             _, error in
 
             if error == nil {
-                XCTFail("Expected error response")
+                XCTFail(missingErrorMessage)
             }
             expectation.fulfill()
         }

            response, error in

            if let error = error {
                XCTFail("Unexpected error response from service: \(error)")
                return
            }
            guard let csv = response?.result else {
                XCTFail("Missing response value")
                return
            }


            response, error in

            if let error = error {
                XCTFail(unexpectedErrorMessage(error))
                return
            }
            guard let profile = response?.result else {
                XCTFail(missingResultMessage)
                return
            }

