diff --git a/encoder_test.go b/encoder_test.go
index de752ba..ad49257 100644
--- a/encoder_test.go
+++ b/encoder_test.go
@@ -22,6 +22,7 @@ func TestWebpEncoder(t *testing.T) {
 	// test error
 	err := webpEncoder("./pics/empty.jpg", webp, 80, true, nil)
 	assert.NotNil(t, err)
+	_ = os.Remove(webp)
 }
 
 func TestNonImage(t *testing.T) {
@@ -29,14 +30,10 @@ func TestNonImage(t *testing.T) {
 	// test error
 	var err = webpEncoder("./pics/empty.jpg", webp, 80, true, nil)
 	assert.NotNil(t, err)
+	_ = os.Remove(webp)
+
 }
 
-func TestWriteFail(t *testing.T) {
-	// test permission denied
-	var webp = "/123.webp"
-	var err = webpEncoder("./pics/png.jpg", webp, 80, true, nil)
-	assert.NotNil(t, err)
-}
 func walker() []string {
 	var list []string
 	_ = filepath.Walk("./pics", func(path string, info os.FileInfo, err error) error {
diff --git a/helper_test.go b/helper_test.go
index b272236..db67f58 100644
--- a/helper_test.go
+++ b/helper_test.go
@@ -116,7 +116,7 @@ func TestChanErr(t *testing.T) {
 }
 
 func TestGetRemoteImageInfo(t *testing.T) {
-	url := "http://github.com/favicon.ico"
+	url := "https://github.com/favicon.ico"
 	statusCode, etag := getRemoteImageInfo(url)
 	assert.NotEqual(t, "", etag)
 	assert.Equal(t, statusCode, http.StatusOK)
diff --git a/router_test.go b/router_test.go
index c736433..5cb1923 100644
--- a/router_test.go
+++ b/router_test.go
@@ -121,7 +121,7 @@ func setupParam() {
 func requestToServer(url string, app *fiber.App, ua string) (*http.Response, []byte) {
 	req := httptest.NewRequest("GET", url, nil)
 	req.Header.Set("User-Agent", ua)
-	resp, _ := app.Test(req)
+	resp, _ := app.Test(req, 60000)
 	data, _ := ioutil.ReadAll(resp.Body)
 	return resp, data
 }