It is wonderfully relaxing to share a new Sitecore tip from the sofa in a holiday home ;-). So here is tip 28. I ran into this when creating custom workflows for a customer. They used several content tests on a page but after publishing the pages the tests did not seem to work.
After some research and looking at the sample workflows I quickly found out that tests requires a special step in your workflow. After all, they are also items. Stupid me! So if you create a custom workflow and use tests on your pages, include an approval step for the test. Look at the sample workflow of Sitecore on how to set this up.