It’s all sorted alphabetically (classes and methods). So when You need some tests running last, just change the name of Class or Method (for (nasty) example by prefixing ‘z_’).
So…You have Class names:
MyAppTest1
-testMethodA
-testMethodB
MyAppTest2
-testMethodC
-testMethodD
and they run in this order. If you need to run MyAppTest1 as second, just rename so it’s name is alphabetically after MyAppTest2 (z_MyAppTest1) and it will run (same for method):
MyAppTest2
-a_testMethodD
-testMethodC
z_MyAppTest1
-testMethodA
-testMethodB
Also please take the naming as example 🙂