diff --git a/src/testdir/test_vim9_builtin.vim b/src/testdir/test_vim9_builtin.vim
index 298a3be..1bdb12b 100644
--- a/src/testdir/test_vim9_builtin.vim
+++ b/src/testdir/test_vim9_builtin.vim
@@ -402,6 +402,9 @@
   var l = [3, 2, 1]
   call('reverse', [l])
   l->assert_equal([1, 2, 3])
+
+  CheckDefExecAndScriptFailure(['call(123, [2])'], 'E1256: String or function required for argument 1')
+  CheckDefExecAndScriptFailure(['call(true, [2])'], 'E1256: String or function required for argument 1')
   CheckDefAndScriptFailure(['call("reverse", 2)'], ['E1013: Argument 2: type mismatch, expected list<any> but got number', 'E1211: List required for argument 2'])
   CheckDefAndScriptFailure(['call("reverse", [2], [1])'], ['E1013: Argument 3: type mismatch, expected dict<any> but got list<number>', 'E1206: Dictionary required for argument 3'])
 enddef