diff --git a/plans/tier1.fmf b/plans/tier1.fmf
index bf3e1db..54220c7 100644
--- a/plans/tier1.fmf
+++ b/plans/tier1.fmf
@@ -9,6 +9,7 @@
   prepare:
     - how: shell
       script: |
+        set -euxo pipefail
         ENABLE_REPO_CMD="yum-config-manager --enable"
         if command -v dnf >/dev/null 2>&1; then
           ENABLE_REPO_CMD="dnf config-manager --set-enabled"