diff --git a/cachalot/tests.py b/cachalot/tests.py
index 4253cad..e9672be 100644
--- a/cachalot/tests.py
+++ b/cachalot/tests.py
@@ -2,9 +2,9 @@
 
 from __future__ import unicode_literals
 try:
-    from unittest import skip
+    from unittest import skip, skipIf
 except ImportError:  # For Python 2.6
-    from unittest2 import skip
+    from unittest2 import skip, skipIf
 import datetime
 from django.conf import settings
 from django.contrib.auth.models import User, Permission, Group
@@ -1178,3 +1178,22 @@ class AtomicTestCase(TestCase):
                     pass
         data3 = list(Test.objects.all())
         self.assertListEqual(data3, [t1])
+
+
+class SettingsTestCase(TestCase):
+    @skipIf(len(settings.CACHES) == 1,
+            'We can’t change the cache used since there’s only one configured')
+    def test_cache(self):
+        with self.settings(CACHALOT_CACHE='default'):
+            with self.assertNumQueries(1):
+                list(Test.objects.all())
+            with self.assertNumQueries(0):
+                list(Test.objects.all())
+
+        other_cache = [k for k in settings.CACHES if k != 'default'][0]
+
+        with self.settings(CACHALOT_CACHE=other_cache):
+            with self.assertNumQueries(1):
+                list(Test.objects.all())
+            with self.assertNumQueries(0):
+                list(Test.objects.all())
diff --git a/runtests.py b/runtests.py
index b9e7bef..3ed6b8f 100755
--- a/runtests.py
+++ b/runtests.py
@@ -37,6 +37,9 @@ CACHES = {
         'LOCATION': '127.0.0.1:6379:0',
     }
 }
+DEFAULT_CACHE_KEY = os.environ.get('CACHE_BACKEND', 'locmem')
+CACHES['default'] = CACHES[DEFAULT_CACHE_KEY]
+del CACHES[DEFAULT_CACHE_KEY]
 
 settings.configure(
     DEBUG=True,
@@ -46,7 +49,7 @@ settings.configure(
         'django.contrib.auth',
         'django.contrib.contenttypes',
     ),
-    CACHES={'default': CACHES[os.environ.get('CACHE_BACKEND', 'locmem')]},
+    CACHES=CACHES,
     MIDDLEWARE_CLASSES=(),
 )