diff --git a/scripts/ci/make_mnt_writeable.sh b/scripts/ci/make_mnt_writeable.sh
index ddabf84b6b79d..717a9db06ae8f 100755
--- a/scripts/ci/make_mnt_writeable.sh
+++ b/scripts/ci/make_mnt_writeable.sh
@@ -20,6 +20,11 @@ function make_mnt_writeable {
     echo "Investigating node disks"
     lsblk
     sudo blkid
+    echo "Check that we have expected /mnt to be a separate mount"
+    if ! lsblk | grep -q /mnt; then
+        echo "/mnt is missing as a separate mount, runner misconfigured!"
+        exit 42
+    fi
     echo "Checking free space!"
     df -H
     echo "Cleaning /mnt just in case it is not empty"