Fix tests

Co-authored-by: Brandt Bucher <[email protected]>

Author: tomasr8

Lib/test/test_capi/test_opt.py

@@ -1954,7 +1954,7 @@ def testfunc(n):
         self.assertIsNotNone(ex)
         uops = get_opnames(ex)
         self.assertIn("_CALL_ISINSTANCE", uops)
-        self.assertNotIn("_GUARD_CALLABLE_ISINSTANCE_NULL", uops)
+        self.assertNotIn("_GUARD_THIRD_NULL", uops)
         self.assertNotIn("_GUARD_CALLABLE_ISINSTANCE", uops)