diff --git a/internal/autocert/provider.go b/internal/autocert/provider.go
index b526cc4..c598732 100644
--- a/internal/autocert/provider.go
+++ b/internal/autocert/provider.go
@@ -43,6 +43,12 @@ type (
 
 var ErrGetCertFailure = errors.New("get certificate failed")
 
+func TestProvider(cert *tls.Certificate) *Provider {
+	return &Provider{
+		tlsCert: cert,
+	}
+}
+
 func (p *Provider) GetCert(_ *tls.ClientHelloInfo) (*tls.Certificate, error) {
 	if p.tlsCert == nil {
 		return nil, ErrGetCertFailure
@@ -173,7 +179,7 @@ func (p *Provider) ScheduleRenewal(parent task.Parent) {
 		timer := time.NewTimer(time.Until(renewalTime))
 		defer timer.Stop()
 
-		task := parent.Subtask("cert-renew-scheduler")
+		task := parent.Subtask("cert-renew-scheduler", true)
 		defer task.Finish(nil)
 
 		for {
diff --git a/internal/utils/strutils/url_test.go b/internal/utils/strutils/url_test.go
index 756418c..2cda448 100644
--- a/internal/utils/strutils/url_test.go
+++ b/internal/utils/strutils/url_test.go
@@ -1,8 +1,9 @@
-package strutils
+package strutils_test
 
 import (
 	"testing"
 
+	. "github.com/yusing/go-proxy/internal/utils/strutils"
 	expect "github.com/yusing/go-proxy/internal/utils/testing"
 )