diff --git a/metropolis/test/e2e/suites/ha_cold/run_test.go b/metropolis/test/e2e/suites/ha_cold/run_test.go
index 6a5c6e8..43ff689 100644
--- a/metropolis/test/e2e/suites/ha_cold/run_test.go
+++ b/metropolis/test/e2e/suites/ha_cold/run_test.go
@@ -42,6 +42,7 @@
 		NumNodes:        3,
 		NodeLogsToFiles: true,
 		InitialClusterConfiguration: &cpb.ClusterConfiguration{
+			ClusterDomain:         "cluster.test",
 			TpmMode:               cpb.ClusterConfiguration_TPM_MODE_DISABLED,
 			StorageSecurityPolicy: cpb.ClusterConfiguration_STORAGE_SECURITY_POLICY_NEEDS_INSECURE,
 		},