Issue #29319: Prevent RunMainFromImporter overwriting sys.path[0].

1 files changed, 7 insertions, 1 deletions

diff --git a/Lib/test/test_wave.py b/Lib/test/test_wave.py
index 3eff773bca..8666f7269c 100644
--- a/Lib/test/test_wave.py
+++ b/Lib/test/test_wave.py
@@ -1,6 +1,6 @@
-from test.support import TESTFN
 import unittest
 from test import audiotests
+from test import support
 from audioop import byteswap
 import sys
 import wave
@@ -103,5 +103,11 @@ class WavePCM32Test(WaveTest, unittest.TestCase):
         frames = byteswap(frames, 4)
 
 
+class MiscTestCase(unittest.TestCase):
+    def test__all__(self):
+        blacklist = {'WAVE_FORMAT_PCM'}
+        support.check__all__(self, wave, blacklist=blacklist)
+
+
 if __name__ == '__main__':
     unittest.main()