diff --git a/src/testdir/test_vim9_builtin.vim b/src/testdir/test_vim9_builtin.vim
index 7897db0..eba5ff6 100644
--- a/src/testdir/test_vim9_builtin.vim
+++ b/src/testdir/test_vim9_builtin.vim
@@ -204,14 +204,41 @@
   l->assert_equal([1, 2, 3])
 enddef
 
+def Test_ch_logfile()
+  assert_fails('ch_logfile(true)', 'E1174')
+  assert_fails('ch_logfile("foo", true)', 'E1174')
+enddef
+
 def Test_char2nr()
   char2nr('あ', true)->assert_equal(12354)
+
+  assert_fails('char2nr(true)', 'E1174')
+enddef
+
+def Test_charclass()
+  assert_fails('charclass(true)', 'E1174')
+enddef
+
+def Test_chdir()
+  assert_fails('chdir(true)', 'E1174')
 enddef
 
 def Test_col()
   new
   setline(1, 'asdf')
   col([1, '$'])->assert_equal(5)
+
+  assert_fails('col(true)', 'E1174')
+enddef
+
+def Test_confirm()
+  if !has('dialog_con') && !has('dialog_gui')
+    CheckFeature dialog_con
+  endif
+
+  assert_fails('call confirm(true)', 'E1174')
+  assert_fails('call confirm("yes", true)', 'E1174')
+  assert_fails('call confirm("yes", "maybe", 2, true)', 'E1174')
 enddef
 
 def Test_copy_return_type()
@@ -675,6 +702,10 @@
   var->assert_equal(['a', 'b'])
 enddef
 
+def Test_line()
+  assert_fails('line(true)', 'E1174')
+enddef
+
 def Test_list2str_str2list_utf8()
   var s = "\u3042\u3044"
   var l = [0x3042, 0x3044]