diff --git a/tools/internal_ci/linux/psm-csm.sh b/tools/internal_ci/linux/psm-csm.sh
index 68079bb1928..bc8b6a19bdc 100755
--- a/tools/internal_ci/linux/psm-csm.sh
+++ b/tools/internal_ci/linux/psm-csm.sh
@@ -161,6 +161,7 @@ main() {
   test_suites=(
     "gamma.gamma_baseline_test"
     "gamma.affinity_test"
+    "gamma.csm_observability_test"
     "app_net_ssa_test"
   )
   for test in "${test_suites[@]}"; do