diff --git a/pkg/filesystem/filesystem.go b/pkg/filesystem/filesystem.go
index 90bad07..be0b825 100644
--- a/pkg/filesystem/filesystem.go
+++ b/pkg/filesystem/filesystem.go
@@ -7,6 +7,7 @@ import (
 	"github.com/HFO4/cloudreve/pkg/filesystem/local"
 	"github.com/HFO4/cloudreve/pkg/filesystem/remote"
 	"github.com/HFO4/cloudreve/pkg/filesystem/response"
+	"github.com/HFO4/cloudreve/pkg/request"
 	"github.com/HFO4/cloudreve/pkg/serializer"
 	"github.com/gin-gonic/gin"
 	"io"
@@ -152,6 +153,7 @@ func (fs *FileSystem) dispatchHandler() error {
 	case "remote":
 		fs.Handler = remote.Handler{
 			Policy: currentPolicy,
+			Client: request.HTTPClient{},
 		}
 		return nil
 	default:
diff --git a/pkg/filesystem/remote/handler.go b/pkg/filesystem/remote/handler.go
index f83b662..f80715d 100644
--- a/pkg/filesystem/remote/handler.go
+++ b/pkg/filesystem/remote/handler.go
@@ -22,7 +22,7 @@ import (
 
 // Handler 远程存储策略适配器
 type Handler struct {
-	client request.HTTPClient
+	Client request.Client
 	Policy *model.Policy
 }
 
@@ -69,7 +69,7 @@ func (handler Handler) Delete(ctx context.Context, files []string) ([]string, er
 	// 发送删除请求
 	bodyReader := strings.NewReader(string(reqBodyEncoded))
 	authInstance := auth.HMACAuth{SecretKey: []byte(handler.Policy.SecretKey)}
-	resp, err := handler.client.Request(
+	resp, err := handler.Client.Request(
 		"POST",
 		handler.getAPI("delete"),
 		bodyReader,
@@ -87,9 +87,11 @@ func (handler Handler) Delete(ctx context.Context, files []string) ([]string, er
 	}
 	if reqResp.Code != 0 {
 		var failedResp serializer.RemoteDeleteRequest
-		err = json.Unmarshal([]byte(reqResp.Data.(string)), &failedResp)
-		if err == nil {
-			return failedResp.Files, errors.New(reqResp.Error)
+		if failed, ok := reqResp.Data.(string); ok {
+			err = json.Unmarshal([]byte(failed), &failedResp)
+			if err == nil {
+				return failedResp.Files, errors.New(reqResp.Error)
+			}
 		}
 		return files, errors.New("未知的返回结果格式")
 	}
diff --git a/pkg/filesystem/remote/handler_test.go b/pkg/filesystem/remote/handler_test.go
index 5a24465..1cc5b9e 100644
--- a/pkg/filesystem/remote/handler_test.go
+++ b/pkg/filesystem/remote/handler_test.go
@@ -6,9 +6,15 @@ import (
 	"github.com/HFO4/cloudreve/pkg/auth"
 	"github.com/HFO4/cloudreve/pkg/cache"
 	"github.com/HFO4/cloudreve/pkg/filesystem/fsctx"
+	"github.com/HFO4/cloudreve/pkg/request"
 	"github.com/HFO4/cloudreve/pkg/serializer"
 	"github.com/stretchr/testify/assert"
+	testMock "github.com/stretchr/testify/mock"
+	"io"
+	"io/ioutil"
+	"net/http"
 	"net/url"
+	"strings"
 	"testing"
 )
 
@@ -85,3 +91,93 @@ func TestHandler_Source(t *testing.T) {
 		asserts.Contains(res, "api/v3/slave/source/0")
 	}
 }
+
+type ClientMock struct {
+	testMock.Mock
+}
+
+func (m ClientMock) Request(method, target string, body io.Reader, opts ...request.Option) request.Response {
+	args := m.Called(method, target, body, opts)
+	return args.Get(0).(request.Response)
+}
+
+func TestHandler_Delete(t *testing.T) {
+	asserts := assert.New(t)
+	handler := Handler{
+		Policy: &model.Policy{
+			SecretKey: "test",
+			Server:    "http://test.com",
+		},
+	}
+	ctx := context.Background()
+
+	// 成功
+	{
+		clientMock := ClientMock{}
+		clientMock.On(
+			"Request",
+			"POST",
+			"http://test.com/api/v3/slave/delete",
+			testMock.Anything,
+			testMock.Anything,
+		).Return(request.Response{
+			Err: nil,
+			Response: &http.Response{
+				StatusCode: 200,
+				Body:       ioutil.NopCloser(strings.NewReader(`{"code":0}`)),
+			},
+		})
+		handler.Client = clientMock
+		failed, err := handler.Delete(ctx, []string{"/test1.txt", "test2.txt"})
+		clientMock.AssertExpectations(t)
+		asserts.NoError(err)
+		asserts.Len(failed, 0)
+
+	}
+
+	// 结果解析失败
+	{
+		clientMock := ClientMock{}
+		clientMock.On(
+			"Request",
+			"POST",
+			"http://test.com/api/v3/slave/delete",
+			testMock.Anything,
+			testMock.Anything,
+		).Return(request.Response{
+			Err: nil,
+			Response: &http.Response{
+				StatusCode: 200,
+				Body:       ioutil.NopCloser(strings.NewReader(`{"code":203}`)),
+			},
+		})
+		handler.Client = clientMock
+		failed, err := handler.Delete(ctx, []string{"/test1.txt", "test2.txt"})
+		clientMock.AssertExpectations(t)
+		asserts.Error(err)
+		asserts.Len(failed, 2)
+	}
+
+	// 一个失败
+	{
+		clientMock := ClientMock{}
+		clientMock.On(
+			"Request",
+			"POST",
+			"http://test.com/api/v3/slave/delete",
+			testMock.Anything,
+			testMock.Anything,
+		).Return(request.Response{
+			Err: nil,
+			Response: &http.Response{
+				StatusCode: 200,
+				Body:       ioutil.NopCloser(strings.NewReader(`{"code":203,"data":"{\"files\":[\"1\"]}"}`)),
+			},
+		})
+		handler.Client = clientMock
+		failed, err := handler.Delete(ctx, []string{"/test1.txt", "test2.txt"})
+		clientMock.AssertExpectations(t)
+		asserts.Error(err)
+		asserts.Len(failed, 1)
+	}
+}