i am using rxswift to process service data, and i use the xctest to test it, in xcode15, the test function test success, but when i use xcode16, the test function always failed, anyone can help me? thaks a lot

// ViewModel
     private let models = BehaviorRelay<[String]>(value: [])
     lazy var modelsDriver: Driver<[String]> = {
         return models.asDriver().skip(1)
     }()
     func requestData() {
         Service.get { data in
             DispatchQueue.main.async {
                 models.accept(data.models)
             }
         }
     }
     
    // XCTest
    func testRequest() async {
        let expectation = expectation(description: "RequestTest")
        DispatchQueue.main.async {
            self.viewModel.modelsDriver.drive(onNext: { models in
                XCTAssertEqual(mdoels.count, 4)
                expectation.fulfill()
            }).disposed(by: self.disposeBag)
        }
        viewModel.requestData()
        await fulfillment(of: [expectation], timeout: 5.0)
    }

i tried use Task api like this,

Task {
   viewModel.requestData()
}

but still failed. if a set timeout to 2min, i got the same error, and my simulator was stuck.
if i just run a simple test like this

func testData() {
   XCTAssertTrue(2 > 1)
}

my simulator was stuck, but if a run a UITest, the simulator works well