@@ -3,17 +3,16 @@ package libnetwork

 import (

 	"testing"

+	"github.com/docker/docker/errdefs"

 	"github.com/docker/docker/libnetwork/types"

+	"gotest.tools/v3/assert"

+	is "gotest.tools/v3/assert/cmp"

 )

 func TestErrorInterfaces(t *testing.T) {

 	badRequestErrorList := []error{ErrInvalidID(""), ErrInvalidName("")}

 	for _, err := range badRequestErrorList {

-		switch u := err.(type) {

-		case types.InvalidParameterError:

-		default:

-			t.Errorf("Failed to detect err %v is of type InvalidParameterError. Got type: %T", err, u)

-		}

+		assert.Check(t, is.ErrorType(err, errdefs.IsInvalidParameter))

 	}

 	maskableErrorList := []error{ManagerRedirectError("")}

@@ -27,19 +26,11 @@ func TestErrorInterfaces(t *testing.T) {

 	notFoundErrorList := []error{&UnknownNetworkError{}, ErrNoSuchNetwork(""), ErrNoSuchEndpoint("")}

 	for _, err := range notFoundErrorList {

-		switch u := err.(type) {

-		case types.NotFoundError:

-		default:

-			t.Errorf("Failed to detect err %v is of type NotFoundError. Got type: %T", err, u)

-		}

+		assert.Check(t, is.ErrorType(err, errdefs.IsNotFound))

 	}

 	forbiddenErrorList := []error{&ActiveContainerError{}}

 	for _, err := range forbiddenErrorList {

-		switch u := err.(type) {

-		case types.ForbiddenError:

-		default:

-			t.Errorf("Failed to detect err %v is of type ForbiddenError. Got type: %T", err, u)

-		}

+		assert.Check(t, is.ErrorType(err, errdefs.IsForbidden))

 	}

 }