Run flake8 directly.

conftest.py

@@ -42,16 +42,6 @@ def chdir(tmpdir):
     tmpdir.chdir()
 
 
-def pytest_collection_modifyitems(session, config, items):
-    # Avoid executing tests when executing `--flake8` flag (pytest-flake8)
-    try:
-        from pytest_flake8 import Flake8Item
-        if config.getoption('--flake8'):
-            items[:] = [item for item in items if isinstance(item, Flake8Item)]
-    except ImportError:
-        pass
-
-
 def pytest_addoption(parser):
     parser.addoption(
         "--reactor",

tox.ini

@@ -58,11 +58,10 @@ deps =
     {[testenv]deps}
     # Twisted[http2] is required to import some files
     Twisted[http2]>=17.9.0
-    pytest-flake8==1.1.1
     # newer ones don't work: https://github.com/tholo/pytest-flake8/issues/87
     flake8==4.0.1
 commands =
-    pytest --flake8 {posargs:docs scrapy tests}
+    flake8 {posargs:docs scrapy tests}
 
 [testenv:pylint]
 # reppy does not support Python 3.9+