diff --git a/tests/bento_service_examples/example_bento_service.py b/tests/bento_service_examples/example_bento_service.py
index bf210fb8164..05ec49c4a24 100644
--- a/tests/bento_service_examples/example_bento_service.py
+++ b/tests/bento_service_examples/example_bento_service.py
@@ -1,10 +1,5 @@
 import bentoml
-from bentoml.adapters import (
-    DataframeInput,
-    ImageInput,
-    JsonInput,
-    MultiImageInput,
-)
+from bentoml.adapters import DataframeInput, ImageInput, JsonInput, MultiImageInput
 from bentoml.handlers import DataframeHandler  # deprecated
 from bentoml.service.artifacts.pickle import PickleArtifact
 
@@ -49,3 +44,9 @@ def predict_multi_images(self, original, compared):
     @bentoml.api(input=JsonInput(), batch=True)
     def predict_json(self, input_data):
         return self.artifacts.model.predict_json(input_data)
+
+    @bentoml.api(
+        route="v1!@$%^&*()_-+=[]\\|;:,./predict", input=JsonInput(), batch=True,
+    )
+    def customize_route(self, input_data):
+        return input_data
diff --git a/tests/integration/api_server/example_service.py b/tests/integration/api_server/example_service.py
index 644a225bc6f..da34f9b6e5d 100644
--- a/tests/integration/api_server/example_service.py
+++ b/tests/integration/api_server/example_service.py
@@ -81,7 +81,7 @@ def predict_json(self, input_datas):
         return self.artifacts.model.predict_json(input_datas)
 
     @bentoml.api(
-        route="/$~!@%^&*()_-+=[]\\|;:,./predict_json", input=JsonInput(), batch=True,
+        route="$~!@%^&*()_-+=[]\\|;:,./predict_json", input=JsonInput(), batch=True,
     )
     def customezed_route(self, input_datas):
         return input_datas
diff --git a/tests/integration/api_server/test_meta.py b/tests/integration/api_server/test_meta.py
index 6d9b6590c1b..85962f96b6e 100644
--- a/tests/integration/api_server/test_meta.py
+++ b/tests/integration/api_server/test_meta.py
@@ -13,6 +13,17 @@ async def test_api_server_meta(host):
 
 @pytest.mark.asyncio
 async def test_customized_route(host):
+    def path_in_docs(response_body):
+        d = json.loads(response_body.decode())
+        return "/v1!@$%^&*()_-+=[]\\|;:,./predict" in d['paths']
+
+    await pytest.assert_request(
+        "GET",
+        f"http://{host}/docs.json",
+        headers=(("Content-Type", "application/json"),),
+        assert_data=path_in_docs,
+    )
+
     await pytest.assert_request(
         "POST",
         f"http://{host}/$~!@%^&*()_-+=[]\\|;:,./predict_json",
diff --git a/tests/server/test_model_api_server.py b/tests/server/test_model_api_server.py
index 7b4be2ffecf..ae3e05a7155 100644
--- a/tests/server/test_model_api_server.py
+++ b/tests/server/test_model_api_server.py
@@ -29,6 +29,12 @@ def test_api_function_route(bento_service, img_file):
 
     response = test_client.get("/docs.json")
     assert 200 == response.status_code
+    docs = json.loads(response.data.decode())
+    assert "/v1!@$%^&*()_-+=[]\\|;:,./predict" in docs["paths"]
+
+    response = test_client.post("/v1!@$%^&*()_-+=[]\\|;:,./predict", data='{"a": 1}',)
+    assert 200 == response.status_code
+    assert '{"a": 1}' == str(response.data)
 
     assert "predict_dataframe" in index_list
     data = [{"col1": 10}, {"col1": 20}]