diff --git a/samples/openapi3/client/petstore/python-lazyImports/tests/test_api_validation.py b/samples/openapi3/client/petstore/python-lazyImports/tests/test_api_validation.py
index da1634eecebc..d0ffe5f70dbd 100644
--- a/samples/openapi3/client/petstore/python-lazyImports/tests/test_api_validation.py
+++ b/samples/openapi3/client/petstore/python-lazyImports/tests/test_api_validation.py
@@ -40,12 +40,6 @@ def setUpModels(self):
         self.pet.category = self.category
         self.pet.tags = [self.tag]
 
-    def test_set_param_validation(self):
-        try:
-            self.pet_api.find_pets_by_tags(["a", "a"])
-        except ValidationError as e:
-            self.assertTrue("the list has duplicated items" in str(e))
-
     def test_required_param_validation(self):
         try:
             self.pet_api.get_pet_by_id()  # type: ignore
diff --git a/samples/openapi3/client/petstore/python-pydantic-v1/tests/test_api_validation.py b/samples/openapi3/client/petstore/python-pydantic-v1/tests/test_api_validation.py
index d4c89e23946d..81ffe035470c 100644
--- a/samples/openapi3/client/petstore/python-pydantic-v1/tests/test_api_validation.py
+++ b/samples/openapi3/client/petstore/python-pydantic-v1/tests/test_api_validation.py
@@ -47,10 +47,10 @@ def setUpModels(self):
         self.pet.tags = [self.tag]
 
     def test_set_param_validation(self):
-        try:
+        with self.assertRaisesRegex(
+            ValidationError, "the list has duplicated items"
+        ):
             self.pet_api.find_pets_by_tags(["a", "a"])
-        except ValidationError as e:
-            self.assertTrue("the list has duplicated items" in str(e))
 
     def test_required_param_validation(self):
         try:
diff --git a/samples/openapi3/client/petstore/python/tests/test_api_validation.py b/samples/openapi3/client/petstore/python/tests/test_api_validation.py
index da1634eecebc..d0ffe5f70dbd 100644
--- a/samples/openapi3/client/petstore/python/tests/test_api_validation.py
+++ b/samples/openapi3/client/petstore/python/tests/test_api_validation.py
@@ -40,12 +40,6 @@ def setUpModels(self):
         self.pet.category = self.category
         self.pet.tags = [self.tag]
 
-    def test_set_param_validation(self):
-        try:
-            self.pet_api.find_pets_by_tags(["a", "a"])
-        except ValidationError as e:
-            self.assertTrue("the list has duplicated items" in str(e))
-
     def test_required_param_validation(self):
         try:
             self.pet_api.get_pet_by_id()  # type: ignore