diff --git a/src/testdir/test_autocmd.vim b/src/testdir/test_autocmd.vim
index dfeb93f..3dc4960 100644
--- a/src/testdir/test_autocmd.vim
+++ b/src/testdir/test_autocmd.vim
@@ -5463,4 +5463,20 @@
   %bw!
 endfunc
 
+func Test_eventignore_subtract()
+  set eventignore=all,-WinEnter
+  augroup testing
+    autocmd!
+    autocmd WinEnter * ++once let s:triggered = 1
+  augroup END
+
+  new
+  call assert_equal(1, s:triggered)
+
+  set eventignore&
+  unlet! s:triggered
+  call CleanUpTestAuGroup()
+  %bw!
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab