diff --git a/testing/python/collect.py b/testing/python/collect.py
index 0dd9ef1da..eb0a399bd 100644
--- a/testing/python/collect.py
+++ b/testing/python/collect.py
@@ -1091,4 +1091,4 @@ def test_class_injection_does_not_break_collection(testdir):
                 pass
     ''')
     result = testdir.runpytest()
-    assert "RuntimeError: dictionary changed size during iteration" not in result.stdout.str()
\ No newline at end of file
+    assert "RuntimeError: dictionary changed size during iteration" not in result.stdout.str()