@@ -23,7 +23,7 @@ func TestBoolValue(t *testing.T) {

 	for c, e := range cases {

 		v := url.Values{}

 		v.Set("test", c)

-		r, _ := http.NewRequest("POST", "", nil)

+		r, _ := http.NewRequest(http.MethodPost, "", nil)

 		r.Form = v

 		a := BoolValue(r, "test")

@@ -34,14 +34,14 @@ func TestBoolValue(t *testing.T) {

 }

 func TestBoolValueOrDefault(t *testing.T) {

-	r, _ := http.NewRequest("GET", "", nil)

+	r, _ := http.NewRequest(http.MethodGet, "", nil)

 	if !BoolValueOrDefault(r, "queryparam", true) {

 		t.Fatal("Expected to get true default value, got false")

 	}

 	v := url.Values{}

 	v.Set("param", "")

-	r, _ = http.NewRequest("GET", "", nil)

+	r, _ = http.NewRequest(http.MethodGet, "", nil)

 	r.Form = v

 	if BoolValueOrDefault(r, "param", true) {

 		t.Fatal("Expected not to get true")

@@ -59,7 +59,7 @@ func TestInt64ValueOrZero(t *testing.T) {

 	for c, e := range cases {

 		v := url.Values{}

 		v.Set("test", c)

-		r, _ := http.NewRequest("POST", "", nil)

+		r, _ := http.NewRequest(http.MethodPost, "", nil)

 		r.Form = v

 		a := Int64ValueOrZero(r, "test")

@@ -79,7 +79,7 @@ func TestInt64ValueOrDefault(t *testing.T) {

 	for c, e := range cases {

 		v := url.Values{}

 		v.Set("test", c)

-		r, _ := http.NewRequest("POST", "", nil)

+		r, _ := http.NewRequest(http.MethodPost, "", nil)

 		r.Form = v

 		a, err := Int64ValueOrDefault(r, "test", -1)

@@ -95,7 +95,7 @@ func TestInt64ValueOrDefault(t *testing.T) {

 func TestInt64ValueOrDefaultWithError(t *testing.T) {

 	v := url.Values{}

 	v.Set("test", "invalid")

-	r, _ := http.NewRequest("POST", "", nil)

+	r, _ := http.NewRequest(http.MethodPost, "", nil)

 	r.Form = v

 	_, err := Int64ValueOrDefault(r, "test", -1)

@@ -18,7 +18,7 @@ func DebugRequestMiddleware(handler func(ctx context.Context, w http.ResponseWri

 	return func(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {

 		logrus.Debugf("Calling %s %s", r.Method, r.RequestURI)

-		if r.Method != "POST" {

+		if r.Method != http.MethodPost {

 			return handler(ctx, w, r, vars)

 		}

 		if err := httputils.CheckForJSON(r); err != nil {

@@ -25,7 +25,7 @@ func TestVersionMiddlewareVersion(t *testing.T) {

 	m := NewVersionMiddleware(defaultVersion, defaultVersion, minVersion)

 	h := m.WrapHandler(handler)

-	req, _ := http.NewRequest("GET", "/containers/json", nil)

+	req, _ := http.NewRequest(http.MethodGet, "/containers/json", nil)

 	resp := httptest.NewRecorder()

 	ctx := context.Background()

@@ -76,7 +76,7 @@ func TestVersionMiddlewareWithErrorsReturnsHeaders(t *testing.T) {

 	m := NewVersionMiddleware(defaultVersion, defaultVersion, minVersion)

 	h := m.WrapHandler(handler)

-	req, _ := http.NewRequest("GET", "/containers/json", nil)

+	req, _ := http.NewRequest(http.MethodGet, "/containers/json", nil)

 	resp := httptest.NewRecorder()

 	ctx := context.Background()

@@ -22,7 +22,7 @@ func TestMiddlewares(t *testing.T) {

 	srv.UseMiddleware(middleware.NewVersionMiddleware("0.1omega2", api.DefaultVersion, api.MinVersion))

-	req, _ := http.NewRequest("GET", "/containers/json", nil)

+	req, _ := http.NewRequest(http.MethodGet, "/containers/json", nil)

 	resp := httptest.NewRecorder()

 	ctx := context.Background()