Well here is another word I keep spelling wrong. So here is an idea of how to remember it.
One way to think of testament is an agreement between man and God. So I think: If MEN can do A certain TEST, God will do such and such. TEST – A – MEN- t.
Please feel free to share additional suggestions you what might be a better way to remember the spelling of this word, You can leave on the comment section for the blog. Thanks.