Run IntelliJ JUnit Tests in Serial

I'm using the JUnit runner in I开发者_如何学GontelliJ to run all tests in a package. When I run my tests in isolation they pass, when I run the entire package some fail, suggesting interplay between the tests. I'd like to force the tests to be run in serial rather than parallel to prove this - can anyone tell me how I can configure this to happen?

Thanks

Tests don't run in parallel, at least not in IDEA 9.x. Unless you are using IDEA 10 EAP, your problem is different and you need to provide more details to get a good answer.