Update isort to v3.8.3

1 files changed, 1 insertions, 2 deletions

diff --git a/tox.ini b/tox.ini

index c777c0c5c3..ea41f1c1de 100644
--- a/tox.ini
+++ b/tox.ini
@@ -120,8 +120,7 @@ commands =
 [testenv:check_codestyle]
 skip_install = True
 deps =
-    flake8==3.7.9  # We temporarily pin flake8's version before the v1.13.0 merge which has
-                   # fixes for flake8 3.8.1
+    flake8==3.8.3
     flake8-comprehensions
     # We pin so that our tests don't start failing on new releases of black.
     black==19.10b0