Three Unit tests pass when run separately, only one passes when run together

I have three tests, FunnyCarSteps.cs, CarLotMaxSteps.cs, and CarTypeSteps.cs. When run seperatley they all pass, but when run together only CarLotMaxSteps passes.

CarTypeSteps.cs fails at line 49 with a lambda method no source available error. FunnyCarSteps.cs fails at line 19 with an index out of range error.

I am new to unit testing and don't understand what is going on.

Any help is greatly appreciated.