swift - addUIInterruptionMonitor(withDescription:handler:) not working on iOS 10 or 9

Question

The following tests works fine on iOS 11. It dismisses the alert asking permissions to use the locations services and then zooms in in the map. On iOS 10 or 9, it does none of this and the test still succeeds

func testExample() {
    let app = XCUIApplication()

    var handled = false
    var appeared = false

    let token = addUIInterruptionMonitor(withDescription: "Location") { (alert) -> Bool in
        appeared = true
        let allow = alert.buttons["Allow"]
        if allow.exists {
            allow.tap()
            handled = true
            return true
        }

        return false
    }

    // Interruption won't happen without some kind of action.
    app.tap()

    removeUIInterruptionMonitor(token)
    XCTAssertTrue(appeared && handled)
}

Does anyone have an idea why and/or a workaround?

Here's a project where you can reproduce the issue: https://github.com/TitouanVanBelle/Map

Update

Xcode 9.3 Beta's Changelogs show the following

XCTest UI interruption monitors now work correctly on devices and simulators running iOS 10. (33278282)

Answer 1

let springboard = XCUIApplication(bundleIdentifier: "com.apple.springboard") 

let allowBtn = springboard.buttons["Allow"]
if allowBtn.waitForExistence(timeout: 10) {
    allowBtn.tap()
}

Update .exists to .waitForExistence(timeout: 10), detail please check comments.