I am facing similar issue, This happens when my XCUItest script uninstalls and reinstalls test application amid a single run. 2021-03-12 19:19:57.675873+0530 UITests-Runner[10864:1037908] * Assertion failure in -[XCTFuture _waitForFulfillment], XCTFuture.m:158 2021-03-12 19:19:58.359629+0530 UITests-Runner[10864:1037908] * Assertion failure in -[XCTActivityRecordStack didFinishActivity:testCase:], XCTActivityRecordStack.m:64 To me looks like Xcode issue (probably introduced since Xcode 12 and above). I am using Xcode 12.3.

Any update/fix for this issue? I find this issue whenever my script tries to uninstall and install the test app within same test run.