diff --git a/administrator/components/com_patchtester/language/en-GB/com_patchtester.sys.ini b/administrator/components/com_patchtester/language/en-GB/com_patchtester.sys.ini
index e418c57..5f75221 100644
--- a/administrator/components/com_patchtester/language/en-GB/com_patchtester.sys.ini
+++ b/administrator/components/com_patchtester/language/en-GB/com_patchtester.sys.ini
@@ -7,3 +7,7 @@ COM_PATCHTESTER="Joomla! Patch Tester"
 COM_PATCHTESTER_COULD_NOT_INSTALL_OVERRIDES="Could not install the template overrides for the following templates: %s"
 COM_PATCHTESTER_COULD_NOT_REMOVE_OVERRIDES="Could not remove the template overrides for the following templates: %s"
 COM_PATCHTESTER_XML_DESCRIPTION="Component for pull request management testing"
+COM_PATCHTESTER_UPDATE_TEXT="Patch Tester Update script. Patch Tester now updated to version %s."
+COM_PATCHTESTER_INSTALL_INSTRUCTIONS="<p>Thank you for installing the Joomla! Patch Tester.</p><p>To use the Joomla! Patch Tester you first need to setup your GitHub credentials in the Joomla! Patch Tester Options. <a href=""index.php?option=com_config&view=component&component=com_patchtester&returnurl=aW5kZXgucGhwP29wdGlvbj1jb21fcGF0Y2h0ZXN0ZXI=#authentication"" alt="Go to Options">Go to the Joomla! Patch Tester Options</a> to setup your credentials. After clicking on Save & Close you will be taken to the Joomla! Patch Tester where you can start using the Patch Tester."
+COM_PATCHTESTER_UPDATE_INSTRUCTIONS="<p>Thank you for updating the Joomla! Patch Tester.</p><p><a href=""index.php?option=com_patchtester"" alt="Go to Patch Tester">Go to the Joomla! Patch Tester</a></p>"
+COM_PATCHTESTER_UNINSTALL_THANK_YOU="Thank you for using the Joomla! Patch Tester for testing patches for the latest version of Joomla!"
diff --git a/administrator/components/com_patchtester/script.php b/administrator/components/com_patchtester/script.php
index 33946a4..d8cfba7 100644
--- a/administrator/components/com_patchtester/script.php
+++ b/administrator/components/com_patchtester/script.php
@@ -6,8 +6,11 @@
  * @license    GNU General Public License version 2 or later
  */
 
+use Joomla\CMS\Factory;
+use Joomla\CMS\HTML\HTMLHelper;
 use Joomla\CMS\Installer\Adapter\ComponentAdapter;
 use Joomla\CMS\Installer\InstallerScript;
+use Joomla\CMS\Language\Text;
 
 /**
  * Installation class to perform additional changes during install/uninstall/update
@@ -16,6 +19,7 @@ use Joomla\CMS\Installer\InstallerScript;
  */
 class Com_PatchtesterInstallerScript extends InstallerScript
 {
+
 	/**
 	 * Extension script constructor.
 	 *
@@ -34,6 +38,70 @@ class Com_PatchtesterInstallerScript extends InstallerScript
 			'/administrator/components/com_patchtester/PatchTester/Table',
 			'/components/com_patchtester',
 		);
+
+		Factory::getApplication()
+			->getLanguage()
+			->load('com_patchtester.sys', JPATH_ADMINISTRATOR, null, true);
+	}
+
+	/**
+	 * Show the message on install.
+	 *
+	 * @param   ComponentAdapter  $parent  The class calling this method
+	 *
+	 * @return  void
+	 *
+	 * @since   4.0.0
+	 */
+	public function install(ComponentAdapter $parent): void
+	{
+		?>
+		<h1>
+			<?php echo HTMLHelper::_('image', 'media/com_patchtester/images/icon-48-patchtester.png', Text::_('COM_PATCHTESTER')); ?>
+			<?php echo Text::_('COM_PATCHTESTER'); ?>
+		</h1>
+		<p><?php echo Text::_('COM_PATCHTESTER_INSTALL_INSTRUCTIONS'); ?></p>
+		<?php
+	}
+
+	/**
+	 * Show the message on install.
+	 *
+	 * @param   ComponentAdapter  $parent  The class calling this method
+	 *
+	 * @return  void
+	 *
+	 * @since   4.0.0
+	 */
+	public function update(ComponentAdapter $parent): void
+	{
+		?>
+		<h1>
+			<?php echo HTMLHelper::_('image', 'media/com_patchtester/images/icon-48-patchtester.png', Text::_('COM_PATCHTESTER')); ?>
+			<?php echo Text::_('COM_PATCHTESTER'); ?>
+		</h1>
+		<p><?php echo Text::_('COM_PATCHTESTER_UPDATE_INSTRUCTIONS'); ?></p>
+		<?php
+	}
+
+
+	/**
+	 * Show the message on install.
+	 *
+	 * @param   ComponentAdapter  $parent  The class calling this method
+	 *
+	 * @return  void
+	 *
+	 * @since   4.0.0
+	 */
+	public function uninstall(ComponentAdapter $parent): void
+	{
+		?>
+		<h1>
+			<?php echo HTMLHelper::_('image', 'media/com_patchtester/images/icon-48-patchtester.png', Text::_('COM_PATCHTESTER')); ?>
+		</h1>
+		<p><?php echo Text::_('COM_PATCHTESTER_UNINSTALL_THANK_YOU'); ?></p>
+		<?php
 	}
 
 	/**
@@ -46,7 +114,7 @@ class Com_PatchtesterInstallerScript extends InstallerScript
 	 *
 	 * @since   3.0.0
 	 */
-	public function postflight($type, $parent)
+	public function postflight(string $type, ComponentAdapter $parent): void
 	{
 		$this->removeFiles();
 	}