diff --git a/src/testdir/test_popupwin.vim b/src/testdir/test_popupwin.vim
index 9370a11..654501b 100644
--- a/src/testdir/test_popupwin.vim
+++ b/src/testdir/test_popupwin.vim
@@ -913,6 +913,10 @@
   call assert_fails('call win_execute(winid, "next")', 'E994:')
   call assert_fails('call win_execute(winid, "rewind")', 'E994:')
   call assert_fails('call win_execute(winid, "buf")', 'E994:')
+  call assert_fails('call win_execute(winid, "bnext")', 'E994:')
+  call assert_fails('call win_execute(winid, "bprev")', 'E994:')
+  call assert_fails('call win_execute(winid, "bfirst")', 'E994:')
+  call assert_fails('call win_execute(winid, "blast")', 'E994:')
   call assert_fails('call win_execute(winid, "edit")', 'E994:')
   call assert_fails('call win_execute(winid, "enew")', 'E994:')
   call assert_fails('call win_execute(winid, "wincmd x")', 'E994:')