How do you indicate which executor(s) vstest.console.exe should use?

How do I direct vstest.console.exe to use a specific executor (in my case I have a custom one that I wrote). It shows up when I ask for the list of executors (highlighted text):

c:\src\vstudio\PleskHostingIntegrationTests\bin>vstest.console.exe /ListExecutors /UseVsixExtensions:true Microsoft (R) Test Execution Command Line Tool Version 12.0.30501.0 Copyright (c) Microsoft Corporation. All rights reserved.

The following Test Execution Add-Ins are available: Microsoft.VisualStudio.TestPlatform.Extensions.GenericTestAdapter.GenericTestExecutor Uri: executor://GenericTestAdapter/v1 Microsoft.VisualStudio.TestPlatform.Extensions.MSAppContainerAdapter.MSAppContainerTestExecutor Uri: executor://MSAppContainerTestAdapter/v1 Microsoft.VisualStudio.TestPlatform.Extensions.MSAppContainerAdapter.MSPhoneTestExecutor Uri: executor://MSWPTestAdapter/v1 Microsoft.VisualStudio.TestPlatform.Extensions.OrderedTestAdapter.OrderedTestExecutor Uri: executor://OrderedTestAdapter/v1 Microsoft.VisualStudio.TestPlatform.Extensions.VSTestIntegration.MSTestExecutor Uri: executor://MSTestAdapter/v1 Microsoft.VisualStudio.TestTools.CppUnitTestFramework.CppUnitTestExtension.TestExecutor Uri: executor://CppWPUnitTestExecutor/v1 Microsoft.VisualStudio.TestTools.CppUnitTestFramework.CppUnitTestExtension.TestExecutor Uri: executor://CppUnitTestExecutor/v1 RetryRunner.RetryExecutor Uri: executor://RetryExecutor Microsoft.NodejsTools.TestAdapter.TestExecutor Uri: executor://NodejsTestExecutor/v1

But How do I tell vstest to use this one (versus the other ones)?