diff --git a/miss_islington/tasks.py b/miss_islington/tasks.py
index 58a99f188..c79704325 100644
--- a/miss_islington/tasks.py
+++ b/miss_islington/tasks.py
@@ -16,7 +16,8 @@
 app = celery.Celery("backport_cpython")
 
 app.conf.update(
-    BROKER_URL=os.environ["REDIS_URL"], CELERY_RESULT_BACKEND=os.environ["REDIS_URL"]
+    BROKER_URL=os.environ["HEROKU_REDIS_MAROON_TLS_URL"],
+    CELERY_RESULT_BACKEND=os.environ["HEROKU_REDIS_MAROON_TLS_URL"],
 )
 
 cache = cachetools.LRUCache(maxsize=500)
diff --git a/tests/test_backport_pr.py b/tests/test_backport_pr.py
index 5588451e9..cf94de680 100644
--- a/tests/test_backport_pr.py
+++ b/tests/test_backport_pr.py
@@ -7,7 +7,7 @@
 import redis
 import kombu
 
-os.environ["REDIS_URL"] = "someurl"
+os.environ["HEROKU_REDIS_MAROON_TLS_URL"] = "someurl"
 
 from miss_islington import backport_pr