diff --git a/listen_test.go b/listen_test.go
index 11d1908b..978e953a 100644
--- a/listen_test.go
+++ b/listen_test.go
@@ -166,12 +166,18 @@ func captureOutput(f func()) string {
 	go func() {
 		var buf bytes.Buffer
 		wg.Done()
-		io.Copy(&buf, reader)
+		_, err := io.Copy(&buf, reader)
+		if err != nil {
+			panic(err)
+		}
 		out <- buf.String()
 	}()
 	wg.Wait()
 	f()
-	writer.Close()
+	err = writer.Close()
+	if err != nil {
+		panic(err)
+	}
 	return <-out
 }
 
@@ -244,6 +250,6 @@ func Test_App_print_Route_with_group(t *testing.T) {
 	utils.AssertEqual(t, true, strings.Contains(printRoutesMessage, "/v1/test/fiber/*"))
 }
 
-func emptyHandler(c *Ctx) error {
+func emptyHandler(_ *Ctx) error {
 	return nil
 }