Update test

Author: markshannon

Lib/test/test_fstring.py

@@ -627,7 +627,8 @@ def test_mismatched_parens(self):
                             r"does not match opening parenthesis '\('",
                             ["f'{a(4}'",
                             ])
-        self.assertRaises(SyntaxError, eval, "f'{" + "("*500 + "}'")
+        self.assertRaises(SyntaxError, eval, "f'{" + "("*100 + "}'")
+        self.assertRaises(MemoryError, eval, "f'{" + "("*500 + "}'")
 
     @unittest.skipIf(support.is_wasi, "exhausts limited stack on WASI")
     def test_fstring_nested_too_deeply(self):