diff --git a/components/engine/pkg/testutil/golden/golden.go b/components/engine/pkg/testutil/golden/golden.go
deleted file mode 100644
index 8f725da7bf..0000000000
--- a/components/engine/pkg/testutil/golden/golden.go
+++ /dev/null
@@ -1,28 +0,0 @@
-// Package golden provides function and helpers to use golden file for
-// testing purpose.
-package golden
-
-import (
-	"flag"
-	"io/ioutil"
-	"path/filepath"
-	"testing"
-)
-
-var update = flag.Bool("test.update", false, "update golden file")
-
-// Get returns the golden file content. If the `test.update` is specified, it updates the
-// file with the current output and returns it.
-func Get(t *testing.T, actual []byte, filename string) []byte {
-	golden := filepath.Join("testdata", filename)
-	if *update {
-		if err := ioutil.WriteFile(golden, actual, 0644); err != nil {
-			t.Fatal(err)
-		}
-	}
-	expected, err := ioutil.ReadFile(golden)
-	if err != nil {
-		t.Fatal(err)
-	}
-	return expected
-}
diff --git a/components/engine/pkg/testutil/tempfile/tempfile.go b/components/engine/pkg/testutil/tempfile/tempfile.go
deleted file mode 100644
index 01474babff..0000000000
--- a/components/engine/pkg/testutil/tempfile/tempfile.go
+++ /dev/null
@@ -1,56 +0,0 @@
-package tempfile
-
-import (
-	"io/ioutil"
-	"os"
-
-	"github.com/stretchr/testify/require"
-)
-
-// TempFile is a temporary file that can be used with unit tests. TempFile
-// reduces the boilerplate setup required in each test case by handling
-// setup errors.
-type TempFile struct {
-	File *os.File
-}
-
-// NewTempFile returns a new temp file with contents
-func NewTempFile(t require.TestingT, prefix string, content string) *TempFile {
-	file, err := ioutil.TempFile("", prefix+"-")
-	require.NoError(t, err)
-
-	_, err = file.Write([]byte(content))
-	require.NoError(t, err)
-	file.Close()
-	return &TempFile{File: file}
-}
-
-// Name returns the filename
-func (f *TempFile) Name() string {
-	return f.File.Name()
-}
-
-// Remove removes the file
-func (f *TempFile) Remove() {
-	os.Remove(f.Name())
-}
-
-// TempDir is a temporary directory that can be used with unit tests. TempDir
-// reduces the boilerplate setup required in each test case by handling
-// setup errors.
-type TempDir struct {
-	Path string
-}
-
-// NewTempDir returns a new temp file with contents
-func NewTempDir(t require.TestingT, prefix string) *TempDir {
-	path, err := ioutil.TempDir("", prefix+"-")
-	require.NoError(t, err)
-
-	return &TempDir{Path: path}
-}
-
-// Remove removes the file
-func (f *TempDir) Remove() {
-	os.Remove(f.Path)
-}