React/Redux code to login a user with axios - Issue with zombie.js testing

axios.js

// Login the user
export const getUserLogin = (email, password) => {
  let
    url            = `${GT_API_URL}/login`
  ;

  console.log('getUserLogin');  // This text appears on the log

  return function (dispatch) {
    dispatch(userLoginRequest());

    return axios({
      url          : url,
      timeout      : 20000,
      method       : 'post',
      responseType : 'json',
      data : {
        email : email,
        password : password
      }
    })
    .then(
      response => {
        console.log('success for user login response');  // This log does not appear
        dispatch(userLoginSuccess(response));  //  Store it in the state
      },
      error    => {
        console.log('fail to login user');  // Neither does this one
        dispatch(userLoginFailure());
        // Track the error
        piwik.trackError( { message: error, filename: 'userAction', lineno: 229 }, 'User Login Error');
      }
    )
    ;
  };

};