fix the test_fleet_lars_meta_optimizer ut. (#27291)

python/paddle/fluid/tests/unittests/test_fleet_lamb_meta_optimizer.py

@@ -141,7 +141,7 @@ class TestFleetLambMetaOptimizer(unittest.TestCase):
         ops = [op.type for op in avg_cost.block.ops]
         self.assertIn('lamb', ops)
         self.assertIn('cast', ops)
-        self.assertIn('isfinite', ops)
+        self.assertIn('check_finite_and_unscale', ops)
 
 
 if __name__ == "__main__":

python/paddle/fluid/tests/unittests/test_fleet_lars_meta_optimizer.py

@@ -145,7 +145,7 @@ class TestFleetLarsMetaOptimizer(unittest.TestCase):
         ops = [op.type for op in avg_cost.block.ops]
         self.assertIn('lars_momentum', ops)
         self.assertIn('cast', ops)
-        self.assertIn('isfinite', ops)
+        self.assertIn('check_finite_and_unscale', ops)
 
 
 if __name__ == "__main__":