diff --git a/mypy.ini b/mypy.ini
index 1dd91ee7..fffd2aa8 100644
--- a/mypy.ini
+++ b/mypy.ini
@@ -6,13 +6,13 @@ disallow_untyped_defs = True
 disallow_any_generics = True
 disallow_untyped_calls = True
 disallow_untyped_decorators = True
-disallow_subclassing_any = True
+disallow_subclassing_any = False
 ignore_missing_imports = True
 strict_optional = False
 warn_unused_ignores = True
 strict_equality = True
 warn_redundant_casts = True
-warn_return_any = True
+warn_return_any = False
 warn_unused_configs = True
 warn_unreachable = True
 
diff --git a/setup.py b/setup.py
index f823a15c..c0b6f353 100644
--- a/setup.py
+++ b/setup.py
@@ -1,9 +1,6 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
-from setuptools import (
-    setup,
-    find_packages,
-)
+from setuptools import find_packages, setup
 
 extras_require = {
     "test": [
@@ -21,7 +18,7 @@ extras_require = {
         "flake8-bugbear>=19.8.0,<20",
         "docformatter>=1.3.1,<2",
     ],
-    'doc': [
+    "doc": [
         "Sphinx>=1.6.5,<2",
         "sphinx_rtd_theme>=0.4.3,<=1",
         "towncrier>=19.2.0, <20",
@@ -38,10 +35,10 @@ extras_require = {
 }
 
 extras_require["dev"] = (
-    extras_require['dev'] +  # noqa: W504
-    extras_require['test'] +  # noqa: W504
-    extras_require['lint'] +  # noqa: W504
-    extras_require['doc']
+    extras_require["dev"]
+    + extras_require["test"]
+    + extras_require["lint"]
+    + extras_require["doc"]
 )
 
 
@@ -74,7 +71,7 @@ setup(
     ],
     python_requires=">=3.7,<4",
     extras_require=extras_require,
-    py_modules=['<MODULE_NAME>'],
+    py_modules=["<MODULE_NAME>"],
     license="MIT/APACHE2.0",
     zip_safe=False,
     keywords="libp2p p2p",
diff --git a/tests/core/test_import.py b/tests/core/test_import.py
index f146ae79..07b2a18e 100644
--- a/tests/core/test_import.py
+++ b/tests/core/test_import.py
@@ -1,4 +1,2 @@
-
-
 def test_import():
     import <MODULE_NAME>  # noqa: F401
diff --git a/tox.ini b/tox.ini
index 52d621cf..ce0fbe01 100644
--- a/tox.ini
+++ b/tox.ini
@@ -9,10 +9,10 @@ envlist =
     docs
 
 [isort]
-combine_as_imports=True
+combine_as_imports=False
 force_sort_within_sections=True
 include_trailing_comma=True
-known_third_party=hypothesis,pytest,p2pclient,pexpect
+known_third_party=hypothesis,pytest,p2pclient,pexpect,factory
 known_first_party=<MODULE_NAME>
 line_length=88
 multi_line_output=3