Add test for running children asynchronously

test/child_ordering_async.js

@@ -0,0 +1,15 @@
+var test = require('../');
+
+test('parent', function (t) {
+  var parentFinished = false;
+  setTimeout(function () {
+    t.pass('pass parent test');
+    parentFinished = true;
+    t.end();
+  })
+
+  t.test('child', function (t) {
+    t.ok(parentFinished, 'parent should finish before child runs');
+    t.end();
+  })
+})