diff --git a/test/e2e/plugins_test.go b/test/e2e/plugins_test.go
index e736e9b644..93cd4dbb5f 100644
--- a/test/e2e/plugins_test.go
+++ b/test/e2e/plugins_test.go
@@ -22,6 +22,7 @@ import (
 	"fmt"
 	"io/ioutil"
 	"os"
+	"os/exec"
 	"path/filepath"
 	"syscall"
 	"testing"
@@ -99,8 +100,10 @@ func TestPluginWithoutLookup(t *testing.T) {
 	knFlags := []string{fmt.Sprintf("--plugins-dir=%s", pc.knPluginsDir), "--lookup-plugins=false"}
 
 	t.Log("list plugin in --plugins-dir")
-	syscall.Exec("ls", []string{ "-l", pc.knPluginPath}, []string{})
-	syscall.Exec("ls", []string{ "-l", pc.knPluginPath2}, []string{})
+	t.Log("ls pluginPath:\n" + execute("ls", "-l", pc.knPluginPath))
+	t.Log("ls pluginPath2:\n" + execute("ls", "-l", pc.knPluginPath2))
+	syscall.Exec("ls", []string{"-l", pc.knPluginPath}, []string{})
+	syscall.Exec("ls", []string{"-l", pc.knPluginPath2}, []string{})
 	listPlugin(r, knFlags, []string{pc.knPluginPath}, []string{})
 
 	t.Log("execute plugin in --plugins-dir")
@@ -110,6 +113,19 @@ func TestPluginWithoutLookup(t *testing.T) {
 	listPlugin(r, knFlags, []string{pc.knPluginPath}, []string{pc.knPluginPath2})
 }
 
+func execute(command string, args ...string) string {
+	cmd := exec.Command(command, args...)
+	r, w, _ := os.Pipe()
+	cmd.Stdout = w
+	cmd.Stderr = os.Stderr
+	cmd.Stdin = os.Stdin
+	cmd.Env = os.Environ()
+	cmd.Run()
+	w.Close()
+	ret, _ := ioutil.ReadAll(r)
+	return string(ret)
+}
+
 func TestPluginWithLookup(t *testing.T) {
 	it, err := test.NewKnTest()
 	assert.NilError(t, err)
@@ -123,6 +139,8 @@ func TestPluginWithLookup(t *testing.T) {
 
 	knFlags := []string{fmt.Sprintf("--plugins-dir=%s", pc.knPluginsDir), "--lookup-plugins=true"}
 
+	t.Log("ls pluginPath:\n" + execute("ls", "-l", pc.knPluginPath))
+	t.Log("ls pluginPath2:\n" + execute("ls", "-l", pc.knPluginPath2))
 	t.Log("list plugin in --plugins-dir")
 	listPlugin(r, knFlags, []string{pc.knPluginPath}, []string{pc.knPluginPath2})