diff --git a/src/common/utils/clair/client_test.go b/src/common/utils/clair/client_test.go
new file mode 100644
index 000000000..4f0317cce
--- /dev/null
+++ b/src/common/utils/clair/client_test.go
@@ -0,0 +1,73 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+package clair
+
+import (
+	"os"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/vmware/harbor/src/common/models"
+	"github.com/vmware/harbor/src/common/utils/clair/test"
+)
+
+var (
+	notificationID = "ec45ec87-bfc8-4129-a1c3-d2b82622175a"
+	layerName      = "03adedf41d4e0ea1b2458546a5b4717bf5f24b23489b25589e20c692aaf84d19"
+	client         *Client
+)
+
+func TestMain(m *testing.M) {
+	mockClairServer := test.NewMockServer()
+	defer mockClairServer.Close()
+	client = NewClient(mockClairServer.URL, nil)
+	rc := m.Run()
+	if rc != 0 {
+		os.Exit(rc)
+	}
+}
+
+func TestListNamespaces(t *testing.T) {
+	assert := assert.New(t)
+	ns, err := client.ListNamespaces()
+	assert.Nil(err)
+	assert.Equal(25, len(ns))
+}
+
+func TestNotifications(t *testing.T) {
+	assert := assert.New(t)
+	n, err := client.GetNotification(notificationID)
+	assert.Nil(err)
+	assert.Equal(notificationID, n.Name)
+	_, err = client.GetNotification("noexist")
+	assert.NotNil(err)
+	err = client.DeleteNotification(notificationID)
+	assert.Nil(err)
+}
+
+func TestLaysers(t *testing.T) {
+	assert := assert.New(t)
+	layer := models.ClairLayer{
+		Name:       "fakelayer",
+		ParentName: "parent",
+		Path:       "http://registry:5000/layers/xxx",
+	}
+	err := client.ScanLayer(layer)
+	assert.Nil(err)
+	data, err := client.GetResult(layerName)
+	assert.Nil(err)
+	assert.Equal(layerName, data.Layer.Name)
+	_, err = client.GetResult("notexist")
+	assert.NotNil(err)
+}
diff --git a/src/common/utils/clair/test/notification.json b/src/common/utils/clair/test/notification.json
new file mode 100644
index 000000000..34c2ae17a
--- /dev/null
+++ b/src/common/utils/clair/test/notification.json
@@ -0,0 +1,62 @@
+{
+  "Notification": {
+    "Name": "ec45ec87-bfc8-4129-a1c3-d2b82622175a",
+    "Created": "1456247389",
+    "Notified": "1456246708",
+    "Limit": 2,
+    "Page": "gAAAAABWzJaC2JCH6Apr_R1f2EkjGdibnrKOobTcYXBWl6t0Cw6Q04ENGIymB6XlZ3Zi0bYt2c-2cXe43fvsJ7ECZhZz4P8C8F9efr_SR0HPiejzQTuG0qAzeO8klogFfFjSz2peBvgP",
+    "NextPage": "gAAAAABWzJaCTyr6QXP2aYsCwEZfWIkU2GkNplSMlTOhLJfiR3LorBv8QYgEIgyOvZRmHQEzJKvkI6TP2PkRczBkcD17GE89btaaKMqEX14yHDgyfQvdasW1tj3-5bBRt0esKi9ym5En",
+    "New": {
+      "Vulnerability": {
+        "Name": "CVE-TEST",
+        "NamespaceName": "debian:8",
+        "Description": "New CVE",
+        "Severity": "Low",
+        "FixedIn": [
+          {
+            "Name": "grep",
+            "NamespaceName": "debian:8",
+            "Version": "2.25"
+          }
+        ]
+      },
+      "OrderedLayersIntroducingVulnerability": [
+        {
+          "Index": 1,
+          "LayerName": "523ef1d23f222195488575f52a39c729c76a8c5630c9a194139cb246fb212da6"
+        },
+        {
+          "Index": 2,
+          "LayerName": "3b59c795b34670618fbcace4dac7a27c5ecec156812c9e2c90d3f4be1916b12d"
+        }
+      ],
+      "LayersIntroducingVulnerability": [
+        "523ef1d23f222195488575f52a39c729c76a8c5630c9a194139cb246fb212da6",
+        "3b59c795b34670618fbcace4dac7a27c5ecec156812c9e2c90d182371916b12d"
+      ]
+    },
+    "Old": {
+      "Vulnerability": {
+        "Name": "CVE-TEST",
+        "NamespaceName": "debian:8",
+        "Description": "New CVE",
+        "Severity": "Low",
+        "FixedIn": []
+      },
+      "OrderedLayersIntroducingVulnerability": [
+        {
+          "Index": 1,
+          "LayerName": "523ef1d23f222195488575f52a39c729c76a8c5630c9a194139cb246fb212da6"
+        },
+        {
+          "Index": 2,
+          "LayerName": "3b59c795b34670618fbcace4dac7a27c5ecec156812c9e2c90d3f4be1916b12d"
+        }
+      ],
+      "LayersIntroducingVulnerability": [
+        "3b59c795b34670618fbcace4dac7a27c5ecec156812c9e2c90d3f4be1916b12d",
+        "523ef1d23f222195488575f52a39c729c76a8c5630c9a194139cb246fb212da6"
+      ]
+    }
+  }
+}
\ No newline at end of file
diff --git a/src/common/utils/clair/test/ns.json b/src/common/utils/clair/test/ns.json
new file mode 100644
index 000000000..2faa49eb1
--- /dev/null
+++ b/src/common/utils/clair/test/ns.json
@@ -0,0 +1 @@
+{"Namespaces":[{"Name":"debian:7","VersionFormat":"dpkg"},{"Name":"debian:unstable","VersionFormat":"dpkg"},{"Name":"debian:9","VersionFormat":"dpkg"},{"Name":"debian:10","VersionFormat":"dpkg"},{"Name":"debian:8","VersionFormat":"dpkg"},{"Name":"alpine:v3.6","VersionFormat":"dpkg"},{"Name":"alpine:v3.5","VersionFormat":"dpkg"},{"Name":"alpine:v3.4","VersionFormat":"dpkg"},{"Name":"alpine:v3.3","VersionFormat":"dpkg"},{"Name":"oracle:6","VersionFormat":"rpm"},{"Name":"oracle:7","VersionFormat":"rpm"},{"Name":"oracle:5","VersionFormat":"rpm"},{"Name":"ubuntu:14.04","VersionFormat":"dpkg"},{"Name":"ubuntu:15.10","VersionFormat":"dpkg"},{"Name":"ubuntu:17.04","VersionFormat":"dpkg"},{"Name":"ubuntu:16.04","VersionFormat":"dpkg"},{"Name":"ubuntu:12.04","VersionFormat":"dpkg"},{"Name":"ubuntu:13.04","VersionFormat":"dpkg"},{"Name":"ubuntu:14.10","VersionFormat":"dpkg"},{"Name":"ubuntu:12.10","VersionFormat":"dpkg"},{"Name":"ubuntu:16.10","VersionFormat":"dpkg"},{"Name":"ubuntu:15.04","VersionFormat":"dpkg"},{"Name":"centos:6","VersionFormat":"rpm"},{"Name":"centos:7","VersionFormat":"rpm"},{"Name":"centos:5","VersionFormat":"rpm"}]}
diff --git a/src/common/utils/clair/test/server.go b/src/common/utils/clair/test/server.go
new file mode 100644
index 000000000..ebdaf8ac5
--- /dev/null
+++ b/src/common/utils/clair/test/server.go
@@ -0,0 +1,117 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package test
+
+import (
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"net/http/httptest"
+	"path"
+	"runtime"
+	"strings"
+
+	"github.com/vmware/harbor/src/common/models"
+	"github.com/vmware/harbor/src/common/utils/log"
+)
+
+func currPath() string {
+	_, f, _, ok := runtime.Caller(0)
+	if !ok {
+		panic("Failed to get current directory")
+	}
+	return path.Dir(f)
+}
+
+func serveFile(rw http.ResponseWriter, p string) {
+	data, err := ioutil.ReadFile(p)
+	if err != nil {
+		http.Error(rw, err.Error(), 500)
+	}
+
+	_, err2 := rw.Write(data)
+	if err2 != nil {
+		http.Error(rw, err2.Error(), 500)
+	}
+}
+
+type notificationHandler struct {
+	id string
+}
+
+func (n *notificationHandler) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
+	suffix := strings.TrimPrefix(req.URL.Path, "/v1/notifications/")
+	if req.Method == http.MethodDelete {
+		rw.WriteHeader(200)
+	} else if req.Method == http.MethodGet {
+		if strings.HasPrefix(suffix, n.id) {
+			serveFile(rw, path.Join(currPath(), "notification.json"))
+		} else {
+			rw.WriteHeader(404)
+		}
+	} else {
+		rw.WriteHeader(http.StatusMethodNotAllowed)
+	}
+}
+
+type layerHandler struct {
+	name string
+}
+
+func (l *layerHandler) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
+	if req.Method == http.MethodPost {
+		data, err := ioutil.ReadAll(req.Body)
+		defer req.Body.Close()
+		if err != nil {
+			http.Error(rw, err.Error(), 500)
+		}
+		layer := &models.ClairLayerEnvelope{}
+		if err := json.Unmarshal(data, layer); err != nil {
+			http.Error(rw, err.Error(), http.StatusBadRequest)
+		}
+		rw.WriteHeader(http.StatusCreated)
+	} else if req.Method == http.MethodGet {
+		name := strings.TrimPrefix(req.URL.Path, "/v1/layers/")
+		if name == l.name {
+			serveFile(rw, path.Join(currPath(), "total-12.json"))
+		} else {
+			http.Error(rw, fmt.Sprintf("Invalid layer name: %s", name), http.StatusNotFound)
+		}
+	} else {
+		http.Error(rw, "", http.StatusMethodNotAllowed)
+	}
+}
+
+// NewMockServer ...
+func NewMockServer() *httptest.Server {
+	mux := http.NewServeMux()
+	mux.HandleFunc("/v1/namespaces", func(rw http.ResponseWriter, req *http.Request) {
+		if req.Method == http.MethodGet {
+			serveFile(rw, path.Join(currPath(), "ns.json"))
+		} else {
+			rw.WriteHeader(http.StatusMethodNotAllowed)
+		}
+	})
+	mux.Handle("/v1/notifications/", &notificationHandler{id: "ec45ec87-bfc8-4129-a1c3-d2b82622175a"})
+	mux.Handle("/v1/layers", &layerHandler{name: "03adedf41d4e0ea1b2458546a5b4717bf5f24b23489b25589e20c692aaf84d19"})
+	mux.Handle("/v1/layers/", &layerHandler{name: "03adedf41d4e0ea1b2458546a5b4717bf5f24b23489b25589e20c692aaf84d19"})
+	mux.HandleFunc("/", func(rw http.ResponseWriter, req *http.Request) {
+		log.Infof("method: %s, path: %s", req.Method, req.URL.Path)
+		rw.WriteHeader(http.StatusNotFound)
+	},
+	)
+	return httptest.NewServer(mux)
+}