diff --git a/src/testdir/test_highlight.vim b/src/testdir/test_highlight.vim
index 6e39d4e..af60503 100644
--- a/src/testdir/test_highlight.vim
+++ b/src/testdir/test_highlight.vim
@@ -878,7 +878,7 @@
   hi clear
 endfunc
 
-" Test for 'ctermul in a highlight group
+" Test for 'ctermul' in a highlight group
 func Test_highlight_ctermul()
   CheckNotGui
   call assert_notmatch('ctermul=', HighlightArgs('Normal'))