diff --git a/platforms/firmata/client/client_test.go b/platforms/firmata/client/client_test.go
index 689ca5e2..d5b1d9f4 100644
--- a/platforms/firmata/client/client_test.go
+++ b/platforms/firmata/client/client_test.go
@@ -285,6 +285,7 @@ func TestProcessStringData(t *testing.T) {
 		sem <- true
 	})
 
+	time.Sleep(10 * time.Millisecond)
 	go b.process()
 
 	select {