diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 7e5883caf97f8dbcc47c927fc745d5b810f3c5fa..246f0152e11689a62d98c6616148eb6151388949 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,4 +1,7 @@
 variables:
+  ### Disable cache in Docker builds, as this has occasionally resulted in images not containing what was
+  ### expected multiple MRs where being built/retried.
+  NO_CACHE: 'true'
   OPENSHIFT_SERVER: https://api.paas.okd.cern.ch
   NAMESPACE: notifications-main
   RESOURCE: web-portal