Removing test target completely from Xcode project

I tried to remove test target from Xcode project so I followed suggestions from this Stackoverflow post.

Then I deleted AppnameTests folder with files in it (AppnameTest.m and info.plist) by right-clicking and choosing move to trash. Also tried Xcode->Edit->Delete for deletion.

After that, I tried to clean project, but one weird thing is happening. Folder AppnameTests is not removed after deleting that folder trough Xcode (files inside it are gone). It can be removed only manually using Finder, but I don't think this is a good idea, because maybe Xcode keeps reference to this folder.

I am using Xcode 6.1. Anybody experienced this? Why is this happening?