diff --git a/src/testdir/test_functions.vim b/src/testdir/test_functions.vim
index 131db10..d0508ce 100644
--- a/src/testdir/test_functions.vim
+++ b/src/testdir/test_functions.vim
@@ -1484,7 +1484,8 @@
   call assert_equal(0, col([1, 100]))
   call assert_equal(0, col([1]))
   call assert_equal(0, col(test_null_list()))
-  call assert_fails('let c = col({})', 'E731:')
+  call assert_fails('let c = col({})', 'E1222:')
+  call assert_fails('let c = col(".", [])', 'E1210:')
 
   " test for getting the visual start column
   func T()
@@ -1514,6 +1515,15 @@
   call assert_equal(4, col('.'))
   set virtualedit&
 
+  " Test for getting the column number in another window
+  let winid = win_getid()
+  new
+  call win_execute(winid, 'normal 1G$')
+  call assert_equal(3, col('.', winid))
+  call win_execute(winid, 'normal 2G')
+  call assert_equal(8, col('$', winid))
+  call assert_equal(0, col('.', 5001))
+
   bw!
 endfunc