diff --git a/tox.ini b/tox.ini
index 22fe9fe5..cbdaf80d 100644
--- a/tox.ini
+++ b/tox.ini
@@ -23,7 +23,7 @@ changedir = {toxinidir}
 [testenv:black]
 commands =
     black --check --target-version=py36 .
-    isort -c -rc .
+    isort -c .
 changedir = {toxinidir}
 
 [testenv:flake8]