Any major disadvantage to buying a house with partner even though we aren’t married?

I’ve been with my fiancé for 9 years and we are getting married next year. We both have great credit (upper 700 fico scores) and no major debt except for credit cards. We are currently renting and our lease ends July. We aren’t getting married until November next year. We have the money for a deposit for a house but we’re wondering if us being unmarried would affect our application for a house. We were thinking about getting married but not really getting married just so that we can apply for the loan together. Thoughts? Thanks!