Take a look at how we configure the specs for the syntax enabling disabling, we've already solved this problem to our satisfaction.

> Move this two contexts into another spec file and require there different spec_helper, so inside this suite both syntax will be available by default

Won't work if in the same process as our current test suite (which it would be by default).

> ... snip...
> That might work. But is that a good approach to problem ?

As above, it would just conflict between specs and isn't a good approach to the problem, we shouldn't rely on the outer RSpec environment in our tests.