diff --git a/common/signal/exec_test.go b/common/signal/exec_test.go
index d6bac83b5..78116e32f 100644
--- a/common/signal/exec_test.go
+++ b/common/signal/exec_test.go
@@ -4,85 +4,40 @@ import (
 	"context"
 	"errors"
 	"testing"
+	"time"
 
 	. "v2ray.com/core/common/signal"
 	. "v2ray.com/ext/assert"
 )
 
-func TestErrorOrFinish2_Error(t *testing.T) {
+func TestExecuteParallel(t *testing.T) {
 	assert := With(t)
 
-	c1 := make(chan error, 1)
-	c2 := make(chan error, 2)
-	c := make(chan error, 1)
+	err := ExecuteParallel(context.Background(), func() error {
+		time.Sleep(time.Millisecond * 200)
+		return errors.New("test")
+	}, func() error {
+		time.Sleep(time.Millisecond * 500)
+		return errors.New("test2")
+	})
 
-	go func() {
-		c <- ErrorOrFinish2(context.Background(), c1, c2)
-	}()
-
-	c1 <- errors.New("test")
-	err := <-c
 	assert(err.Error(), Equals, "test")
 }
 
-func TestErrorOrFinish2_Error2(t *testing.T) {
+func TestExecuteParallelContextCancel(t *testing.T) {
 	assert := With(t)
 
-	c1 := make(chan error, 1)
-	c2 := make(chan error, 2)
-	c := make(chan error, 1)
+	ctx, cancel := context.WithCancel(context.Background())
+	err := ExecuteParallel(ctx, func() error {
+		time.Sleep(time.Millisecond * 2000)
+		return errors.New("test")
+	}, func() error {
+		time.Sleep(time.Millisecond * 5000)
+		return errors.New("test2")
+	}, func() error {
+		cancel()
+		return nil
+	})
 
-	go func() {
-		c <- ErrorOrFinish2(context.Background(), c1, c2)
-	}()
-
-	c2 <- errors.New("test")
-	err := <-c
-	assert(err.Error(), Equals, "test")
-}
-
-func TestErrorOrFinish2_NoneError(t *testing.T) {
-	assert := With(t)
-
-	c1 := make(chan error, 1)
-	c2 := make(chan error, 2)
-	c := make(chan error, 1)
-
-	go func() {
-		c <- ErrorOrFinish2(context.Background(), c1, c2)
-	}()
-
-	close(c1)
-	select {
-	case <-c:
-		t.Fail()
-	default:
-	}
-
-	close(c2)
-	err := <-c
-	assert(err, IsNil)
-}
-
-func TestErrorOrFinish2_NoneError2(t *testing.T) {
-	assert := With(t)
-
-	c1 := make(chan error, 1)
-	c2 := make(chan error, 2)
-	c := make(chan error, 1)
-
-	go func() {
-		c <- ErrorOrFinish2(context.Background(), c1, c2)
-	}()
-
-	close(c2)
-	select {
-	case <-c:
-		t.Fail()
-	default:
-	}
-
-	close(c1)
-	err := <-c
-	assert(err, IsNil)
+	assert(err.Error(), HasSubstring, "canceled")
 }