@MainActor on XCTestCase warns with strict concurrency checking

[humblehacker]

I've turned on strict concurrency checking. Currently using the Xcode 15.3 beta. I have a test case that I defined following the documentation. With strict concurrency checking I get the following warning:

Main actor-isolated class 'ContentReducerTests' has different actor isolation from nonisolated superclass 'XCTestCase'; this is an error in Swift 6

Should I ignore this?

I noticed that if I move the @MainActor attribute to the test functions instead of the whole class, the warning goes away. But I'm uncertain if this is correct.

[stephencelis]

@humblehacker You can move the @MainActor annotations to individual test cases instead to work around this warning, but it may be worth bringing up on the Swift forums or in a feedback!