Forcing MSTest to use a single thread

Question

Given this test fixture:

[TestClass]
public class MSTestThreads
{
    [TestMethod]
    public void Test1()
    {
              


        

Answer 1

We try hard to make out tests isolated from each other. Many of them achieve this by setting up the state of a database, then restoring it afterwards. Although mostly tests set up different data, with some 10,000 in a run there is a fair chance of a collision unless the code author of a test takes care to ensure its initial data is unique (ie doesn't use the same primary keys as another test doing something similar). This is, frankly, unmanageable, and we do get occasional test failures that pass second time around. I am fairly sure this is caused by collisions that would be avoided running tests strictly sequentially.