diff --git a/sanic/app.py b/sanic/app.py
index 477fb6d6..500a6d45 100644
--- a/sanic/app.py
+++ b/sanic/app.py
@@ -835,10 +835,8 @@ class Sanic:
         access_log=True,
         **kwargs
     ):
-        try:
-            assert "loop" not in kwargs
-        except AssertionError:
-            raise TypeError("loop is not a valid argument. For asynchronous support, check https://sanic.readthedocs.io/en/latest/sanic/deploying.html#asynchronous-support")
+        if "loop" in kwargs:
+            raise TypeError("loop is not a valid argument. To use an existing loop, change to create_server().\nSee more: https://sanic.readthedocs.io/en/latest/sanic/deploying.html#asynchronous-support")
 
         """Run the HTTP Server and listen until keyboard interrupt or term
         signal. On termination, drain connections before closing.