diff --git a/cloud/bmaas/server/agent_callback_service_test.go b/cloud/bmaas/server/agent_callback_service_test.go
index 3bd3df9..4a3a9f4 100644
--- a/cloud/bmaas/server/agent_callback_service_test.go
+++ b/cloud/bmaas/server/agent_callback_service_test.go
@@ -58,7 +58,7 @@
 	}
 
 	heartbeat := func(mid uuid.UUID) error {
-		creds, err := rpc.NewEphemeralCredentials(priv, nil)
+		creds, err := rpc.NewEphemeralCredentials(priv, rpc.WantInsecure())
 		if err != nil {
 			t.Fatalf("could not generate ephemeral credentials: %v", err)
 		}
@@ -136,7 +136,7 @@
 	}
 
 	heartbeat := func(mid uuid.UUID, report *apb.OSInstallationReport) (*apb.AgentHeartbeatResponse, error) {
-		creds, err := rpc.NewEphemeralCredentials(priv, nil)
+		creds, err := rpc.NewEphemeralCredentials(priv, rpc.WantInsecure())
 		if err != nil {
 			t.Fatalf("could not generate ephemeral credentials: %v", err)
 		}