diff --git a/test/test_functions.py b/test/test_functions.py
index 573bfb5bf..f27414637 100644
--- a/test/test_functions.py
+++ b/test/test_functions.py
@@ -26,7 +26,7 @@ def test_alias_h():
 
 @ray.remote([], [])
 def empty_function():
-  return ()
+  pass
 
 @ray.remote([], [int])
 def trivial_function():