Fixed test runner for Django 1.4

setup.py

@@ -32,6 +32,5 @@ setup(
         'Programming Language :: Python',
         'Framework :: Django',
     ],
-    test_suite='taggit.tests.runtests.runtests'
+    test_suite='taggit.tests.runtests.runtests',
 )
-

taggit/tests/runtests.py

@@ -6,7 +6,11 @@ from django.conf import settings
 
 if not settings.configured:
     settings.configure(
-        DATABASE_ENGINE='sqlite3',
+        DATABASES={
+            'default': {
+                'ENGINE': 'django.db.backends.sqlite3',
+            }
+        },
         INSTALLED_APPS=[
             'django.contrib.contenttypes',
             'taggit',
@@ -14,21 +18,13 @@ if not settings.configured:
         ]
     )
 
-from django.test.simple import run_tests
 
+from django.test.simple import DjangoTestSuiteRunner
 
-def runtests(*test_args):
-    if not test_args:
-        test_args = ['tests']
-    parent = os.path.join(
-        os.path.dirname(os.path.abspath(__file__)),
-        "..",
-        "..",
-    )
-    sys.path.insert(0, parent)
-    failures = run_tests(test_args, verbosity=1, interactive=True)
+def runtests():
+    runner = DjangoTestSuiteRunner()
+    failures = runner.run_tests(['tests'], verbosity=1, interactive=True)
     sys.exit(failures)
 
-
 if __name__ == '__main__':
-    runtests(*sys.argv[1:])
+    runtests()