diff --git a/src/testdir/test_assert.vim b/src/testdir/test_assert.vim
index 8359eb1..29c8534 100644
--- a/src/testdir/test_assert.vim
+++ b/src/testdir/test_assert.vim
@@ -111,6 +111,16 @@
   call remove(v:errors, 0)
 endfunc
 
+func Test_assert_beeps()
+  new
+  call assert_beeps('normal h')
+
+  call assert_beeps('normal 0')
+  call assert_match("command did not beep: normal 0", v:errors[0])
+  call remove(v:errors, 0)
+  bwipe
+endfunc
+
 func Test_assert_inrange()
   call assert_inrange(7, 7, 7)
   call assert_inrange(5, 7, 5)
diff --git a/src/testdir/test_normal.vim b/src/testdir/test_normal.vim
index 27c5897..2d1446b 100644
--- a/src/testdir/test_normal.vim
+++ b/src/testdir/test_normal.vim
@@ -2177,6 +2177,8 @@
 
 func! Test_normal45_drop()
   if !has('dnd')
+    " The ~ register does not exist
+    call assert_beeps('norm! "~')
     return
   endif