Branch preview branch max storage issue

Yesterday I tried to use a branch for the first time with my supabase project. My app host slightly heavy files and I am a pro tier user to support that. But when the preview branch ran I got this error
Error status 400: {"statusCode":"413","error":"Payload too large","message":"The object exceeded the maximum allowed size"}

so the test failes even tho its not technicaly wrong, I'm guessing the preview branch behaves as a free user.
Is there a way to work around this?
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