1 files changed, 11 insertions, 1 deletions
diff --git a/test/functional/ui/sign_spec.lua b/test/functional/ui/sign_spec.lua
index af03bce4a0..847a918dc9 100644
--- a/test/functional/ui/sign_spec.lua
+++ b/test/functional/ui/sign_spec.lua
@@ -1,6 +1,7 @@
 local helpers = require('test.functional.helpers')(after_each)
 local Screen = require('test.functional.ui.screen')
-local clear, feed, exec, api = helpers.clear, helpers.feed, helpers.exec, helpers.api
+local api, clear, eq = helpers.api, helpers.clear, helpers.eq
+local eval, exec, feed = helpers.eval, helpers.exec, helpers.feed
 
 describe('Signs', function()
   local screen
@@ -565,4 +566,13 @@ describe('Signs', function()
                                                            |
     ]])
   end)
+
+  it('sign_undefine() frees all signs', function()
+    exec([[
+      sign define 1 text=1
+      sign define 2 text=2
+      call sign_undefine()
+    ]])
+    eq({}, eval('sign_getdefined()'))
+  end)
 end)