Visual Studio doesn't allow the usage of special characters like ampersand("&") in the name of the test, but you can use them in the Test Studio Standalone version. If you export that test to Visual Studio however and try to execute it, VS will throw the following exception:   

System.IO.FileNotFoundException: Unable to find the code behind assembly. Please make sure you have compiled your code behind without errors before attempting to execute the test. Looking for: C:\Users\Taritas\Documents\Test Studio Projects\demo\TestResults\demo.dll
 If you are running VS 2010, make sure Deployment is checked in your .settings file (in the solution items)
    at ArtOfTest.WebAii.Design.Execution.ExecutionUtils.EnsureAssemblyExists(String assembly, String folder)
    at ArtOfTest.WebAii.Design.Execution.ExecutionUtils.EnsureAssemblyExists(Test testcase, String folder)
    at ArtOfTest.WebAii.Design.Execution.ExecutionUtils.CreateCodedTestInstance(Test test, TestResult result, String binariesFolder)
    at ArtOfTest.WebAii.Design.Execution.ExecutionEngine.InternalExecuteTest(Test test, TestResult initializationResult)
    at ArtOfTest.WebAii.Design.Execution.TestExecuteProxy.ExecuteTest(ExecuteTestCommand command)