You store them in the same place where you place other tests. It's just code. You version the data as you version any other test data. Never used travis myself,

You store them in the same place where you place other tests. It's just code. You version the data as you version any other test data. Never used travis myself, I guess it's some kind of CI. Many people do this. It's perfectly normal. Of course if you don't even use Excel in the first place, I don't know why you're asking.