I'm no expert when it comes to this but all I can boil it down to is the individual and how their body reacts.Tren for example, not everyone gets all the sides that come with it but some get all of it at a small dosage.
Like anything, too much of any compound will muck with you one way or another. Long durations and high dosages of test can probably cause sleeping issues. Generally, problems like these start to pop up at doses of 500-600mg per week or more, especially if you're running these high doses for an extended period. Everyone reacts differently, though some guys can handle 750mg or more with no major sleep issues, while others might start having problems at lower doses like 400mg.
For me, whenever I ran high Test cycles, I'd sometimes have trouble winding down at night, just felt too wired. It can happen.