Intención en proceso resuelta a proceso diferente

There are two activities in my app A and B, Activity A is the mainactivity. In androidmanifest.xml file, activity B describes with android:process property, like android:process=":C".

In my unit testing project, I want to test activity B, I use startActivitySync method to start activity B, but i got a java.lang.runtimexception:Intent in process A resolved to different process A:C.

I do not know how to solve it, somebody help me?