diff --git a/csp/tests/test_contrib.py b/csp/tests/test_contrib.py
index 98ccded..2140505 100644
--- a/csp/tests/test_contrib.py
+++ b/csp/tests/test_contrib.py
@@ -2,12 +2,14 @@
 from django.test import RequestFactory
 from django.test.utils import override_settings
 
+from csp.contrib.formatted_policy import FormattedPolicyCSPMiddleware
 from csp.contrib.rate_limiting import RateLimitedCSPMiddleware
 from csp.tests.utils import response
 
 
 HEADER = 'Content-Security-Policy'
-mw = RateLimitedCSPMiddleware(response())
+rate_limited_mw = RateLimitedCSPMiddleware(response())
+formatted_mw = FormattedPolicyCSPMiddleware(response())
 rf = RequestFactory()
 
 
@@ -17,8 +19,16 @@ def test_report_percentage():
     for _ in range(5000):
         request = rf.get('/')
         response = HttpResponse()
-        mw.process_response(request, response)
+        rate_limited_mw.process_response(request, response)
         if 'report-uri' in response[HEADER]:
             times_seen += 1
     # Roughly 10%
     assert 400 <= times_seen <= 600
+
+
+@override_legacy_settings(CSP_DEFAULT_SRC=["{host}"])
+def test_formatted_policy():
+    request = rf.get('/', HTTP_HOST='example.com')
+    response = HttpResponse()
+    formatted_mw.process_response(request, response)
+    assert response[HEADER] == 'default-src example.com'