diff --git a/tests/test_downloadermiddleware_httpcache.py b/tests/test_downloadermiddleware_httpcache.py
index 12b69860a..22946b98c 100644
--- a/tests/test_downloadermiddleware_httpcache.py
+++ b/tests/test_downloadermiddleware_httpcache.py
@@ -322,6 +322,7 @@ class RFC2616PolicyTest(DefaultStorageTest):
             (True, 203, {'Last-Modified': self.yesterday}),
             (True, 300, {'Last-Modified': self.yesterday}),
             (True, 301, {'Last-Modified': self.yesterday}),
+            (True, 308, {'Last-Modified': self.yesterday}),
             (True, 401, {'Last-Modified': self.yesterday}),
             (True, 404, {'Cache-Control': 'public, max-age=600'}),
             (True, 302, {'Expires': self.tomorrow}),