Hi,
does someone know why all the test tracks (drags, total airfield,…) are only available in setup test, and no on free play ?
So it’s impossible to drive on drag races or on the open test track with a second player in free play unlike FM4
I had the same question but I kind of found the answer on my own:
The only way to see the additional test track layouts or even the drag layouts for that matter is create a private lobby - you don’t have to invite people - set game mode to tag, and there you go. If you want all the drag layouts in the game, select ‘drag’.
Let me know how it works out! 
Yes, it should work this way, but I don’t play online. This is why I asked if it was possible…
But thank you for your answer
Mah’pleasure!