diff --git a/tests/commands/run_test.py b/tests/commands/run_test.py
index 22034ea2..4b496fbc 100644
--- a/tests/commands/run_test.py
+++ b/tests/commands/run_test.py
@@ -571,7 +571,7 @@ def test_merge_conflict_modified(cap_out, store, in_merge_conflict):
 
 
 def test_merge_conflict_modified_post_checkout(
-    cap_out, store, in_merge_conflict
+    cap_out, store, in_merge_conflict,
 ):
     # Touch another file so we have unstaged non-conflicting things
     assert os.path.exists('placeholder')