Non-sendable type DispatchTimeInterval exiting main actor-isolated context warning when using toEventually

Question

I'm using Nimble to create tests. When I try to test a class that is annotated as a main actor. The toEventually method shows me the following warning:

Non-sendable type 'DispatchTimeInterval' exiting main actor-isolated context in call to non-isolated instance method 'toEventually(_:timeout:pollInterval:description:)' cannot cross actor boundary

I need to keep the main actor annotation on the test case. Here is an example:

import XCTest
import Nimble

@testable import ConcurrencyTest

@MainActor
class Test {

  func testing(completion: @escaping () -> Void) {
    Task {
      sleep(1)
      completion()
    }
  }
}

@MainActor
final class ConcurrencyTestTests: XCTestCase {

    func testExample() async throws {
      let test = Test()
      var completionCalled = false
      test.testing(completion: { completionCalled = true })
      await expect(completionCalled).toEventually(beTrue()) // <-- warning
    }

}

It is possible to remove the warning with extension DispatchTimeInterval: @unchecked Sendable {} but seems hacky.

Can someone tell me if there is another method to remove the warning?

Thanks!