Update missed test

Author: ammaraskar

Lib/test/test_importlib/source/test_file_loader.py

@@ -635,7 +635,7 @@ def test_bad_marshal(self):
     def test_old_timestamp(self):
         # When the timestamp is older than the source, bytecode should be
         # regenerated.
-        zeros = b'\x00\x00\x00\x00'
+        zeros = b'\x00\x00\x00\x00\x00\x00\x00\x00'
         with util.create_modules('_temp') as mapping:
             py_compile.compile(mapping['_temp'])
             bytecode_path = self.util.cache_from_source(mapping['_temp'])
@@ -644,10 +644,10 @@ def test_old_timestamp(self):
                 bytecode_file.write(zeros)
             self.import_(mapping['_temp'], '_temp')
             source_mtime = os.path.getmtime(mapping['_temp'])
-            source_timestamp = self.importlib._pack_uint32(source_mtime)
+            source_timestamp = self.importlib._pack_uint64(source_mtime)
             with open(bytecode_path, 'rb') as bytecode_file:
                 bytecode_file.seek(8)
-                self.assertEqual(bytecode_file.read(4), source_timestamp)
+                self.assertEqual(bytecode_file.read(8), source_timestamp)
 
     # [bytecode read-only]
     @util.writes_bytecode_files