How to reproduce:
1. Download project from the link to the cloud and open it
2. Open Test Runner (Windows -> General -> Test Runner)
3. Select "PlayMode" inside of Test Runner
4. Click "Run All"

Expected result: testing will be done in order by one thread
Actual result: after testing FullScenePerformanceTest(0) testing not only continuous to go in order but new thread at the beginning will start to test all over again

Notes:
- It is hard to notice with the stripped project, for more obvious example download user's attached project
- when the first thread reaches the end testing stops, no matter where the other threads were at that moment
- to disable infinite loop comment out CharacterweaponTests.cs files line 17 "[Repeat(10)]" it prevents testing thread reaching the end
- when new thread start you receive an error: NullReferenceException: Object reference not set to an instance of an object

Reproducible with: 2018.2.7f1, 2018.3.0b1
Could not reproduce with: 2018.1.9f2 (test runner didn't recognize scene array), 2017.4.9f2 (package manager error)