diff --git a/.flake8 b/.flake8
index 0be5005..220df43 100644
--- a/.flake8
+++ b/.flake8
@@ -9,10 +9,8 @@ ignore =
     # PEP8 weakly recommends Knuth-style line breaks before binary
     # operators
     W503, W504
-exclude =
+extend-exclude =
     # These are directories that it's a waste of time to traverse
-    .git,
-    .tox,
     .venv,
     docs,
     venv,
@@ -20,4 +18,4 @@ exclude =
     # Generated migration files will throw errors. We need to find a way
     # to exclude django-generated migrations while including
     # manually-written migrations.
-    */migrations/*.py,
+    **/migrations/*.py,
diff --git a/setup.cfg b/setup.cfg
deleted file mode 100644
index 01d0caa..0000000
--- a/setup.cfg
+++ /dev/null
@@ -1,2 +0,0 @@
-[flake8]
-exclude = wagtailinventory/migrations/*
diff --git a/tox.ini b/tox.ini
index 2832a8b..8f66d23 100644
--- a/tox.ini
+++ b/tox.ini
@@ -36,15 +36,6 @@ commands=
     flake8 wagtailinventory setup.py
     isort --check-only --diff wagtailinventory
 
-[flake8]
-ignore=E731,W503,W504
-exclude=
-    .git,
-    .tox,
-    __pycache__,
-    */migrations/*.py,
-    */tests/testapp/migrations/*.py,
-
 [isort]
 combine_as_imports=1
 lines_after_imports=2