diff --git a/AutoRest/Generators/Python/Python.Tests/AcceptanceTests/custom_base_uri_tests.py b/AutoRest/Generators/Python/Python.Tests/AcceptanceTests/custom_base_uri_tests.py
index d1a49930ec386..91f326667558c 100644
--- a/AutoRest/Generators/Python/Python.Tests/AcceptanceTests/custom_base_uri_tests.py
+++ b/AutoRest/Generators/Python/Python.Tests/AcceptanceTests/custom_base_uri_tests.py
@@ -73,7 +73,7 @@ def test_custom_base_uri_negative(self):
             client.paths.get_empty("local")
 
     def test_custom_base_uri_more_optiopns(self):
-        client = AutoRestParameterizedCustomHostTestClient("test12", "host.:3000")
+        client = AutoRestParameterizedCustomHostTestClient("test12", "host:3000")
         client.paths.get_empty("http://lo", "cal", "key1")
 
 if __name__ == '__main__':