Thank you for your question.
Each WPF Test
can be configured against a single WPF application. WPF tests are not able to recognize two different applications at the same time and change the active one during execution.
In general, functional tests cannot be run simultaneously on a single machine. Test Studio allows you to distribute test list execution among different execution machines.
If you would need further assistance please, provide us more details on the case.
However, if you have any other questions or if there is anything unclear do not hesitate to contact us again.