements(self) -> List[Rule]:
         quality_type = self.quality_type
diff --git a/src/python/review/quality/rules/cohesion_scoring.py b/src/python/review/quality/rules/cohesion_scoring.py
index c73a426b..623fd2db 100644
--- a/src/python/review/quality/rules/cohesion_scoring.py
+++ b/src/python/review/quality/rules/cohesion_scoring.py
@@ -3,7 +3,7 @@
 
 from src.python.review.common.language import Language
 from src.python.review.inspectors.issue import IssueType
-from src.python.review.quality.model import Rule, QualityType
+from src.python.review.quality.model import QualityType, Rule
 
 
 @dataclass
diff --git a/src/python/review/quality/rules/maintainability_scoring.py b/src/python/review/quality/rules/maintainability_scoring.py
index 456e7b0a..ade6fd4b 100644
--- a/src/python/review/quality/rules/maintainability_scoring.py
+++ b/src/python/review/quality/rules/maintainability_scoring.py
@@ -3,7 +3,7 @@
 
 from src.python.review.common.language import Language
 from src.python.review.inspectors.issue import IssueType
-from src.python.review.quality.model import Rule, QualityType
+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 d7385fe5..9340d824 100644
--- a/src/python/review/reviewers/common.py
+++ b/src/python/review/reviewers/common.py
@@ -8,11 +8,11 @@
 from src.python.review.inspectors.detekt.detekt import DetektInspector
 from src.python.review.inspectors.eslint.eslint import ESLintInspector
 from src.python.review.inspectors.flake8.flake8 import Flake8Inspector
-from src.python.review.inspectors.radon.radon import RadonInspector
 from src.python.review.inspectors.issue import BaseIssue
 from src.python.review.inspectors.pmd.pmd import PMDInspector
 from src.python.review.inspectors.pyast.python_ast import PythonAstInspector
 from src.python.review.inspectors.pylint.pylint import PylintInspector
+from src.python.review.inspectors.radon.radon import RadonInspector
 from src.python.review.quality.evaluate_quality import evaluate_quality
 from src.python.review.quality.model import Quality
 from src.python.review.reviewers.review_result import FileReviewResult, ReviewResult
diff --git a/src/python/review/reviewers/python.py b/src/python/review/reviewers/python.py
index a239913a..d51b526a 100644
--- a/src/python/review/reviewers/python.py
+++ b/src/python/review/reviewers/python.py
@@ -2,7 +2,7 @@
 from typing import List
 
 from src.python.review.application_config import ApplicationConfig
-from src.python.review.common.file_system import get_all_file_system_items, FileSystemItem
+from src.python.review.common.file_system import FileSystemItem, get_all_file_system_items
 from src.python.review.common.language import Language
 from src.python.review.reviewers.common import perform_language_review
 from src.python.review.reviewers.review_result import ReviewResult
diff --git a/src/python/review/reviewers/utils/code_statistics.py b/src/python/review/reviewers/utils/code_statistics.py
index d8dd7b38..19218a7b 100644
--- a/src/python/review/reviewers/utils/code_statistics.py
+++ b/src/python/review/reviewers/utils/code_statistics.py
@@ -1,7 +1,7 @@
 from collections import Counter
 from dataclasses import dataclass
 from pathlib import Path
-from typing import List, Dict
+from typing import Dict, List
 
 from src.python.review.common.file_system import get_content_from_file
 from src.python.review.inspectors.issue import BaseIssue, IssueType
diff --git a/src/python/review/reviewers/utils/issues_filter.py b/src/python/review/reviewers/utils/issues_filter.py
index a952998c..b6e5529e 100644
--- a/src/python/review/reviewers/utils/issues_filter.py
+++ b/src/python/review/reviewers/utils/issues_filter.py
@@ -5,14 +5,14 @@
 from src.python.review.inspectors.issue import BaseIssue, IssueType, Measurable
 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.cohesion_scoring import LANGUAGE_TO_COHESION_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.maintainability_scoring import LANGUAGE_TO_MAINTAINABILITY_RULE_CONFIG
 from src.python.review.quality.rules.method_number_scoring import LANGUAGE_TO_METHOD_NUMBER_RULE_CONFIG
 from src.python.review.quality.rules.weighted_methods_scoring import LANGUAGE_TO_WEIGHTED_METHODS_RULE_CONFIG
-from src.python.review.quality.rules.cohesion_scoring import LANGUAGE_TO_COHESION_RULE_CONFIG
-from src.python.review.quality.rules.maintainability_scoring import LANGUAGE_TO_MAINTAINABILITY_RULE_CONFIG
 
 
 def __get_issue_type_to_low_measure_dict(language: Language) -> Dict[IssueType, int]:
diff --git a/src/python/review/run_tool.py b/src/python/review/run_tool.py
index 1b879972..0d96f6e8 100644
--- a/src/python/review/run_tool.py
+++ b/src/python/review/run_tool.py
@@ -5,7 +5,7 @@
 import traceback
 from enum import Enum, unique
 from pathlib import Path
-from typing import Set, List
+from typing import List, Set
 
 sys.path.append('')
 sys.path.append('../../..')
@@ -13,7 +13,6 @@
 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,
diff --git a/test/python/functional_tests/conftest.py b/test/python/functional_tests/conftest.py
index eea5a9ab..da01adde 100644
--- a/test/python/functional_tests/conftest.py
+++ b/test/python/functional_tests/conftest.py
@@ -1,11 +1,10 @@
 from dataclasses import dataclass, field
 from pathlib import Path
+from test.python import TEST_DATA_FOLDER
 from typing import List, Optional
 
 import pytest
-
 from src.python import MAIN_FOLDER
-from test.python import TEST_DATA_FOLDER
 
 DATA_PATH = TEST_DATA_FOLDER / 'functional_tests'
 
diff --git a/test/python/functional_tests/test_different_languages.py b/test/python/functional_tests/test_different_languages.py
index 935df678..c55e56f9 100644
--- a/test/python/functional_tests/test_different_languages.py
+++ b/test/python/functional_tests/test_different_languages.py
@@ -1,5 +1,4 @@
 import subprocess
-
 from test.python.functional_tests.conftest import DATA_PATH, LocalCommandBuilder
 
 
diff --git a/test/python/functional_tests/test_disable.py b/test/python/functional_tests/test_disable.py
index ffacbec1..7967e1bc 100644
--- a/test/python/functional_tests/test_disable.py
+++ b/test/python/functional_tests/test_disable.py
@@ -1,5 +1,4 @@
 import subprocess
-
 from test.python.functional_tests.conftest import DATA_PATH, LocalCommandBuilder
 
 
diff --git a/test/python/functional_tests/test_duplicates.py b/test/python/functional_tests/test_duplicates.py
index 153a3ac7..9158e030 100644
--- a/test/python/functional_tests/test_duplicates.py
+++ b/test/python/functional_tests/test_duplicates.py
@@ -1,6 +1,5 @@
 import re
 import subprocess
-
 from test.python.functional_tests.conftest import DATA_PATH, LocalCommandBuilder
 
 
diff --git a/test/python/functional_tests/test_exit_code.py b/test/python/functional_tests/test_exit_code.py
index bd24d250..4d5dad1a 100644
--- a/test/python/functional_tests/test_exit_code.py
+++ b/test/python/functional_tests/test_exit_code.py
@@ -1,6 +1,5 @@
 import subprocess
 from pathlib import Path
-
 from test.python.functional_tests.conftest import DATA_PATH, LocalCommandBuilder
 
 
diff --git a/test/python/functional_tests/test_file_or_project.py b/test/python/functional_tests/test_file_or_project.py
index bd9d1d74..074c77aa 100644
--- a/test/python/functional_tests/test_file_or_project.py
+++ b/test/python/functional_tests/test_file_or_project.py
@@ -1,5 +1,4 @@
 import subprocess
-
 from test.python.functional_tests.conftest import DATA_PATH, LocalCommandBuilder
 
 
diff --git a/test/python/functional_tests/test_multi_file_project.py b/test/python/functional_tests/test_multi_file_project.py
index 246f4f42..86a029d1 100644
--- a/test/python/functional_tests/test_multi_file_project.py
+++ b/test/python/functional_tests/test_multi_file_project.py
@@ -1,6 +1,5 @@
 import json
 import subprocess
-
 from test.python.functional_tests.conftest import DATA_PATH, LocalCommandBuilder
 
 EXPECTED_JSON = {
diff --git a/test/python/functional_tests/test_range_of_lines.py b/test/python/functional_tests/test_range_of_lines.py
index 57b5530d..1ef4a8f5 100644
--- a/test/python/functional_tests/test_range_of_lines.py
+++ b/test/python/functional_tests/test_range_of_lines.py
@@ -1,9 +1,8 @@
 import json
+from test.python.functional_tests.conftest import DATA_PATH, LocalCommandBuilder
 
 import pytest
-
 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'
 
@@ -14,23 +13,23 @@
     },
     'issues': [{
         'category': 'CODE_STYLE',
-        'code': 'C0326',
+        'code': 'E225',
         'column_number': 2,
         'line': 'a=10',
         'line_number': 1,
-        'text': 'Exactly one space required around assignment'},
+        'text': 'missing whitespace around operator'},
         {'category': 'CODE_STYLE',
-         'code': 'C0326',
+         'code': 'E225',
          'column_number': 2,
          'line': 'b=20',
          'line_number': 2,
-         'text': 'Exactly one space required around assignment'},
+         'text': 'missing whitespace around operator'},
         {'category': 'CODE_STYLE',
-         'code': 'C0326',
+         'code': 'E225',
          'column_number': 2,
          'line': 'c=a + b',
          'line_number': 4,
-         'text': 'Exactly one space required around assignment',
+         'text': 'missing whitespace around operator',
          },
     ],
 }
@@ -80,8 +79,8 @@ def test_range_filter_when_start_line_is_not_first(
             'code': 'MODERATE',
             'text': 'Code quality (beta): MODERATE'},
         'issues': [{
-            'code': 'C0326',
-            'text': 'Exactly one space required around assignment',
+            'code': 'E225',
+            'text': 'missing whitespace around operator',
             'line': 'c=a + b',
             'line_number': 4,
             'column_number': 2,
@@ -148,8 +147,8 @@ def test_range_filter_when_end_line_is_first(
             'text': 'Code quality (beta): MODERATE',
         },
         'issues': [{
-            'code': 'C0326',
-            'text': 'Exactly one space required around assignment',
+            'code': 'E225',
+            'text': 'missing whitespace around operator',
             'line': 'a=10',
             'line_number': 1,
             'column_number': 2,
@@ -214,15 +213,15 @@ def test_range_filter_when_both_start_and_end_lines_specified_not_equal_borders(
             'text': 'Code quality (beta): BAD',
         },
         'issues': [{
-            'code': 'C0326',
-            'text': 'Exactly one space required around assignment',
+            'code': 'E225',
+            'text': 'missing whitespace around operator',
             'line': 'b=20',
             'line_number': 2,
             'column_number': 2,
             'category': 'CODE_STYLE',
         }, {
-            'code': 'C0326',
-            'text': 'Exactly one space required around assignment',
+            'code': 'E225',
+            'text': 'missing whitespace around operator',
             'line': 'c=a + b',
             'line_number': 4,
             'column_number': 2,
diff --git a/test/python/functional_tests/test_single_file_json_format.py b/test/python/functional_tests/test_single_file_json_format.py
index 48d8f14d..85616145 100644
--- a/test/python/functional_tests/test_single_file_json_format.py
+++ b/test/python/functional_tests/test_single_file_json_format.py
@@ -1,10 +1,9 @@
 import json
 import subprocess
+from test.python.functional_tests.conftest import DATA_PATH, LocalCommandBuilder
 
 from jsonschema import validate
 
-from test.python.functional_tests.conftest import DATA_PATH, LocalCommandBuilder
-
 schema = {
     'type': 'object',
     'properties': {
diff --git a/test/python/functional_tests/test_verbosity.py b/test/python/functional_tests/test_verbosity.py
index bed69f90..e835258b 100644
--- a/test/python/functional_tests/test_verbosity.py
+++ b/test/python/functional_tests/test_verbosity.py
@@ -1,6 +1,5 @@
 import json
 import subprocess
-
 from test.python.functional_tests.conftest import DATA_PATH, LocalCommandBuilder
 
 
diff --git a/test/python/inspectors/conftest.py b/test/python/inspectors/conftest.py
index d3df943c..f9072db7 100644
--- a/test/python/inspectors/conftest.py
+++ b/test/python/inspectors/conftest.py
@@ -5,7 +5,6 @@
 from typing import Any, Dict, List
 
 import pytest
-
 from src.python.review.common.file_system import new_temp_dir
 from src.python.review.inspectors.issue import BaseIssue, IssueType
 from src.python.review.reviewers.utils.metadata_exploration import explore_file, FileMetadata
diff --git a/test/python/inspectors/test_checkstyle_inspector.py b/test/python/inspectors/test_checkstyle_inspector.py
index 892ec97f..ce7040aa 100644
--- a/test/python/inspectors/test_checkstyle_inspector.py
+++ b/test/python/inspectors/test_checkstyle_inspector.py
@@ -1,10 +1,10 @@
-import pytest
+from test.python.inspectors import JAVA_DATA_FOLDER
+from test.python.inspectors.conftest import gather_issues_test_info, IssuesTestInfo, use_file_metadata
 
+import pytest
 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_measure_issues
-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_detekt_inspector.py b/test/python/inspectors/test_detekt_inspector.py
index 4dbafd2d..61d05200 100644
--- a/test/python/inspectors/test_detekt_inspector.py
+++ b/test/python/inspectors/test_detekt_inspector.py
@@ -1,10 +1,10 @@
-import pytest
+from test.python.inspectors import KOTLIN_DATA_FOLDER
+from test.python.inspectors.conftest import use_file_metadata
 
+import pytest
 from src.python.review.common.language import Language
 from src.python.review.inspectors.detekt.detekt import DetektInspector
 from src.python.review.reviewers.utils.issues_filter import filter_low_measure_issues
-from test.python.inspectors import KOTLIN_DATA_FOLDER
-from test.python.inspectors.conftest import use_file_metadata
 
 FILE_NAMES_AND_N_ISSUES = [
     ('case0_good_program.kt', 0),
diff --git a/test/python/inspectors/test_eslint_inspector.py b/test/python/inspectors/test_eslint_inspector.py
index 076c76a0..a69f30e5 100644
--- a/test/python/inspectors/test_eslint_inspector.py
+++ b/test/python/inspectors/test_eslint_inspector.py
@@ -1,10 +1,10 @@
-import pytest
+from test.python.inspectors import JS_DATA_FOLDER
+from test.python.inspectors.conftest import use_file_metadata
 
+import pytest
 from src.python.review.common.language import Language
 from src.python.review.inspectors.eslint.eslint import ESLintInspector
 from src.python.review.reviewers.utils.issues_filter import filter_low_measure_issues
-from test.python.inspectors import JS_DATA_FOLDER
-from test.python.inspectors.conftest import use_file_metadata
 
 FILE_NAMES_AND_N_ISSUES = [
     ('case0_no_issues.js', 0),
diff --git a/test/python/inspectors/test_flake8_inspector.py b/test/python/inspectors/test_flake8_inspector.py
index be211040..3208d633 100644
--- a/test/python/inspectors/test_flake8_inspector.py
+++ b/test/python/inspectors/test_flake8_inspector.py
@@ -1,12 +1,12 @@
-import pytest
+from test.python.inspectors import PYTHON_DATA_FOLDER
+from test.python.inspectors.conftest import gather_issues_test_info, IssuesTestInfo, use_file_metadata
 from textwrap import dedent
 
+import pytest
 from src.python.review.common.language import Language
 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_measure_issues
-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),
@@ -25,7 +25,7 @@
     ('case14_returns_errors.py', 4),
     ('case16_comments.py', 0),
     ('case17_dangerous_default_value.py', 1),
-    ('case18_comprehensions.py', 10),
+    ('case18_comprehensions.py', 9),
     ('case19_bad_indentation.py', 3),
     ('case21_imports.py', 2),
     ('case25_django.py', 0),
diff --git a/test/python/inspectors/test_local_review.py b/test/python/inspectors/test_local_review.py
index e1e028e6..5b182540 100644
--- a/test/python/inspectors/test_local_review.py
+++ b/test/python/inspectors/test_local_review.py
@@ -1,13 +1,12 @@
 import json
 from collections import namedtuple
+from test.python.inspectors import PYTHON_DATA_FOLDER
 
 import pytest
-
 from src.python.review.application_config import ApplicationConfig
 from src.python.review.inspectors.inspector_type import InspectorType
 from src.python.review.quality.model import QualityType
 from src.python.review.reviewers.perform_review import OutputFormat, PathNotExists, perform_and_print_review
-from test.python.inspectors import PYTHON_DATA_FOLDER
 
 Args = namedtuple('Args', [
     'path',
@@ -24,7 +23,7 @@ def config() -> ApplicationConfig:
         disabled_inspectors={InspectorType.INTELLIJ},
         allow_duplicates=False,
         n_cpu=1,
-        inspectors_config=dict(n_cpu=1),
+        inspectors_config={"n_cpu": 1},
     )
 
 
diff --git a/test/python/inspectors/test_pmd_inspector.py b/test/python/inspectors/test_pmd_inspector.py
index 18b13af4..393a2d46 100644
--- a/test/python/inspectors/test_pmd_inspector.py
+++ b/test/python/inspectors/test_pmd_inspector.py
@@ -1,7 +1,8 @@
-import pytest
+from test.python.inspectors import JAVA_DATA_FOLDER
 
+import pytest
 from src.python.review.inspectors.pmd.pmd import PMDInspector
-from test.python.inspectors import JAVA_DATA_FOLDER
+
 from .conftest import use_file_metadata
 
 FILE_NAMES_AND_N_ISSUES = [
diff --git a/test/python/inspectors/test_pylint_inspector.py b/test/python/inspectors/test_pylint_inspector.py
index ab807765..ba4be12f 100644
--- a/test/python/inspectors/test_pylint_inspector.py
+++ b/test/python/inspectors/test_pylint_inspector.py
@@ -1,14 +1,14 @@
 import textwrap
+from test.python.inspectors import PYTHON_DATA_FOLDER
 
 import pytest
-
 from src.python.review.inspectors.issue import IssueType
 from src.python.review.inspectors.pylint.pylint import PylintInspector
-from test.python.inspectors import PYTHON_DATA_FOLDER
+
 from .conftest import use_file_metadata
 
 FILE_NAMES_AND_N_ISSUES = [
-    ('case0_spaces.py', 3),
+    ('case0_spaces.py', 0),
     ('case1_simple_valid_program.py', 0),
     ('case2_boolean_expressions.py', 3),
     ('case3_redefining_builtin.py', 2),
@@ -24,7 +24,7 @@
     ('case15_redefining.py', 2),
     ('case16_comments.py', 0),
     ('case17_dangerous_default_value.py', 1),
-    ('case18_comprehensions.py', 2),
+    ('case18_comprehensions.py', 3),
     ('case19_bad_indentation.py', 2),
     ('case21_imports.py', 2),
     ('case23_merging_comparisons.py', 4),
diff --git a/test/python/inspectors/test_python_ast.py b/test/python/inspectors/test_python_ast.py
index fed3c542..880e4775 100644
--- a/test/python/inspectors/test_python_ast.py
+++ b/test/python/inspectors/test_python_ast.py
@@ -1,18 +1,15 @@
 import ast
+from test.python.inspectors import PYTHON_AST_DATA_FOLDER, PYTHON_DATA_FOLDER
+from test.python.inspectors.conftest import use_file_metadata
 
 import pytest
-
 from src.python.review.inspectors.inspector_type import InspectorType
-
 from src.python.review.inspectors.pyast.python_ast import (
     BoolExpressionLensGatherer,
     FunctionLensGatherer,
     PythonAstInspector,
 )
 
-from test.python.inspectors import PYTHON_DATA_FOLDER, PYTHON_AST_DATA_FOLDER
-from test.python.inspectors.conftest import use_file_metadata
-
 FILE_NAMES_AND_N_ISSUES = [
     ('case0_spaces.py', 0),
     ('case1_simple_valid_program.py', 0),
diff --git a/test/python/inspectors/test_radon_inspector.py b/test/python/inspectors/test_radon_inspector.py
index 72fd03e7..4ed41e1e 100644
--- a/test/python/inspectors/test_radon_inspector.py
+++ b/test/python/inspectors/test_radon_inspector.py
@@ -1,14 +1,14 @@
+from test.python.inspectors import PYTHON_DATA_FOLDER
+from test.python.inspectors.conftest import use_file_metadata
 from textwrap import dedent
 
 import pytest
-
 from src.python.review.common.language import Language
 from src.python.review.inspectors.issue import IssueType
 from src.python.review.inspectors.radon.radon import RadonInspector
-from src.python.review.reviewers.utils.issues_filter import filter_low_measure_issues
-from test.python.inspectors import PYTHON_DATA_FOLDER
-from test.python.inspectors.conftest import use_file_metadata
 from src.python.review.inspectors.tips import get_maintainability_index_tip
+from src.python.review.reviewers.utils.issues_filter import filter_low_measure_issues
+
 
 FILE_NAMES_AND_N_ISSUES = [
     ("case13_complex_logic.py", 1),
diff --git a/test/python/inspectors/test_springlint_inspector.py b/test/python/inspectors/test_springlint_inspector.py
index 18ee8dfb..673aa30c 100644
--- a/test/python/inspectors/test_springlint_inspector.py
+++ b/test/python/inspectors/test_springlint_inspector.py
@@ -1,6 +1,7 @@
+from test.python.inspectors import SPRING_DATA_FOLDER
+
 from src.python.review.inspectors.issue import IssueType
 from src.python.review.inspectors.springlint.springlint import SpringlintInspector
-from test.python.inspectors import SPRING_DATA_FOLDER
 
 
 def test_controller_with_smells():
diff --git a/test/resources/inspectors/python/case18_comprehensions.py b/test/resources/inspectors/python/case18_comprehensions.py
index 3ed9be6f..4365018e 100644
--- a/test/resources/inspectors/python/case18_comprehensions.py
+++ b/test/resources/inspectors/python/case18_comprehensions.py
@@ -11,7 +11,7 @@
 
 dict(((1, 2),))  # {1: 2}
 
-sum([x ** 2 for x in range(10)])  # sum(x ** 2 for x in range(10))
+sum([x ** 2 for x in range(10)])  # we allow this since flake8-comprehension 3.4.0 (see its changelog)
 
 test_dict = dict()   # we allow this
 test_list = list()   # we allow this
diff --git a/whitelist.txt b/whitelist.txt
index c2473e99..a36bef18 100644
--- a/whitelist.txt
+++ b/whitelist.txt
@@ -54,6 +54,25 @@ unlink
 utils
 param
 params
+changelog
+multiline
+sqrt
+WPS
+OOP
+mccabe
+mcs
+dicts
+misrefactored
+src
+textwrap
+dedent
+maintainabilities
+parsers
+fs
+KTS
+nl
+splitext
+dirname
 # Springlint issues
 cbo
 dit
@@ -61,5 +80,3 @@ lcom
 noc
 nom
 wmc
-multiline
-sqrt