diff --git a/object/cert_test.go b/object/cert_test.go
index e780180..a9c3239 100644
--- a/object/cert_test.go
+++ b/object/cert_test.go
@@ -93,6 +93,12 @@ func TestCheckCerts(t *testing.T) {
 	casdoor.InitCasdoorConfig()
 	proxy.InitHttpClient()
 
+	var err error
+	certMap, err = getCertMap()
+	if err != nil {
+		panic(err)
+	}
+
 	site, err := getSite("admin", "test-site")
 	if err != nil {
 		panic(err)
diff --git a/object/site_cert.go b/object/site_cert.go
index ee95056..28e73a7 100644
--- a/object/site_cert.go
+++ b/object/site_cert.go
@@ -196,6 +196,10 @@ func (site *Site) checkCerts() error {
 	}
 
 	for _, domain := range domains {
+		if site.Owner != "admin" && strings.HasSuffix(domain, ".casdoor.com") {
+			continue
+		}
+
 		cert, err := GetCertByDomain(domain)
 		if err != nil {
 			return err