diff --git a/hrp/plugin.go b/hrp/plugin.go
index 952fbe9c..7d00540c 100644
--- a/hrp/plugin.go
+++ b/hrp/plugin.go
@@ -22,17 +22,15 @@ const (
 	projectInfoFile       = "proj.json"         // used for ensuring root project
 )
 
-func initPlugin(path string, logOn bool) (plugin funplugin.IPlugin, pluginDir string, err error) {
+func initPlugin(path string, logOn bool) (plugin funplugin.IPlugin, err error) {
 	// plugin file not found
 	if path == "" {
-		return nil, "", nil
+		return nil, nil
 	}
 	pluginPath, err := locatePlugin(path)
 	if err != nil {
-		return nil, "", nil
+		return nil, nil
 	}
-	// TODO: move pluginDir to funplugin
-	pluginDir = filepath.Dir(pluginPath)
 
 	// found plugin file
 	plugin, err = funplugin.Init(pluginPath, funplugin.WithLogOn(logOn))
diff --git a/hrp/runner.go b/hrp/runner.go
index 640e7af3..66bc6a9b 100644
--- a/hrp/runner.go
+++ b/hrp/runner.go
@@ -5,6 +5,7 @@ import (
 	"net"
 	"net/http"
 	"net/url"
+	"path/filepath"
 	"testing"
 	"time"
 
@@ -231,12 +232,12 @@ func (r *HRPRunner) newCaseRunner(testcase *TestCase) (*testCaseRunner, error) {
 	}
 
 	// init parser plugin
-	plugin, pluginDir, err := initPlugin(testcase.Config.Path, r.pluginLogOn)
+	plugin, err := initPlugin(testcase.Config.Path, r.pluginLogOn)
 	if err != nil {
 		return nil, errors.Wrap(err, "init plugin failed")
 	}
 	runner.parser.plugin = plugin
-	runner.rootDir = pluginDir
+	runner.rootDir = filepath.Dir(plugin.Path())
 
 	// parse testcase config
 	if err := runner.parseConfig(); err != nil {