diff --git a/src/testdir/test_cmdline.vim b/src/testdir/test_cmdline.vim
index e7752cc..98af482 100644
--- a/src/testdir/test_cmdline.vim
+++ b/src/testdir/test_cmdline.vim
@@ -609,20 +609,16 @@
   call feedkeys(":language \<c-a>\<c-b>\"\<cr>", 'tx')
   call assert_match('^"language .*\<ctype\>.*\<messages\>.*\<time\>', @:)
 
-  if has('unix')
-    " TODO: these tests don't work on Windows. lang appears to be 'C'
-    " but C does not appear in the completion. Why?
-    call assert_match('^"language .*\<' . lang . '\>', @:)
+  call assert_match('^"language .*\<' . lang . '\>', @:)
 
-    call feedkeys(":language messages \<c-a>\<c-b>\"\<cr>", 'tx')
-    call assert_match('^"language .*\<' . lang . '\>', @:)
+  call feedkeys(":language messages \<c-a>\<c-b>\"\<cr>", 'tx')
+  call assert_match('^"language .*\<' . lang . '\>', @:)
 
-    call feedkeys(":language ctype \<c-a>\<c-b>\"\<cr>", 'tx')
-    call assert_match('^"language .*\<' . lang . '\>', @:)
+  call feedkeys(":language ctype \<c-a>\<c-b>\"\<cr>", 'tx')
+  call assert_match('^"language .*\<' . lang . '\>', @:)
 
-    call feedkeys(":language time \<c-a>\<c-b>\"\<cr>", 'tx')
-    call assert_match('^"language .*\<' . lang . '\>', @:)
-  endif
+  call feedkeys(":language time \<c-a>\<c-b>\"\<cr>", 'tx')
+  call assert_match('^"language .*\<' . lang . '\>', @:)
 endfunc
 
 func Test_cmdline_complete_env_variable()