Spurious failure: Nested async expectations are not allowed to avoid creating flaky tests

[xinsight]

• I have read CONTRIBUTING and have done my best to follow them.

What did you do?

I ran a test that has passed many times in the past, but is now failing.

class ExportDataActionSpec: QuickSpec {
    override func spec() {
        describe("ExportDataAction") {
            it("should do something") {
                let viewController = UIViewControllerMock()
                let session = MockNetworkSession.session
                let action = ExportDataAction(viewController: viewController, session: session)
                action.execute()
                expect(viewController.viewControllerFromPresentCall).toEventually(beAKindOf(UIActivityViewController.self), timeout: .seconds(3))
            }
        }
    }
}

What did you expect to happen?

I expect the test to pass.

The test always passes locally, but only seems to fail when running in CI. (github action)

What actually happened instead?

The test failed with:

Nested async expectations are not allowed to avoid creating flaky tests.

I don't understand this message as there are no nested async expectations. What am I missing?

Environment

List the software versions you're using:

• Quick: 4.0.0
• Nimble: 9.2.1 (also tried 11.2.1 and got the same error)
• Xcode Version: 14.0 (14A309)
• Swift Version: Xcode Default

Please also mention which package manager you used and its version. Delete the
other package managers in this list:

• Swift Package Manager 5.7.0