You are trying to create a parameterized device, so you have a constructor that takes one argument. Unlike the comment above, this is true for both NUnit V2 and V3.
, NUnit , , , . ,
[TestFixture(someArgument)]
, - , stubIContext TestFixtureSetUp. :
, , NUnit v3. , , , , .
, , . SetUp, TestFixtureSetUp. , , -, . , , , TestFixtureSetUp .