diff --git a/distributed/utils_test.py b/distributed/utils_test.py
index 9770bd2cd78..d218fadd39a 100644
--- a/distributed/utils_test.py
+++ b/distributed/utils_test.py
@@ -981,7 +981,7 @@ async def coro():
                             while not task.cancelled():
                                 await asyncio.sleep(0.01)
                             raise TimeoutError(
-                                f"Test timeout.\n{buffer.getvalue()}"
+                                f"Test timeout after {timeout}s.\n{buffer.getvalue()}"
                             ) from None
                         finally:
                             if client and c.status not in ("closing", "closed"):