diff --git a/src/testdir/test_hardcopy.vim b/src/testdir/test_hardcopy.vim
index 4629d17..ea9790d 100644
--- a/src/testdir/test_hardcopy.vim
+++ b/src/testdir/test_hardcopy.vim
@@ -23,6 +23,10 @@
   set printoptions=formfeed:y
   set printoptions=
   set printoptions&
+
+  call assert_fails('set printoptions=paper', 'E550:')
+  call assert_fails('set printoptions=shredder:on', 'E551:')
+  call assert_fails('set printoptions=left:no', 'E552:')
 endfunc
 
 func Test_printmbfont_parsing()