diff --git a/csp_advanced/tests.py b/csp_advanced/tests.py
index 7c02db3..810eb0c 100644
--- a/csp_advanced/tests.py
+++ b/csp_advanced/tests.py
@@ -164,6 +164,11 @@ class TestMiddleware(SimpleTestCase):
     def test_no_csp(self):
         self.assertRaises(MiddlewareNotUsed, self.decorator_factory)
 
+    @override_settings(ADVANCED_CSP={'script-src': ['self']})
+    def test_new_style(self):
+        middleware = AdvancedCSPMiddleware(lambda request: HttpResponse('ok'))
+        self.assertEqual(middleware(self.get_request())['Content-Security-Policy'], "script-src 'self'")
+
     @override_settings(ADVANCED_CSP={'script-src': ['self']})
     def test_setting_csp(self):
         self.assertEqual(self.make_ok_view()(self.get_request())['Content-Security-Policy'], "script-src 'self'")