--- a/testing/mochitest/runtests.pl.in
+++ b/testing/mochitest/runtests.pl.in
@@ -553,27 +553,24 @@ sub runTests {
   if ($is_win32) {
     $profile_arg = winPathFromDir($profile_dir);
   }
 
   # now run with the profile we created
 
   # On Windows and Linux, the application is focused for us. On OS X, we
   # need to use applescript to focus the app and then set the url.
-  my $rc = 0;
-if (0) {
   my $rc = -1;
   if (!$is_mac) {
     my @runargs = ($app, '-no-remote', '-profile', $profile_arg);
     push(@runargs, $test_url);
     $rc = 0xffff & system @runargs;
   } else {
     $rc = executeMac($profile_arg, $test_url);
   }
-}
 
   if ($rc != 0) {
     print "FAIL Exited with code $rc during test run\n";
   }
 
   return $test_start;
 }