Question: I created the first unit test target in our `iOS` application by simply clicking through the plus icon inside the test tab on the left navigator.
(The target to be tested is set to the main application)

![Creating a new unit test target](https://i.stack.imgur.com/vRJ82.png)

The unit test target created itself successfully but when I try to run the pre-generated tests, it outputs an error message. The error message displays that the build input file cannot be found. More specifically, the file `/Plugins/XXXTests.xctest/XXXTests` cannot be found. I double checked and in fact that file is not in that directory. 

![Error message when trying to run tests](https://i.stack.imgur.com/dL9o6.png)

While I could not find anything similar to this problem, I tried everything that was close to it but nothing seemed to fix problem. 

Any help would be greatly appreciated!

Answer: 
It's been a while but we finally found a solution! The problem was in the Podfile where our pods weren't being applied to the different targets of our app. To fix the solution we had to define a shared pod module that included all of our pods and then we applied this new module to each different targets in our app. 

Our Podfile looks like this now[![Shared pod example for multiple targets](https://i.stack.imgur.com/T27Q3.png)](https://i.stack.imgur.com/T27Q3.png)

I hope this helps out some people!
For me, it was because the test source files are not included in the test target. 

Including those test files in the test target solved it.