diff --git a/go/src/fullcycle/do-iperf/main.go b/go/src/fullcycle/do-iperf/main.go
index fee93ac..5b42100 100644
--- a/go/src/fullcycle/do-iperf/main.go
+++ b/go/src/fullcycle/do-iperf/main.go
@@ -8,6 +8,7 @@ import (
 	"log"
 	"os"
 	"os/exec"
+	"time"
 )
 
 func main() {
@@ -58,5 +59,7 @@ func test(code, host string, out io.Writer) {
 		}
 	}
 
+	time.Sleep(1)
+
 	fmt.Fprintf(out, "{\"%v\": {\"progress\": 100, \"result\": \"\"}}\n", code)
 }