My Custom product tab not displaying in Magento 2

I am trying to inject my custom product tab in storefront on product view page, but it's not displaying. For this I am written below code.

registration.php

<?php
\Magento\Framework\Component\ComponentRegistrar::register(
    \Magento\Framework\Component\ComponentRegistrar::MODULE,
    'Test_ProductTabs',
    __DIR__
);

Test/ProductTabs/Block/CustomTab.php

<?php
namespace Test\ProductTabs\Block;

use Magento\Catalog\Model\Product;

class CustomTab extends \Magento\Framework\View\Element\Template{

    /**
     * @var Product
     */
    protected $_product = null;

    /**
     * Core registry
     *
     * @var \Magento\Framework\Registry
     */
    protected $_coreRegistry = null;

    /**
     * @param \Magento\Framework\View\Element\Template\Context $context
     * @param \Magento\Framework\Registry $registry
     * @param array $data
     */
    public function __construct(
        \Magento\Framework\View\Element\Template\Context $context,
        \Magento\Framework\Registry $registry,
        array $data = []
    ) {
        $this->_coreRegistry = $registry;
        parent::__construct($context, $data);
    }

    /**
     * @return Product
     */
    public function getProduct()
    {
        if (!$this->_product) {
            $this->_product = $this->_coreRegistry->registry('product');
        }
        return $this->_product;
    }

}

Test/ProductTabs/etc/module.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/module.xsd">
    <module name="Test_ProductTabs" setup_version="1.0.0">
        <sequence>
            <module name="Magento_Catalog"/>
        </sequence>
    </module>
</config>

Test/ProductTabs/view/layout/catalog_product_view_.xml

<?xml version="1.0"?>
<page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd">
   <body>
        <referenceBlock name="product.info.details">
           <block class="Test\ProductTabs\Block\CustomTab" name="mycustom.tab" as="mycustom" template="Test_ProductTabs::kit.phtml" group="detailed_info">
               <arguments>
                   <argument name="title" translate="true" xsi:type="string">Kit Components</argument>
               </arguments>
           </block>
       </referenceBlock>
   </body>
</page>

Test/ProductTabs/view/templates/kit.phtml

<h1>Kit Components</h1>

above code is not working for me. Any help on this?

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My Custom product tab not displaying in Magento 2