diff --git a/src/testdir/test_signs.vim b/src/testdir/test_signs.vim
new file mode 100644
index 0000000..f280a31
--- /dev/null
+++ b/src/testdir/test_signs.vim
@@ -0,0 +1,106 @@
+" Test for signs
+
+if !has('signs')
+  finish
+endif
+
+func Test_sign()
+  new
+  call setline(1, ['a', 'b', 'c', 'd'])
+
+  sign define Sign1 text=x
+  sign define Sign2 text=y
+
+  " Test listing signs.
+  let a=execute('sign list')
+  call assert_equal("\nsign Sign1 text=x \nsign Sign2 text=y ", a)
+
+  let a=execute('sign list Sign1')
+  call assert_equal("\nsign Sign1 text=x ", a)
+
+  " Place the sign at line 3,then check that we can jump to it.
+  exe 'sign place 42 line=3 name=Sign1 buffer=' . bufnr('')
+  1
+  exe 'sign jump 42 buffer=' . bufnr('')
+  call assert_equal('c', getline('.'))
+
+  " Can't change sign.
+  call assert_fails("exe 'sign place 43 name=Sign1 buffer=' . bufnr('')", 'E885:')
+
+  let a=execute('sign place')
+  call assert_equal("\n--- Signs ---\nSigns for [NULL]:\n    line=3  id=42  name=Sign1\n", a)
+
+  " Unplace the sign and try jumping to it again should now fail.
+  sign unplace 42
+  1
+  call assert_fails("exe 'sign jump 42 buffer=' . bufnr('')", 'E157:')
+  call assert_equal('a', getline('.'))
+
+  " Unplace sign on current line.
+  exe 'sign place 43 line=4 name=Sign2 buffer=' . bufnr('')
+  4
+  sign unplace
+  let a=execute('sign place')
+  call assert_equal("\n--- Signs ---\n", a)
+  
+  " Try again to unplace sign on current line, it should fail this time.
+  call assert_fails('sign unplace', 'E159:')
+
+  " Unplace all signs.
+  exe 'sign place 42 line=3 name=Sign1 buffer=' . bufnr('')
+  sign unplace *
+  let a=execute('sign place')
+  call assert_equal("\n--- Signs ---\n", a)
+
+  " After undefining the sign, we should no longer be able to place it.
+  sign undefine Sign1
+  sign undefine Sign2
+  call assert_fails("exe 'sign place 42 line=3 name=Sign1 buffer=' . bufnr('')", 'E155:')
+
+endfunc
+
+func Test_sign_completion()
+  sign define Sign1 text=x
+  sign define Sign2 text=y
+
+  call feedkeys(":sign \<C-A>\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"sign define jump list place undefine unplace', @:)
+
+  call feedkeys(":sign define Sign \<C-A>\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"sign define Sign icon= linehl= text= texthl=', @:)
+
+  call feedkeys(":sign define Sign linehl=Spell\<C-A>\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"sign define Sign linehl=SpellBad SpellCap SpellLocal SpellRare', @:)
+
+  call feedkeys(":sign undefine \<C-A>\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"sign undefine Sign1 Sign2', @:)
+
+  call feedkeys(":sign place 1 \<C-A>\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"sign place 1 buffer= file= line= name=', @:)
+
+  call feedkeys(":sign place 1 name=\<C-A>\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"sign place 1 name=Sign1 Sign2', @:)
+
+  call feedkeys(":sign unplace 1 \<C-A>\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"sign unplace 1 buffer= file=', @:)
+
+  call feedkeys(":sign list \<C-A>\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"sign list Sign1 Sign2', @:)
+
+  call feedkeys(":sign jump 1 \<C-A>\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"sign jump 1 buffer= file=', @:)
+
+  sign undefine Sign1
+  sign undefine Sign2
+
+endfunc
+
+func Test_sign_invalid_commands()
+  call assert_fails('sign', 'E471:')
+  call assert_fails('sign xxx', 'E160:')
+  call assert_fails('sign define', 'E156:')
+  call assert_fails('sign undefine', 'E156:')
+  call assert_fails('sign list xxx', 'E155:')
+  call assert_fails('sign place 1 buffer=', 'E158:')
+  call assert_fails('sign define Sign2 text=', 'E239:')
+endfunc