Django `manage.py test` ignores some tests

I have some django-based app. Inside this app I have tests.py file. Inside this file I have two test classes:

# -*- coding: utf-8 -*-

from django.test import TestCase, RequestFactory
from django.contrib.auth.models import User
from translations import utils, views_ajax
from translations.models import Project
import json


def print_results(sentences):
    for sent in sentences:
        print "u\"" + sent + "\","


class TextSplitTest(TestCase):
    maxDiff = None

    def test_en_split(self):
        # some actions
        sentences, marked_text, count_num = utils.split_text(text_to_split, 'en')
        self.assertEqual(sentences, good_result)

    def test_fr_split(self):
        # some actions
        sentences, marked_text, count_num = utils.split_text(text_to_split, 'ru')
        self.assertEqual(sentences, good_result)

    def test_zh_split(self):
        # some actions
        sentences, marked_text, count_num = utils.split_text(text_to_split, 'zh')
        self.assertEqual(sentences, good_result)

    def test_es_split(self):
        # some actions
        sentences, marked_text, count_num = utils.split_text(text_to_split, 'es')
        # print_results(sentences)
        self.assertEqual(sentences, good_result)


class CreateProjectTest(TestCase):
    def setUp(self):
        self.factory = RequestFactory()
        self.user = User.objects.create_user(username='jacob', email='jacob@gmail.com', password='top_secret')

    def create_project(self):
        request = self.factory.post('/api/project-create/',
                                    data=json.dumps({'name': 4321, 'description': "ololo", 'type': "public"}),
                                    content_type='application/json')
        request.user = self.user
        response = views_ajax.create_project_ajax(request)

        all_user_projects = Project.objects.filter(manager=self.user)

        self.assertEqual(len(all_user_projects), 1)
        self.assertEqual(response.status_code, 200)

    def add_text_to_project(self):
        project = Project.objects.get(manager=self.user, name='4321')
        data = json.dumps({"project":project.id,
                           "title":"French test",
                           "subject":1,
                           "sourceLang":7,
                           "targetLang":2,
                           "textBody":"Some text"})

        request = self.factory.post('/api/text/', data=data, content_type='application/json')
        request.user = self.user

        response = views_ajax.text_ajax(request)

        self.assertEqual(response.status_code, 200)

But when I'm trying to start tests, I'm getting:

# python manage.py test -v 2
...
test_basic_addition (entries.tests.SimpleTest) ... ok
test_en_split (translations.tests.TextSplitTest) ... ok
test_es_split (translations.tests.TextSplitTest) ... ok
test_fr_split (translations.tests.TextSplitTest) ... ok
test_ru_split (translations.tests.TextSplitTest) ... ok
test_zh_split (translations.tests.TextSplitTest) ... ok

----------------------------------------------------------------------
Ran 6 tests in 0.224s

OK

And when I'm trying to start exact test class:

# python manage.py test translations.tests.CreateProjectTest -v 2
...
----------------------------------------------------------------------
Ran 0 tests in 0.000s

OK

Why django ignores some tests? I've tried to google it out, but get nothing:(