diff --git a/src/testdir/test_crypt.vim b/src/testdir/test_crypt.vim
index 4af148513ae1d..d837f2760615d 100644
--- a/src/testdir/test_crypt.vim
+++ b/src/testdir/test_crypt.vim
@@ -394,6 +394,8 @@ endfunc
 
 func Test_crypt_set_key_segfault()
   CheckFeature sodium
+  " This test fails on Windows, why?
+  CheckNotMSWindows
 
   defer delete('Xtest2.txt')
   new Xtest2.txt