diff --git a/django/core/cache/backends/dummy.py b/django/core/cache/backends/dummy.py
index d1aea0a325..7957df8072 100644
--- a/django/core/cache/backends/dummy.py
+++ b/django/core/cache/backends/dummy.py
@@ -34,7 +34,7 @@ class DummyCache(BaseCache):
         return False
 
     def set_many(self, data, timeout=DEFAULT_TIMEOUT, version=None):
-        pass
+        return []
 
     def delete_many(self, keys, version=None):
         pass
diff --git a/tests/cache/tests.py b/tests/cache/tests.py
index 9a903ef203..5cee2d84a5 100644
--- a/tests/cache/tests.py
+++ b/tests/cache/tests.py
@@ -173,8 +173,8 @@ class DummyCacheTests(SimpleTestCase):
 
     def test_set_many(self):
         "set_many does nothing for the dummy cache backend"
-        cache.set_many({'a': 1, 'b': 2})
-        cache.set_many({'a': 1, 'b': 2}, timeout=2, version='1')
+        self.assertEqual(cache.set_many({'a': 1, 'b': 2}), [])
+        self.assertEqual(cache.set_many({'a': 1, 'b': 2}, timeout=2, version='1'), [])
 
     def test_delete_many(self):
         "delete_many does nothing for the dummy cache backend"