Taking apart a test

As I've seen a ton on here, when taking a test apart...Everyone says it makes it invalid. While this is true, it is not true for ALL tests. For any test that has a clear plastic protective strip on it, yes this holds true, but for the Wal-Mart 88 cent ones and the dollar store ones, this is not. Those are just test strips in a cassette. Exposed to air and everything!

Just wanted to leave a few of you ladies with BFP tests out of cassette strips to know that your test is in fact, NOT invalid. :)