diff --git a/src/testdir/test_listener.vim b/src/testdir/test_listener.vim
index a318d52..ed501c2 100644
--- a/src/testdir/test_listener.vim
+++ b/src/testdir/test_listener.vim
@@ -225,3 +225,20 @@
   exe "buf " .. bufnr
   bwipe!
 endfunc
+
+func Test_listener_garbage_collect()
+  func MyListener(x, bufnr, start, end, added, changes)
+    " NOP
+  endfunc
+
+  new
+  let id = listener_add(function('MyListener', [{}]), bufnr(''))
+  call test_garbagecollect_now()
+  " must not crach caused by invalid memory access
+  normal ia
+  call assert_true(v:true)
+
+  call listener_remove(id)
+  delfunc MyListener
+  bwipe!
+endfunc
diff --git a/src/testdir/test_popupwin.vim b/src/testdir/test_popupwin.vim
index 451f0b6..c332dca 100644
--- a/src/testdir/test_popupwin.vim
+++ b/src/testdir/test_popupwin.vim
@@ -1467,3 +1467,19 @@
 
   call popup_close(winid)
 endfunc
+
+func Test_popupwin_garbage_collect()
+  func MyPopupFilter(x, winid, c)
+    " NOP
+  endfunc
+
+  let winid = popup_create('something', {'filter': function('MyPopupFilter', [{}])})
+  call test_garbagecollect_now()
+  redraw
+  " Must not crach caused by invalid memory access
+  call feedkeys('j', 'xt')
+  call assert_true(v:true)
+
+  call popup_close(winid)
+  delfunc MyPopupFilter
+endfunc
diff --git a/src/testdir/test_prompt_buffer.vim b/src/testdir/test_prompt_buffer.vim
index 58be50b..028f337 100644
--- a/src/testdir/test_prompt_buffer.vim
+++ b/src/testdir/test_prompt_buffer.vim
@@ -102,3 +102,24 @@
   call StopVimInTerminal(buf)
   call delete(scriptName)
 endfunc
+
+func Test_prompt_garbage_collect()
+  func MyPromptCallback(x, text)
+    " NOP
+  endfunc
+  func MyPromptInterrupt(x)
+    " NOP
+  endfunc
+
+  new
+  set buftype=prompt
+  call prompt_setcallback(bufnr(''), function('MyPromptCallback', [{}]))
+  call prompt_setinterrupt(bufnr(''), function('MyPromptInterrupt', [{}]))
+  call test_garbagecollect_now()
+  " Must not crash
+  call feedkeys("\<CR>\<C-C>", 'xt')
+  call assert_true(v:true)
+
+  delfunc MyPromptCallback
+  bwipe!
+endfunc