diff --git a/.github/workflows/e2e.yml b/.github/workflows/e2e.yml
index 84062bd2..d6fd552f 100644
--- a/.github/workflows/e2e.yml
+++ b/.github/workflows/e2e.yml
@@ -27,7 +27,7 @@ jobs:
       matrix:
         core:
           - {name: 'WP latest', version: 'latest'}
-          - {name: 'WP minimum', version: 'WordPress/WordPress#6.4'}
+          - {name: 'WP minimum', version: 'WordPress/WordPress#6.6'}
           - {name: 'WP trunk', version: 'WordPress/WordPress#master'}
 
     steps:
diff --git a/assets/css/admin.css b/assets/css/admin.css
index 9014abd5..2ca927a4 100644
--- a/assets/css/admin.css
+++ b/assets/css/admin.css
@@ -1449,6 +1449,7 @@ input[type=radio].mailchimp-sf-radio {
 
 input[type=radio].mailchimp-sf-radio:checked {
 	border: 2px solid var(--mailchimp-color-link);
+	background-color: #fff;
 }
 
 input[type=radio].mailchimp-sf-radio:checked:before {
diff --git a/includes/admin/admin-notices.php b/includes/admin/admin-notices.php
index 16dd25b3..6c8ff261 100644
--- a/includes/admin/admin-notices.php
+++ b/includes/admin/admin-notices.php
@@ -9,73 +9,28 @@
 
 /**
  * Display success admin notice.
- *
- * NOTE: WordPress localization i18n functionality should be done
- * on string literals outside of this function in order to work
- * correctly.
- *
- * For more info read here: https://salferrarello.com/why-__-needs-a-hardcoded-string-in-wordpress/
+ * This function is now a wrapper around the Mailchimp_Admin_Notices class, will be deprecated in future versions. Use that class instead.
  *
  * @since 1.7.0
+ * @since x.x.x - Moved notice rendering to class-mailchimp-admin-notices.php
+ *
  * @param string $msg The message to display.
  * @return void
  */
 function admin_notice_success( string $msg ) {
-	?>
-	<div class="notice notice-success is-dismissible">
-		<p>
-		<?php
-		echo wp_kses(
-			$msg,
-			array(
-				'a'      => array(
-					'href'   => array(),
-					'title'  => array(),
-					'target' => array(),
-				),
-				'strong' => array(),
-				'em'     => array(),
-				'br'     => array(),
-			)
-		);
-		?>
-		</p>
-	</div>
-	<?php
+	\Mailchimp_Admin_Notices::instance()->add( $msg, 'success' );
 }
 
 /**
  * Display error admin notice.
- *
- * NOTE: WordPress localization i18n functionality should be done
- * on string literals outside of this function in order to work
- * correctly.
- *
- * For more info read here: https://salferrarello.com/why-__-needs-a-hardcoded-string-in-wordpress/
+ * This function is now a wrapper around the Mailchimp_Admin_Notices class, will be deprecated in future versions. Use that class instead.
  *
  * @since 1.7.0
+ * @since x.x.x - Moved notice rendering to class-mailchimp-admin-notices.php
+ *
  * @param string $msg The message to display.
  * @return void
  */
 function admin_notice_error( string $msg ) {
-	?>
-	<div class="notice notice-error">
-		<p>
-		<?php
-		echo wp_kses(
-			$msg,
-			array(
-				'a'      => array(
-					'href'   => array(),
-					'title'  => array(),
-					'target' => array(),
-				),
-				'strong' => array(),
-				'em'     => array(),
-			)
-		);
-		?>
-		</p>
-	</div>
-	<?php
+	\Mailchimp_Admin_Notices::instance()->add( $msg, 'error' );
 }
diff --git a/includes/admin/class-mailchimp-admin-notices.php b/includes/admin/class-mailchimp-admin-notices.php
new file mode 100644
index 00000000..5d8d4df2
--- /dev/null
+++ b/includes/admin/class-mailchimp-admin-notices.php
@@ -0,0 +1,129 @@
+<?php
+/**
+ * Mailchimp admin notices class.
+ *
+ * Registers notices and renders them on the admin_notices hook in the same request.
+ *
+ * @since x.x.x
+ *
+ * @package Mailchimp
+ */
+
+// Exit if accessed directly.
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+
+/**
+ * Class Mailchimp_Admin_Notices
+ *
+ * @since x.x.x
+ */
+class Mailchimp_Admin_Notices {
+
+	/**
+	 * Singleton instance.
+	 *
+	 * @var Mailchimp_Admin_Notices|null
+	 */
+	private static $instance = null;
+
+	/**
+	 * Queued notices for the current request.
+	 *
+	 * @var array<int, array{message: string, type: string}>
+	 */
+	private $notices = array();
+
+	/**
+	 * Get the singleton instance.
+	 *
+	 * @return Mailchimp_Admin_Notices
+	 */
+	public static function instance(): Mailchimp_Admin_Notices {
+		if ( null === self::$instance ) {
+			self::$instance = new self();
+		}
+
+		return self::$instance;
+	}
+
+	/**
+	 * Register the admin_notices hook.
+	 *
+	 * @return void
+	 */
+	public function init() {
+		add_action( 'admin_notices', array( $this, 'render' ) );
+	}
+
+	/**
+	 * Queue an admin notice.
+	 *
+	 * @param string $message Notice message (already escaped/translated by caller).
+	 * @param string $type    Notice type: success or error.
+	 * @return void
+	 */
+	public function add( string $message, string $type ) {
+		if ( ! is_admin() ) {
+			return;
+		}
+
+		if ( did_action( 'admin_notices' ) ) {
+			$this->print_notice( $message, $type );
+			return;
+		}
+
+		$this->notices[] = array(
+			'message' => $message,
+			'type'    => $type,
+		);
+	}
+
+	/**
+	 * Render all queued notices.
+	 *
+	 * @return void
+	 */
+	public function render() {
+		foreach ( $this->notices as $notice ) {
+			$this->print_notice( $notice['message'], $notice['type'] );
+		}
+
+		$this->notices = array();
+	}
+
+	/**
+	 * Print a single admin notice.
+	 *
+	 * @param string $message Notice message.
+	 * @param string $type    Notice type: success or error.
+	 * @return void
+	 */
+	private function print_notice( string $message, string $type ) {
+		$classes = array( 'notice', 'notice-' . sanitize_html_class( $type ) );
+
+		if ( 'success' === $type ) {
+			$classes[] = 'is-dismissible';
+		}
+
+		$allowed_html = array(
+			'a'      => array(
+				'href'   => array(),
+				'title'  => array(),
+				'target' => array(),
+			),
+			'strong' => array(),
+			'em'     => array(),
+			'br'     => array(),
+		);
+
+		?>
+		<div class="<?php echo esc_attr( implode( ' ', $classes ) ); ?>">
+			<p>
+				<?php echo wp_kses( $message, $allowed_html ); ?>
+			</p>
+		</div>
+		<?php
+	}
+}
diff --git a/includes/class-mailchimp-admin.php b/includes/class-mailchimp-admin.php
index 3805336a..b681ed6b 100644
--- a/includes/class-mailchimp-admin.php
+++ b/includes/class-mailchimp-admin.php
@@ -48,6 +48,8 @@ public function init() {
 		add_action( 'admin_menu', array( $this, 'add_admin_menu_pages' ) );
 		add_filter( 'admin_footer_text', array( $this, 'admin_footer_text' ) );
 
+		Mailchimp_Admin_Notices::instance()->init();
+
 		$user_sync = new Mailchimp_User_Sync();
 		$user_sync->init();
 	}
diff --git a/mailchimp.php b/mailchimp.php
index caf1cd26..7e539a12 100644
--- a/mailchimp.php
+++ b/mailchimp.php
@@ -5,7 +5,7 @@
  * Description:       Add a Mailchimp signup form block, widget or shortcode to your WordPress site.
  * Text Domain:       mailchimp
  * Version:           2.0.1
- * Requires at least: 6.4
+ * Requires at least: 6.6
  * Requires PHP:      7.0
  * PHP tested up to:  8.3
  * Author:            Mailchimp
@@ -96,6 +96,7 @@ function () {
 // Init Admin functions.
 require_once plugin_dir_path( __FILE__ ) . 'includes/class-mailchimp-user-sync-backgroud-process.php';
 require_once plugin_dir_path( __FILE__ ) . 'includes/admin/class-mailchimp-user-sync.php';
+require_once plugin_dir_path( __FILE__ ) . 'includes/admin/class-mailchimp-admin-notices.php';
 require_once plugin_dir_path( __FILE__ ) . 'includes/class-mailchimp-admin.php';
 $admin = new Mailchimp_Admin();
 $admin->init();
diff --git a/phpcs-compat.xml b/phpcs-compat.xml
index 3dbb2557..60a16e5c 100644
--- a/phpcs-compat.xml
+++ b/phpcs-compat.xml
@@ -12,6 +12,6 @@
 	<exclude-pattern>*/node_modules/*</exclude-pattern>
 	<exclude-pattern>*/vendor/*</exclude-pattern>
 
-	<config name="minimum_supported_wp_version" value="6.4"/>
+	<config name="minimum_supported_wp_version" value="6.6"/>
 	<config name="testVersion" value="7.0-"/>
 </ruleset>
diff --git a/phpcs.xml b/phpcs.xml
index 555ec4b2..ea8ca060 100644
--- a/phpcs.xml
+++ b/phpcs.xml
@@ -6,7 +6,7 @@
 
 	<exclude-pattern>*/tests/*</exclude-pattern>
 
-	<config name="minimum_supported_wp_version" value="6.4"/>
+	<config name="minimum_supported_wp_version" value="6.6"/>
 	<config name="testVersion" value="7.0-"/>
 
 	<!-- Exclude the PHPCompatibilityWP ruleset -->
diff --git a/readme.txt b/readme.txt
index 91703902..0838902f 100644
--- a/readme.txt
+++ b/readme.txt
@@ -1,7 +1,7 @@
 === Mailchimp List Subscribe Form ===
 Contributors: Mailchimp
 Tags:         mailchimp, email, newsletter, signup, marketing
-Tested up to: 6.9
+Tested up to: 7.0
 Stable tag:   2.0.1
 License:      GPL-2.0-or-later
 License URI:  https://spdx.org/licenses/GPL-2.0-or-later.html
diff --git a/tests/cypress/support/index.js b/tests/cypress/support/index.js
index 76d9fdaf..3edb7ce6 100644
--- a/tests/cypress/support/index.js
+++ b/tests/cypress/support/index.js
@@ -16,6 +16,18 @@
 import '@10up/cypress-wp-utils';
 import './commands';
 
+Cypress.on('uncaught:exception', (err, runnable) => {
+	/*
+	 * Noticed this "Transition was skipped" error on WP 7.0
+	 */
+	if (err.message.includes('Transition was skipped')) {
+		// returning false here prevents Cypress from failing the test
+		return false;
+	}
+
+	return runnable;
+});
+
 // TODO: Initialize tests from a blank state
 // TODO: Wipe WP data related to a users options
 // TODO: Delete all contacts in a users Mailchimp account