diff --git a/Makefile b/Makefile
index 4082e006..5dc04cd8 100644
--- a/Makefile
+++ b/Makefile
@@ -86,7 +86,7 @@ configcheck:
 	(cd "$(SPHINX_DIR)"; $(MAKE) configcheck)
 
 flakecheck:
-	$(FLAKE8) --ignore=X999 "$(PROJ)" "$(TESTDIR)"
+	$(FLAKE8) "$(PROJ)" "$(TESTDIR)"
 
 flakediag:
 	-$(MAKE) flakecheck
diff --git a/requirements/pkgutils.txt b/requirements/pkgutils.txt
index ef39a5df..85b4d080 100644
--- a/requirements/pkgutils.txt
+++ b/requirements/pkgutils.txt
@@ -5,3 +5,4 @@ flakeplus>=1.1
 tox>=2.3.1
 sphinx2rst>=1.0
 bumpversion
+pep257
diff --git a/tox.ini b/tox.ini
index f57a4ee2..25541697 100644
--- a/tox.ini
+++ b/tox.ini
@@ -49,7 +49,7 @@ commands = pip install -U -r{toxinidir}/requirements/dev.txt
 
 [testenv:flake8]
 commands =
-    flake8 --ignore=X999 {toxinidir}/kombu {toxinidir}/t
+    flake8 {toxinidir}/kombu {toxinidir}/t
 
 [testenv:flakeplus]
 commands =