     override func tearDown() {
         // This method is called after the invocation of each test method in the class.
         AudioKit.disconnectAllInputs()
-        AudioKit.stop()
+        try! AudioKit.stop()
         super.tearDown()
     }
 


    func auditionTest() {
        if let existingOutput = output {
            AudioKit.auditionTest(node: existingOutput, duration: duration)
        }
    }

    func AKTestMD5(_ md5: String, alternate: String = "") {
        if let existingOutput = output {
            AudioKit.test(node: existingOutput, duration: duration, afterStart: afterStart)
        }
        let  localMD5 = MD5
        XCTAssertTrue([md5, alternate].contains(localMD5) && localMD5 != sineOscillatorMD5 && localMD5 != "", localMD5)


    func AKTestMD5Not(_ md5: String) {
        if let existingOutput = output {
            try! AudioKit.test(node: existingOutput, duration: duration, afterStart: afterStart)
        }
        let  localMD5 = MD5
        XCTAssertFalse(md5 == localMD5, localMD5)
