diff --git a/.github/workflows/observability-charm-tests.yaml b/.github/workflows/observability-charm-tests.yaml
index 5199421ce..7a66f6b6f 100644
--- a/.github/workflows/observability-charm-tests.yaml
+++ b/.github/workflows/observability-charm-tests.yaml
@@ -10,8 +10,7 @@ jobs:
       fail-fast: false
       matrix:
         charm-repo:
-# TODO(benhoyt): reinstate after https://github.com/canonical/alertmanager-k8s-operator-1/pull/1 is merged
-#          - "canonical/alertmanager-k8s-operator"
+          - "canonical/alertmanager-k8s-operator"
           - "canonical/prometheus-k8s-operator"
           - "canonical/grafana-k8s-operator"