diff --git a/src/testdir/test_sleep.vim b/src/testdir/test_sleep.vim
index f71855f..a428f38 100644
--- a/src/testdir/test_sleep.vim
+++ b/src/testdir/test_sleep.vim
@@ -21,6 +21,7 @@
   call s:assert_takes_longer('sl 50m', 50)
   call s:assert_takes_longer('sl! 50m', 50)
   call s:assert_takes_longer('1sleep', 1000)
+  call s:assert_takes_longer('normal 1gs', 1000)
 endfunc
 
 " vim: shiftwidth=2 sts=2 expandtab