1 files changed, 1 insertions, 0 deletions
diff --git a/run_mypy.py b/run_mypy.py
index 35a90e8e9..f72e96b3d 100755
--- a/run_mypy.py
+++ b/run_mypy.py
@@ -84,6 +84,7 @@ additional = [
     'tools',
     'docs/genrefman.py',
     'docs/refman',
+    'unittests/helpers.py',
 ]
 
 if os.name == 'posix':