1 files changed, 14 insertions, 0 deletions
diff --git a/Lib/idlelib/idle_test/test_util.py b/Lib/idlelib/idle_test/test_util.py
new file mode 100644
index 0000000..20721fe
--- /dev/null
+++ b/Lib/idlelib/idle_test/test_util.py
@@ -0,0 +1,14 @@
+"""Test util, coverage 100%"""
+
+import unittest
+from idlelib import util
+
+
+class UtilTest(unittest.TestCase):
+    def test_extensions(self):
+        for extension in {'.pyi', '.py', '.pyw'}:
+            self.assertIn(extension, util.py_extensions)
+
+
+if __name__ == '__main__':
+    unittest.main(verbosity=2)