         super.tearDown()
     }
     
-    func expectError(error: JSONParseError, json: String, file: StaticString = __FILE__, line: UInt = __LINE__) {
+    func expectError(error: JSONParseError, json: String, file: String = __FILE__, line: UInt = __LINE__) {
         do {
             try JSONParser.parse(json.unicodeScalars)
             XCTFail("Expected error, got success", file: file, line: line)

        }
    }
    
    func expectValue(value: JSON, json: String, file: StaticString = __FILE__, line: UInt = __LINE__) {
        do {
            let parsedValue = try JSONParser.parse(json.unicodeScalars)
            XCTAssertEqual(value, parsedValue, file: file, line: line)

        }
    }
    
    func expectString(string: String, json: JSON, file: String = __FILE__, line: UInt = __LINE__) {
        do {
            let serialized = try json.jsonString()
            XCTAssertEqual(string, serialized, file: file, line: line)
