3 files changed, 13 insertions, 2 deletions
diff --git a/src/nvim/testdir/test_arglist.vim b/src/nvim/testdir/test_arglist.vim
index ca7c8574cb..e2a859a5da 100644
--- a/src/nvim/testdir/test_arglist.vim
+++ b/src/nvim/testdir/test_arglist.vim
@@ -420,6 +420,8 @@ func Test_argdelete()
   call assert_equal(['b'], argv())
   call assert_fails('argdelete', 'E610:')
   call assert_fails('1,100argdelete', 'E16:')
+  call assert_fails('argdel /\)/', 'E55:')
+  call assert_fails('1argdel 1', 'E474:')
 
   call Reset_arglist()
   args a b c d
@@ -472,13 +474,16 @@ func Test_arglist_autocmd()
   new
   " redefine arglist; go to Xxx1
   next! Xxx1 Xxx2 Xxx3
-  " open window for all args
+  " open window for all args; Reading Xxx2 will change the arglist and the
+  " third window will get Xxx1:
+  "   win 1: Xxx1
+  "   win 2: Xxx2
+  "   win 3: Xxx1
   all
   call assert_equal('test file Xxx1', getline(1))
   wincmd w
   wincmd w
   call assert_equal('test file Xxx1', getline(1))
-  " should now be in Xxx2
   rewind
   call assert_equal('test file Xxx2', getline(1))
 
diff --git a/src/nvim/testdir/test_cmdline.vim b/src/nvim/testdir/test_cmdline.vim
index 7aac731709..f95970223f 100644
--- a/src/nvim/testdir/test_cmdline.vim
+++ b/src/nvim/testdir/test_cmdline.vim
@@ -912,6 +912,10 @@ func Test_cmdline_complete_various()
   call feedkeys(":doautocmd User MyCmd a.c\<C-A>\<C-B>\"\<CR>", 'xt')
   call assert_equal("\"doautocmd User MyCmd a.c\<C-A>", @:)
 
+  " completion of autocmd group after comma
+  call feedkeys(":doautocmd BufNew,BufEn\<C-A>\<C-B>\"\<CR>", 'xt')
+  call assert_equal("\"doautocmd BufNew,BufEnter", @:)
+
   " completion for the :augroup command
   augroup XTest
   augroup END
diff --git a/src/nvim/testdir/test_listdict.vim b/src/nvim/testdir/test_listdict.vim
index aa66d86af1..2f4e1db4a1 100644
--- a/src/nvim/testdir/test_listdict.vim
+++ b/src/nvim/testdir/test_listdict.vim
@@ -649,6 +649,8 @@ func Test_reduce()
   call assert_fails("call reduce({}, { acc, val -> acc + val }, 1)", 'E897:')
   call assert_fails("call reduce(0, { acc, val -> acc + val }, 1)", 'E897:')
   call assert_fails("call reduce('', { acc, val -> acc + val }, 1)", 'E897:')
+  call assert_fails("call reduce([1, 2], 'Xdoes_not_exist')", 'E117:')
+  call assert_fails("echo reduce(0z01, { acc, val -> 2 * acc + val }, '')", 'E39:')
 
   let g:lut = [1, 2, 3, 4]
   func EvilRemove()