fix unit test
diff --git a/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/factory/DefaultComponentsDiffValidatorFactoryTest.java b/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/factory/DefaultComponentsDiffValidatorFactoryTest.java
index fc98e19..5652cb7 100644
--- a/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/factory/DefaultComponentsDiffValidatorFactoryTest.java
+++ b/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/factory/DefaultComponentsDiffValidatorFactoryTest.java
@@ -38,7 +38,7 @@
   @Test
   public void create() {
     List<ComponentsDiffValidator> validators = validatorFactory.create();
-    assertThat(validators).hasSize(7);
+    assertThat(validators).hasSize(6);
   }
 }