diff --git a/types/event_bus_test.go b/types/event_bus_test.go
index be3f2315f..0c72a442e 100644
--- a/types/event_bus_test.go
+++ b/types/event_bus_test.go
@@ -139,7 +139,8 @@ func TestEventBusPublish(t *testing.T) {
 	require.NoError(t, err)
 	defer eventBus.Stop()
 
-	sub, err := eventBus.Subscribe(context.Background(), "test", tmquery.Empty{})
+	// FIXME: the test fails without a buffer
+	sub, err := eventBus.Subscribe(context.Background(), "test", tmquery.Empty{}, 14)
 	require.NoError(t, err)
 
 	const numEventsExpected = 14