Real-life soap opera test
Soap opera tests exaggerate and complicate scenarios in the way that television soap operas exaggerate and complicate real life. Jason Gorman describes something that happened to him that might have been caught by a soap opera test. (It shares the “upgrade happens in the middle of something else” property of the example at the link.)
A couple of years back, I lost my wallet on the way to an off-site meeting with a client.
I called my credit card company to ask them to cancel my card and send me a replacement. It just so happens at that very moment a replacement card was already on its way to me in the post because I’d been upgraded to a gold card.
They canceled the gold card. And didn’t send a replacement card because a replacement card was already on its way.
More on soap opera testing here.