diff --git a/locust/test/test_http.py b/locust/test/test_http.py
index d2c2f2e83e..9b149740ed 100644
--- a/locust/test/test_http.py
+++ b/locust/test/test_http.py
@@ -256,7 +256,7 @@ def test_catch_response_default_fail(self):
 
     def test_user_context(self):
         class TestUser(HttpUser):
-            host = "http://localhost"
+            host = f"http://127.0.0.1:{self.port}"
 
             def context(self):
                 return {"user": self.username}