1 files changed, 16 insertions, 0 deletions
diff --git a/Lib/test/test_zipimport.py b/Lib/test/test_zipimport.py
index d4f619e9ac..2af8689c1d 100644
--- a/Lib/test/test_zipimport.py
+++ b/Lib/test/test_zipimport.py
@@ -6,6 +6,7 @@ import importlib.util
 import struct
 import time
 import unittest
+import unittest.mock
 
 from test import support
 
@@ -204,6 +205,21 @@ class UncompressedZipImportTestCase(ImportHooksBaseTestCase):
             self.assertEqual(mod.state, 'old')
         self.doTest(None, files, TESTMOD, call=check)
 
+    @unittest.mock.patch('_imp.check_hash_based_pycs', 'always')
+    def test_checked_hash_based_change_pyc(self):
+        source = b"state = 'old'"
+        source_hash = importlib.util.source_hash(source)
+        bytecode = importlib._bootstrap_external._code_to_hash_pyc(
+            compile(source, "???", "exec"),
+            source_hash,
+            False,
+        )
+        files = {TESTMOD + ".py": (NOW, "state = 'new'"),
+                 TESTMOD + ".pyc": (NOW - 20, bytecode)}
+        def check(mod):
+            self.assertEqual(mod.state, 'new')
+        self.doTest(None, files, TESTMOD, call=check)
+
     def testEmptyPy(self):
         files = {TESTMOD + ".py": (NOW, "")}
         self.doTest(None, files, TESTMOD)