diff --git a/docs/topics/testing/tools.txt b/docs/topics/testing/tools.txt
index 068e452ad0..cd05db2cf8 100644
--- a/docs/topics/testing/tools.txt
+++ b/docs/topics/testing/tools.txt
@@ -2187,8 +2187,8 @@ redirected into a ``StringIO`` instance::
     class ClosepollTest(TestCase):
         def test_command_output(self):
             out = StringIO()
-            call_command("closepoll", stdout=out)
-            self.assertIn("Expected output", out.getvalue())
+            call_command("closepoll", poll_ids=[1], stdout=out)
+            self.assertIn('Successfully closed poll "1"', out.getvalue())
 
 .. _skipping-tests: