diff --git a/test/old/testdir/test_window_cmd.vim b/test/old/testdir/test_window_cmd.vim
index 50da2beb40..8048fa6ff8 100644
--- a/test/old/testdir/test_window_cmd.vim
+++ b/test/old/testdir/test_window_cmd.vim
@@ -539,7 +539,7 @@ func Test_equalalways_on_close()
   1wincmd w
   split
   4wincmd w
-  resize + 5
+  resize +5
   " left column has three windows, equalized heights.
   " right column has two windows, top one a bit higher
   let height_1 = winheight(1)