diff --git a/tests/async/test_browsercontext_route.py b/tests/async/test_browsercontext_route.py
index 5f4140b637..d629be467c 100644
--- a/tests/async/test_browsercontext_route.py
+++ b/tests/async/test_browsercontext_route.py
@@ -331,7 +331,7 @@ async def test_should_override_post_body_with_empty_string(
         ),
     )
 
-    assert req[0].post_body == ""
+    assert req[0].post_body == b""
 
 
 async def test_should_chain_fallback(