diff --git a/hrp/step_mobile_ui.go b/hrp/step_mobile_ui.go
index 5890eec4..8c22570d 100644
--- a/hrp/step_mobile_ui.go
+++ b/hrp/step_mobile_ui.go
@@ -652,7 +652,6 @@ func runStepMobileUI(s *SessionRunner, step *TStep) (stepResult *StepResult, err
 		for key, value := range session.GetAll() {
 			attachments[key] = value
 		}
-		session.Init() // clear step cache
 		stepResult.Attachments = attachments
 	}()
 
diff --git a/hrp/summary.go b/hrp/summary.go
index eaf541d7..6ae9cf69 100644
--- a/hrp/summary.go
+++ b/hrp/summary.go
@@ -164,7 +164,7 @@ type TestCaseSummary struct {
 	InOut   *TestCaseInOut `json:"in_out" yaml:"in_out"`
 	Logs    []interface{}  `json:"logs,omitempty" yaml:"logs,omitempty"`
 	Records []*StepResult  `json:"records" yaml:"records"`
-	RootDir string         `json:"root_dir" yaml:"root_dir"`
+	RootDir string         `json:"root_dir,omitempty" yaml:"root_dir,omitempty"`
 }
 
 // AddStepResult updates summary of StepResult.
diff --git a/hrp/summary_test.go b/hrp/summary_test.go
index cf440f59..e85ea941 100644
--- a/hrp/summary_test.go
+++ b/hrp/summary_test.go
@@ -25,7 +25,12 @@ func TestGenHTMLReport(t *testing.T) {
 	caseSummary2.AddStepResult(stepResult2)
 	summary.AddCaseSummary(caseSummary2)
 
-	err := summary.GenHTMLReport()
+	err := summary.GenSummary()
+	if err != nil {
+		t.Error(err)
+	}
+
+	err = summary.GenHTMLReport()
 	if err != nil {
 		t.Error(err)
 	}