一个解决方案app.config问题中的两个测试项目（Visual Studio 2008 Professional）

I have 2 projects each one with its own unit test project, and one app.config for each project+test project pair. The tests do not fail if I run only one each time. But if use "Run all tests in solution" all tests will use just one of the app.config's, and it will be the wrong one for all tests in one of these test projects.I have 2 projects each one with its own unit te