We have included the oppotunity of pilot testing your test before sharing it with your participants - you find it under Share. This makes it possible for you to test that everything works as planned on the chosen device.
We have also made it possible to assess the data coming in from your pilot test, you find it under Analytics. Use this option to make sure, you are collecting the metrics you need. You can delete the pilot test data by one click and then you are ready to share the test with your participants. Note, that you always have the oppotunity of deleting the pilot data, so no worries if you forget before sharing the test.
Let us know what you think - happy testing!