diff --git a/infrastructure/environments/dplplat01/sites.yaml b/infrastructure/environments/dplplat01/sites.yaml
index dbd226a0..87396195 100644
--- a/infrastructure/environments/dplplat01/sites.yaml
+++ b/infrastructure/environments/dplplat01/sites.yaml
@@ -8,6 +8,13 @@ x-webmaster: &webmaster-release-image-source
   releaseImageName: dpl-cms-source
   dpl-cms-release: "2024.35.1"
   moduletest-dpl-cms-release: "2024.37.0"
+# Some sites on the webmaster plan wish to track the same release as
+# sites do per default in dpl-cms-release.
+x-webmaster-with-defaults: &webmaster-with-defaults-release-image-source
+  # Reference default before webmaster anchor as YAML references will not
+  # override existing keys.
+  <<: *default-release-image-source
+  <<: *webmaster-release-image-source
 sites:
   # Site objects are indexed by a unique key that must be a valid lagoon, and
   # github project name. That is, alphanumeric and dashes.
@@ -26,14 +33,14 @@ sites:
     description: "A site to test new releases on"
     deploy_key: ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIBLUrrxfwsfwz4nkn/WCbMUbLHkTFvyYB2uusHLA7NlH
     plan: webmaster
-    <<: *webmaster-release-image-source
+    <<: *webmaster-with-defaults-release-image-source
   cms-school:
     name: "CMS-skole"
     description: "Et site til undervisning i CMSet"
     importTranslationsCron: "0 * * * *"
     deploy_key: "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJ6SzfPFf/XeLeqI342kxuJAlATpDMtgAfqlrLTTbW2m"
     plan: webmaster
-    <<: *webmaster-release-image-source
+    <<: *webmaster-with-defaults-release-image-source
   bibliotek-test:
     name: "Bibliotekstest"
     description: "Et site hvor bibliotekerne kan teste"
@@ -695,7 +702,7 @@ sites:
       - www.silkeborgbib.dk
     autogenerateRoutes: true
     plan: webmaster
-    <<: *webmaster-release-image-source
+    <<: *webmaster-with-defaults-release-image-source
   skanderborg:
     name: "Skanderborg Bibliotek"
     description: "The library site for Skanderborg"