Pregnancy test

Took A test last night negative

Took a test this morning and definitely peed enough on the stick and it didn’t come with anything Invalid test. Does that mean I shouldn’t trust the results of the first test? Meaning the whole box of tests could be faulty? It’s a cheap brand. Decided to test in morning for more of accurate pee but now I did that and invalid will my next pee of the day be good enough to test?