diff --git a/src/chartserver/reverse_proxy_test.go b/src/chartserver/reverse_proxy_test.go
new file mode 100644
index 000000000..44cfa0964
--- /dev/null
+++ b/src/chartserver/reverse_proxy_test.go
@@ -0,0 +1,55 @@
+package chartserver
+
+import (
+	"net/http"
+	"testing"
+)
+
+// Test the URL rewrite function
+func TestURLRewrite(t *testing.T) {
+	req, err := createRequest(http.MethodGet, "/api/chartrepo/health")
+	if err != nil {
+		t.Fatal(err)
+	}
+	rewriteURLPath(req)
+	if req.URL.Path != "/health" {
+		t.Fatalf("Expect url format %s but got %s", "/health", req.URL.Path)
+	}
+
+	req, err = createRequest(http.MethodGet, "/api/chartrepo/library/charts")
+	if err != nil {
+		t.Fatal(err)
+	}
+	rewriteURLPath(req)
+	if req.URL.Path != "/api/library/charts" {
+		t.Fatalf("Expect url format %s but got %s", "/api/library/charts", req.URL.Path)
+	}
+
+	req, err = createRequest(http.MethodPost, "/api/chartrepo/charts")
+	if err != nil {
+		t.Fatal(err)
+	}
+	rewriteURLPath(req)
+	if req.URL.Path != "/api/library/charts" {
+		t.Fatalf("Expect url format %s but got %s", "/api/library/charts", req.URL.Path)
+	}
+
+	req, err = createRequest(http.MethodGet, "/chartrepo/library/index.yaml")
+	if err != nil {
+		t.Fatal(err)
+	}
+	rewriteURLPath(req)
+	if req.URL.Path != "/library/index.yaml" {
+		t.Fatalf("Expect url format %s but got %s", "/library/index.yaml", req.URL.Path)
+	}
+}
+
+func createRequest(method string, url string) (*http.Request, error) {
+	req, err := http.NewRequest(method, url, nil)
+	if err != nil {
+		return nil, err
+	}
+	req.RequestURI = url
+
+	return req, nil
+}
diff --git a/src/chartserver/utils_test.go b/src/chartserver/utils_test.go
index fba83321c..7fb276e7f 100644
--- a/src/chartserver/utils_test.go
+++ b/src/chartserver/utils_test.go
@@ -1,6 +1,8 @@
 package chartserver
 
 import (
+	"encoding/json"
+	"os"
 	"strings"
 	"testing"
 )
@@ -40,3 +42,61 @@ func TestParseRedisConfig(t *testing.T) {
 		}
 	}
 }
+
+func TestGetCacheConfig(t *testing.T) {
+	// case 1: no cache set
+	cacheConf, err := getCacheConfig()
+	if err != nil || cacheConf != nil {
+		t.Fatal("expect nil cache config and nil error but got non-nil one when parsing empty cache settings")
+	}
+
+	// case 2: unknown cache type
+	os.Setenv(cacheDriverENVKey, "unknown")
+	_, err = getCacheConfig()
+	if err == nil {
+		t.Fatal("expect non-nil error but got nil one when parsing unknown cache type")
+	}
+
+	// case 3: in memory cache type
+	os.Setenv(cacheDriverENVKey, cacheDriverMem)
+	memCacheConf, err := getCacheConfig()
+	if err != nil || memCacheConf == nil || memCacheConf.DriverType != cacheDriverMem {
+		t.Fatal("expect in memory cache driver but got invalid one")
+	}
+
+	// case 4: wrong redis cache conf
+	os.Setenv(cacheDriverENVKey, cacheDriverRedis)
+	os.Setenv(redisENVKey, "")
+	_, err = getCacheConfig()
+	if err == nil {
+		t.Fatal("expect non-nil error but got nil one when parsing a invalid redis cache conf")
+	}
+
+	// case 5: redis cache conf
+	os.Setenv(redisENVKey, "redis:6379,100,Passw0rd,1")
+	redisConf, err := getCacheConfig()
+	if err != nil {
+		t.Fatalf("expect nil error but got non-nil one when parsing valid redis conf")
+	}
+
+	if redisConf == nil || redisConf.DriverType != cacheDriverRedis {
+		t.Fatal("expect redis cache driver but got invalid one")
+	}
+
+	conf := make(map[string]string)
+	if err = json.Unmarshal([]byte(redisConf.Config), &conf); err != nil {
+		t.Fatal(err)
+	}
+
+	if v, ok := conf["conn"]; !ok {
+		t.Fatal("expect 'conn' filed in the parsed conf but got nothing")
+	} else {
+		if v != "redis:6379" {
+			t.Fatalf("expect %s but got %s", "redis:6379", v)
+		}
+	}
+
+	// clear
+	os.Unsetenv(cacheDriverENVKey)
+	os.Unsetenv(redisENVKey)
+}
diff --git a/src/core/api/chart_repository.go b/src/core/api/chart_repository.go
index 59e0df9fc..4f069d347 100644
--- a/src/core/api/chart_repository.go
+++ b/src/core/api/chart_repository.go
@@ -12,7 +12,7 @@ import (
 	"strings"
 
 	"github.com/goharbor/harbor/src/common"
-	"github.com/goharbor/harbor/src/ui/label"
+	"github.com/goharbor/harbor/src/core/label"
 
 	"github.com/goharbor/harbor/src/chartserver"
 	hlog "github.com/goharbor/harbor/src/common/utils/log"