--- a/setup.cfg
+++ b/setup.cfg
@@ -9,7 +9,7 @@
 test = pytest
 
 [tool:pytest]
-addopts = --flake8 --isort --cov --ignore=test/cairosvg_reference
+addopts = --cov --ignore=test/cairosvg_reference
 norecursedirs = dist .cache .git build *.egg-info .eggs venv cairosvg_reference
 flake8-ignore = docs/conf.py ALL
 isort_ignore = 
--- a/setup.py
+++ b/setup.py
@@ -99,9 +99,9 @@
         ],
         setup_requires=pytest_runner,
         tests_require=[
-            'pytest-cov', 'pytest-flake8', 'pytest-isort', 'pytest-runner'],
+            'pytest-cov', 'pytest-runner'],
         extras_require={'test': (
-            'pytest-runner', 'pytest-cov', 'pytest-flake8', 'pytest-isort')},
+            'pytest-runner', 'pytest-cov')},
         packages=['tinycss', 'tinycss.tests'],
         **kwargs
     )
--- a/tinycss.egg-info/requires.txt
+++ b/tinycss.egg-info/requires.txt
@@ -2,5 +2,3 @@
 [test]
 pytest-runner
 pytest-cov
-pytest-flake8
-pytest-isort