diff --git a/ctrd/client.go b/ctrd/client.go
index 12a7bc9a2..8aa1d5968 100644
--- a/ctrd/client.go
+++ b/ctrd/client.go
@@ -85,7 +85,7 @@ func NewClient(cfg Config) (APIClient, error) {
 }
 
 // Get will reture an available containerd grpc client,
-// Or occured an error
+// Or occurred an error
 func (c *Client) Get(ctx context.Context) (*WrapperClient, error) {
 	start := time.Now()
 
@@ -106,7 +106,7 @@ func (c *Client) Get(ctx context.Context) (*WrapperClient, error) {
 	end := time.Now()
 	elapsed := end.Sub(start)
 	logrus.WithFields(logrus.Fields{
-		"elasped": elapsed,
+		"elapsed": elapsed,
 	}).Debug("Get a grpc client")
 
 	return wrapperCli, nil
diff --git a/daemon/mgr/image.go b/daemon/mgr/image.go
index bad587dc6..d27e54ece 100644
--- a/daemon/mgr/image.go
+++ b/daemon/mgr/image.go
@@ -114,11 +114,7 @@ func (mgr *ImageManager) ListImages(ctx context.Context, filters string) ([]type
 // SearchImages searches imaged from specified registry.
 func (mgr *ImageManager) SearchImages(ctx context.Context, name string, registry string) ([]types.SearchResultItem, error) {
 	// Directly send API calls towards specified registry
-	if registry == "" {
-		registry = mgr.DefaultRegistry
-	}
-
-	return nil, nil
+	return nil, errtypes.ErrNotImplemented
 }
 
 // GetImage gets image by image id or ref.
diff --git a/pkg/errtypes/errors.go b/pkg/errtypes/errors.go
index 06a5fb37f..816de7bf8 100644
--- a/pkg/errtypes/errors.go
+++ b/pkg/errtypes/errors.go
@@ -25,6 +25,9 @@ var (
 
 	// ErrLockfailed represents that failed to lock.
 	ErrLockfailed = errorType{codeLockfailed, "lock failed"}
+
+	// ErrNotImplemented represents that the function is not implemented.
+	ErrNotImplemented = errorType{codeNotImplemented, "not implemented"}
 )
 
 const (
@@ -35,6 +38,7 @@ const (
 	codeInvalidType
 	codeTimeout
 	codeLockfailed
+	codeNotImplemented
 )
 
 type errorType struct {
diff --git a/pkg/quota/prjquota.go b/pkg/quota/prjquota.go
index 8dab76471..68ce9c6d9 100644
--- a/pkg/quota/prjquota.go
+++ b/pkg/quota/prjquota.go
@@ -120,6 +120,9 @@ func (quota *PrjQuota) SetDiskQuota(dir string, size string, quotaID int) error
 	}
 
 	limit, err := bytefmt.ToKilobytes(size)
+	if err != nil {
+		return fmt.Errorf("invalid size: %s %v", size, err)
+	}
 
 	// transfer limit from kbyte to byte
 	if err := quota.checkDevLimit(dir, limit*1024); err != nil {
diff --git a/test/environment/env.go b/test/environment/env.go
index 869a4747c..bf070a0fc 100644
--- a/test/environment/env.go
+++ b/test/environment/env.go
@@ -42,7 +42,7 @@ var (
 	Subnet = "192.168.1.0/24"
 )
 
-// GetBusybox get image info from test envrionment variable.
+// GetBusybox get image info from test environment variable.
 func GetBusybox() {
 	if len(os.Getenv("POUCH_BUSYBOXREPO")) != 0 {
 		BusyboxRepo = os.Getenv("POUCH_BUSYBOXREPO")
@@ -52,7 +52,7 @@ func GetBusybox() {
 	}
 }
 
-// GetHelloWorld get image info from test envrionment variable.
+// GetHelloWorld get image info from test environment variable.
 func GetHelloWorld() {
 	if len(os.Getenv("POUCH_HELLOWORLDREPO")) != 0 {
 		HelloworldRepo = os.Getenv("POUCH_HELLOWORLDREPO")
diff --git a/test/util_api.go b/test/util_api.go
index 687815290..99a2237d6 100644
--- a/test/util_api.go
+++ b/test/util_api.go
@@ -266,6 +266,7 @@ func PullImage(c *check.C, image string) {
 		q.Add("fromImage", image)
 		query := request.WithQuery(q)
 		resp, err = request.Post("/images/create", query)
+		c.Assert(err, check.IsNil)
 		c.Assert(resp.StatusCode, check.Equals, 200)
 	}
 }