I was a bit frustrated when i upgraded to Xcode 4.3 and we started getting a SenTestCase symbol not found compiler error.

A very useful comment by “Daniel” gave me the solution:

The key is the Build Setting “Framework Search Paths”. It needs to contain the following values, in this order:

$(SDKROOT)/Developer/Library/Frameworks
$(DEVELOPER_LIBRARY_DIR)/Frameworks

Thanks Daniel!