Python Flask Testing, cannot convert to JSON-object

I'm building an api with pyhton and flask and also i wanna test my stuff. I have a little problem with the response data of the get request. I don't know how to convert it to json-format.

The Code for the Tasklist:

    tasks = [
    {
        'id': 1,
        'title': u'Buy groceries',
        'description': u'Milk, Cheese, Pizza, Fruit, Tylenol',
        'done': False
    },
    {
        'id': 2,
        'title': u'Learn Python',
        'description': u'Need to find a good Python tutorial on the web',
        'done': False
    }
]

app = Flask(__name__, static_url_path="")

@app.route('/myapp/api/v1.0/tasks', methods=['GET'])
def get_tasks():
    return jsonify({'tasks': [task for task in tasks]})

if __name__ == '__main__':
    app.run(debug=True)

The Code for the Test-Case:

class MyTestCase(unittest.TestCase):

    def setUp(self):        
        myapp.app.config['TESTING'] = True
        self.app = myapp.app.test_client()        

    def test_empty_url(self):
        response = self.app.get('/myapp/api/v1.0/tasks')    

        resp = json.loads(response.data)           

        print(resp) 


if __name__ == '__main__':
    unittest.main()

Unfortunately I can't convert the response.data to a json object (output console):

TypeError: the JSON object must be str, not 'bytes'

Can anybody help me?

Thx a lot!