diff --git a/.git-blame-ignore-revs b/.git-blame-ignore-revs
index 9c653b70..48d5ea2d 100644
--- a/.git-blame-ignore-revs
+++ b/.git-blame-ignore-revs
@@ -6,3 +6,4 @@
 #     git config blame.ignoreRevsFile .git-blame-ignore-revs
 
 a12ad693137d82770e6118ea8d90955e2c753305  # Format twine and tests with black
+f468612c021eae225b07f1b654bdb620d1500bf1  # Sort imports with isort
diff --git a/tox.ini b/tox.ini
index 809883bb..f15084cb 100644
--- a/tox.ini
+++ b/tox.ini
@@ -47,9 +47,11 @@ commands =
 
 [testenv:lint-code-style]
 deps =
+    isort
     black
     flake8
 commands =
+    isort --check-only --diff --recursive twine/ tests/
     black --check --diff twine/ tests/
     flake8 twine/ tests/