Does NUnit create a new instance of the test fixture class for each contained test method nowadays?

The fixture is created once for all of the tests in that fixture.

For a given fixture class, a FixtureSetup method is run once for all of the tests in a fixture, and a Setup method is run once for each test. So, any state that needs to be reset should be done in a Setup method (or TearDown, which is run at the end of each test.)

I found that this was an issue that affected me and also found this link which provides a bit of history to the issue; https://blogs.msdn.microsoft.com/jamesnewkirk/2004/12/04/why-variables-in-nunit-testfixture-classes-should-be-static

I think one of the biggest screw-ups that was made when we wrote NUnit V2.0 was to not create a new instance of the test fixture class for each contained test method.

Not yet tested this in V3 to see if its changed