diff --git a/go.mod b/go.mod
index ac0c9edf0..e70c37bda 100644
--- a/go.mod
+++ b/go.mod
@@ -32,6 +32,7 @@ require (
 	github.com/rcrowley/go-metrics v0.0.0-20201227073835-cf1acfcdf475 // indirect
 	github.com/rifflock/lfshook v0.0.0-20180920164130-b9218ef580f5
 	github.com/sirupsen/logrus v1.6.0
+	github.com/stretchr/testify v1.7.0
 	github.com/tencentyun/qcloud-cos-sts-sdk v0.0.0-20210325043845-84a0811633ca
 	github.com/tmc/grpc-websocket-proxy v0.0.0-20190109142713-0ad062ec5ee5 // indirect
 	go.etcd.io/etcd v0.0.0-20200402134248-51bdeb39e698
diff --git a/go.sum b/go.sum
index fbbe5ea96..3cfde6ff6 100644
--- a/go.sum
+++ b/go.sum
@@ -233,6 +233,8 @@ github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UV
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
 github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd0=
 github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
+github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/tencentyun/qcloud-cos-sts-sdk v0.0.0-20210325043845-84a0811633ca h1:G/aIr3WiUesWHL2YGYgEqjM5tCAJ43Ml+0C18wDkWWs=
 github.com/tencentyun/qcloud-cos-sts-sdk v0.0.0-20210325043845-84a0811633ca/go.mod h1:b18KQa4IxHbxeseW1GcZox53d7J0z39VNONTxvvlkXw=
 github.com/tmc/grpc-websocket-proxy v0.0.0-20170815181823-89b8d40f7ca8/go.mod h1:ncp9v5uamzpCO7NfCPTXjqaC+bZgJeR0sMTm6dMHP7U=
diff --git a/src/utils/jwt_token.go b/src/utils/jwt_token.go
index 264da2483..65e42ca31 100644
--- a/src/utils/jwt_token.go
+++ b/src/utils/jwt_token.go
@@ -4,8 +4,9 @@ import (
 	"Open_IM/src/common/config"
 	"Open_IM/src/common/db"
 	"errors"
-	"github.com/dgrijalva/jwt-go"
 	"time"
+
+	"github.com/dgrijalva/jwt-go"
 )
 
 var (
@@ -25,21 +26,16 @@ type Claims struct {
 func BuildClaims(uid, accountAddr, platform string, ttl int64) Claims {
 	now := time.Now().Unix()
 	//if ttl=-1 Permanent token
-	if ttl == -1 {
-		return Claims{
-			UID:      uid,
-			Platform: platform,
-			StandardClaims: jwt.StandardClaims{
-				ExpiresAt: -1,
-				IssuedAt:  now,
-				NotBefore: now,
-			}}
+	expiresAt := int64(-1)
+	if ttl != -1 {
+		expiresAt = now + ttl
 	}
+
 	return Claims{
 		UID:      uid,
 		Platform: platform,
 		StandardClaims: jwt.StandardClaims{
-			ExpiresAt: now + ttl, //Expiration time
+			ExpiresAt: expiresAt, //Expiration time
 			IssuedAt:  now,       //Issuing time
 			NotBefore: now,       //Begin Effective time
 		}}
diff --git a/src/utils/jwt_token_test.go b/src/utils/jwt_token_test.go
new file mode 100644
index 000000000..d6c450305
--- /dev/null
+++ b/src/utils/jwt_token_test.go
@@ -0,0 +1,32 @@
+package utils
+
+import (
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func Test_BuildClaims(t *testing.T) {
+	uid := "1"
+	accountAddr := "accountAddr"
+	platform := "PC"
+	ttl := int64(-1)
+	claim := BuildClaims(uid, accountAddr, platform, ttl)
+	now := time.Now().Unix()
+
+	assert.Equal(t, claim.UID, uid, "uid should equal")
+	assert.Equal(t, claim.Platform, platform, "platform should equal")
+	assert.Equal(t, claim.StandardClaims.ExpiresAt, int64(-1), "StandardClaims.ExpiresAt should be equal")
+	// time difference within 1s
+	assert.Equal(t, claim.StandardClaims.IssuedAt, now, "StandardClaims.IssuedAt should be equal")
+	assert.Equal(t, claim.StandardClaims.NotBefore, now, "StandardClaims.NotBefore should be equal")
+
+	ttl = int64(60)
+	now = time.Now().Unix()
+	claim = BuildClaims(uid, accountAddr, platform, ttl)
+	// time difference within 1s
+	assert.Equal(t, claim.StandardClaims.ExpiresAt, int64(60)+now, "StandardClaims.ExpiresAt should be equal")
+	assert.Equal(t, claim.StandardClaims.IssuedAt, now, "StandardClaims.IssuedAt should be equal")
+	assert.Equal(t, claim.StandardClaims.NotBefore, now, "StandardClaims.NotBefore should be equal")
+}