VS 2005 Test Project Not Opening

I'm trying to open a VS 2005 solution which includes a VS2005 Test project. When the s开发者_StackOverflow社区olution is opened, all projects apart from the Test project are loaded. When I try to load the Test project, I get the following error:

The project type is not supported by this installation

My VS instance: Visual Studio 2005 Professional Version 8.0.50727.762 (SP .050727-7600)

Thanks a lot in advance

VS 2005 Professional did not support Test projects (VS 2008 Pro does support Test projects). For VS 2005 with unit testing, you would have needed Test Edition or Team Suite.