Underlying Provider Failed on Open - Visual Studio 2013

Attempt to load assembly with unsupported test framework in
E:\Etak\Source Code\3party_master_a\com.poipo.hisoka.api.payment.paypal.implementation.IntTests\bin\Debug\com.poipo.hisoka.api.payment.paypal.implementation.IntTests.dll
The underlying provider failed on Open.



Cara ngesolvenya cuma delete .pdb file didalam folder debug seperti yang ditunjukkan directory di atas... :D