-ok($c == 2, 'len : get length 0');
-ok($b == 0, 'len : get length 0 correctly');
+is $c, 1, 'len: get array length 0 triggers magic correctly';
+is $b, 0, 'len: get array length 0 correctly';
+
+SKIP: {
+ skip 'length() no longer calls mg_len magic' => 5 if VMG_COMPAT_SCALAR_LENGTH_NOLEN;
+
+ $c = 0;
+ $n = 1 + int rand 1000;
+ # length magic on scalars needs also get magic to be triggered.
+ $wiz = wizard get => sub { return 'anything' },
+ len => sub { ++$c; return $n };
+
+ my $x = int rand 1000;
+
+ $c = 0;
+ cast $x, $wiz;
+ is $c, 0, 'len: cast on scalar doesn\'t trigger magic';
+
+ $c = 0;
+ $b = length $x;
+ is $c, 1, 'len: get scalar length triggers magic correctly';
+ is $b, $n, 'len: get scalar length correctly';
+
+ $n = 0;
+
+ $c = 0;
+ $b = length $x;
+ is $c, 1, 'len: get scalar length 0 triggers magic correctly';
+ is $b, $n, 'len: get scalar length 0 correctly';
+}