Needing to specify the 8000 port drove me bananas with an "it works in production but not in develop" issue. Try changing your host file for test.app to point to your VM's IP (Homestead's default is 192.168.10.10) instead of 127.0.0.1.
Now I navigate to http://project.app instead of http://project.app:8000. This resolved a handful of issues where my environment was out of whack with the rest of the team running Laravel on a different vagrant box.
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