diff --git a/src/testdir/test_options.vim b/src/testdir/test_options.vim
index 02f5d7e..94c98fe 100644
--- a/src/testdir/test_options.vim
+++ b/src/testdir/test_options.vim
@@ -1728,7 +1728,7 @@
     qall
   [CODE]
   if RunVim([], after, '')
-    call assert_equal(['aAbBcCdDeEfFgHiIjJkKlLmMnoOpPqrRsStuvwWxXyZ$!%*-+<>#{|&/\.;',
+    call assert_equal(['aAbBcCdDeEfFgHiIjJkKlLmMnoOpPqrRsStuvwWxXyZz$!%*-+<>#{|&/\.;',
           \            'AS'], readfile('X_VIM_POSIX'))
   endif
 
@@ -1738,7 +1738,7 @@
     qall
   [CODE]
   if RunVim([], after, '')
-    call assert_equal(['aAbBcCdDeEfFgHiIjJkKlLmMnoOpPqrRsStuvwWxXyZ$!%*-+<>;',
+    call assert_equal(['aAbBcCdDeEfFgHiIjJkKlLmMnoOpPqrRsStuvwWxXyZz$!%*-+<>;',
           \            'S'], readfile('X_VIM_POSIX'))
   endif