diff --git a/test/old/testdir/test_excmd.vim b/test/old/testdir/test_excmd.vim
index 44bed890f5..15c83709ad 100644
--- a/test/old/testdir/test_excmd.vim
+++ b/test/old/testdir/test_excmd.vim
@@ -237,7 +237,6 @@ endfunc
 
 " Test for the :language command
 func Test_language_cmd()
-  CheckNotMSWindows  " FIXME: why does this fail on Windows CI?
   CheckFeature multi_lang
 
   call assert_fails('language ctype non_existing_lang', 'E197:')
diff --git a/test/old/testdir/test_sort.vim b/test/old/testdir/test_sort.vim
index 534393b724..94a35e3cb5 100644
--- a/test/old/testdir/test_sort.vim
+++ b/test/old/testdir/test_sort.vim
@@ -12,7 +12,6 @@ func Compare2(a, b) abort
 endfunc
 
 func Test_sort_strings()
-  CheckNotMSWindows  " FIXME: Why does this fail with MSVC?
   " numbers compared as strings
   call assert_equal([1, 2, 3], sort([3, 2, 1]))
   call assert_equal([13, 28, 3], sort([3, 28, 13]))
diff --git a/test/old/testdir/test_spell_utf8.vim b/test/old/testdir/test_spell_utf8.vim
index 7c588d736a..91ada1ed38 100644
--- a/test/old/testdir/test_spell_utf8.vim
+++ b/test/old/testdir/test_spell_utf8.vim
@@ -624,7 +624,6 @@ endfunc
 
 " Test affix flags with two characters
 func Test_spell_affix()
-  CheckNotMSWindows  " FIXME: Why does this fail with MSVC?
   call LoadAffAndDic(g:test_data_aff5, g:test_data_dic5)
   call RunGoodBad("fooa1 fooa\u00E9 bar prebar barbork prebarbork  startprebar start end startend  startmiddleend nouend",
         \ "bad: foo fooa2 prabar probarbirk middle startmiddle middleend endstart startprobar startnouend",