diff --git a/test/data/manifests/fedora-coreos-container.json b/test/data/manifests/fedora-coreos-container.json
index f1476c21..362e1fdd 100644
--- a/test/data/manifests/fedora-coreos-container.json
+++ b/test/data/manifests/fedora-coreos-container.json
@@ -465,7 +465,7 @@
             "repo": "/ostree/repo",
             "config": {
               "sysroot": {
-                "readonly": false,
+                "readonly": true,
                 "bootloader": "none",
                 "bls-append-except-default": "grub_users=\"\""
               }
diff --git a/test/data/manifests/fedora-coreos-container.mpp.yaml b/test/data/manifests/fedora-coreos-container.mpp.yaml
index b7f2d996..1deda8d4 100644
--- a/test/data/manifests/fedora-coreos-container.mpp.yaml
+++ b/test/data/manifests/fedora-coreos-container.mpp.yaml
@@ -79,7 +79,7 @@ pipelines:
           repo: /ostree/repo
           config:
             sysroot:
-              readonly: false
+              readonly: true
               bootloader: none
               bls-append-except-default: grub_users=""
       - type: org.osbuild.mkdir