diff --git a/src/wp-admin/includes/misc.php b/src/wp-admin/includes/misc.php
index 34ced18df5..24cd26d661 100644
--- a/src/wp-admin/includes/misc.php
+++ b/src/wp-admin/includes/misc.php
@@ -1642,3 +1642,131 @@ function wp_check_php_version() {
 
 	return $response;
 }
+
+/**
+ * Creates and returns the markup for an admin notice.
+ *
+ * @since 6.4.0
+ *
+ * @param string $message The message.
+ * @param array  $args {
+ *     Optional. An array of arguments for the admin notice. Default empty array.
+ *
+ *     @type string   $type               Optional. The type of admin notice.
+ *                                        For example, 'error', 'success', 'warning', 'info'.
+ *                                        Default empty string.
+ *     @type bool     $dismissible        Optional. Whether the admin notice is dismissible. Default false.
+ *     @type string   $id                 Optional. The value of the admin notice's ID attribute. Default empty string.
+ *     @type string[] $additional_classes Optional. A string array of class names. Default empty array.
+ *     @type bool     $paragraph_wrap     Optional. Whether to wrap the message in paragraph tags. Default true.
+ * }
+ * @return string The markup for an admin notice.
+ */
+function wp_get_admin_notice( $message, $args = array() ) {
+	$defaults = array(
+		'type'               => '',
+		'dismissible'        => false,
+		'id'                 => '',
+		'additional_classes' => array(),
+		'paragraph_wrap'     => true,
+	);
+
+	$args = wp_parse_args( $args, $defaults );
+
+	/**
+	 * Filters the arguments for an admin notice.
+	 *
+	 * @since 6.4.0
+	 *
+	 * @param array  $args    The arguments for the admin notice.
+	 * @param string $message The message for the admin notice.
+	 */
+	$args    = apply_filters( 'wp_admin_notice_args', $args, $message );
+	$id      = '';
+	$classes = 'notice';
+
+	if ( is_string( $args['id'] ) ) {
+		$trimmed_id = trim( $args['id'] );
+
+		if ( '' !== $trimmed_id ) {
+			$id = 'id="' . $trimmed_id . '" ';
+		}
+	}
+
+	if ( is_string( $args['type'] ) ) {
+		$type = trim( $args['type'] );
+
+		if ( str_contains( $type, ' ' ) ) {
+			_doing_it_wrong(
+				__FUNCTION__,
+				sprintf(
+					/* translators: %s: The "type" key. */
+					__( 'The %s key must be a string without spaces.' ),
+					'<code>type</code>'
+				),
+				'6.4.0'
+			);
+		}
+
+		if ( '' !== $type ) {
+			$classes .= ' notice-' . $type;
+		}
+	}
+
+	if ( true === $args['dismissible'] ) {
+		$classes .= ' is-dismissible';
+	}
+
+	if ( is_array( $args['additional_classes'] ) && ! empty( $args['additional_classes'] ) ) {
+		$classes .= ' ' . implode( ' ', $args['additional_classes'] );
+	}
+
+	if ( false !== $args['paragraph_wrap'] ) {
+		$message = "<p>$message</p>";
+	}
+
+	$markup = sprintf( '<div %1$sclass="%2$s">%3$s</div>', $id, $classes, $message );
+
+	/**
+	 * Filters the markup for an admin notice.
+	 *
+	 * @since 6.4.0
+	 *
+	 * @param string $markup  The HTML markup for the admin notice.
+	 * @param string $message The message for the admin notice.
+	 * @param array  $args    The arguments for the admin notice.
+	 */
+	return apply_filters( 'wp_admin_notice_markup', $markup, $message, $args );
+}
+
+/**
+ * Outputs an admin notice.
+ *
+ * @since 6.4.0
+ *
+ * @param string $message The message to output.
+ * @param array  $args {
+ *     Optional. An array of arguments for the admin notice. Default empty array.
+ *
+ *     @type string   $type               Optional. The type of admin notice.
+ *                                        For example, 'error', 'success', 'warning', 'info'.
+ *                                        Default empty string.
+ *     @type bool     $dismissible        Optional. Whether the admin notice is dismissible. Default false.
+ *     @type string   $id                 Optional. The value of the admin notice's ID attribute. Default empty string.
+ *     @type string[] $additional_classes Optional. A string array of class names. Default empty array.
+ *     @type bool     $paragraph_wrap     Optional. Whether to wrap the message in paragraph tags. Default true.
+ * }
+ */
+function wp_admin_notice( $message, $args = array() ) {
+	/**
+	 * Fires before an admin notice is output.
+	 *
+	 * @since 6.4.0
+	 *
+	 * @param string $message The message for the admin notice.
+	 * @param array  $args    The arguments for the admin notice.
+	 */
+	do_action( 'wp_admin_notice', $message, $args );
+
+	echo wp_kses_post( wp_get_admin_notice( $message, $args ) );
+}
diff --git a/tests/phpunit/tests/admin/wpAdminNotice.php b/tests/phpunit/tests/admin/wpAdminNotice.php
new file mode 100644
index 0000000000..2feca7de7c
--- /dev/null
+++ b/tests/phpunit/tests/admin/wpAdminNotice.php
@@ -0,0 +1,261 @@
+<?php
+
+/**
+ * Tests for `wp_admin_notice()`.
+ *
+ * @group admin
+ *
+ * @covers ::wp_admin_notice
+ */
+class Tests_Admin_WpAdminNotice extends WP_UnitTestCase {
+
+	/**
+	 * Tests that `wp_admin_notice()` outputs the expected admin notice markup.
+	 *
+	 * @ticket 57791
+	 *
+	 * @dataProvider data_should_output_admin_notice
+	 *
+	 * @param string $message  The message to output.
+	 * @param array  $args     Arguments for the admin notice.
+	 * @param string $expected The expected admin notice markup.
+	 */
+	public function test_should_output_admin_notice( $message, $args, $expected ) {
+		ob_start();
+		wp_admin_notice( $message, $args );
+		$actual = ob_get_clean();
+
+		$this->assertSame( $expected, $actual );
+	}
+
+	/**
+	 * Data provider.
+	 *
+	 * @return array[]
+	 */
+	public function data_should_output_admin_notice() {
+		return array(
+			'defaults'                                  => array(
+				'message'  => 'A notice with defaults.',
+				'args'     => array(),
+				'expected' => '<div class="notice"><p>A notice with defaults.</p></div>',
+			),
+			'an empty message (used for templates)'     => array(
+				'message'  => '',
+				'args'     => array(
+					'type'               => 'error',
+					'dismissible'        => true,
+					'id'                 => 'message',
+					'additional_classes' => array( 'inline', 'hidden' ),
+				),
+				'expected' => '<div id="message" class="notice notice-error is-dismissible inline hidden"><p></p></div>',
+			),
+			'an empty message (used for templates) without paragraph wrapping' => array(
+				'message'  => '',
+				'args'     => array(
+					'type'               => 'error',
+					'dismissible'        => true,
+					'id'                 => 'message',
+					'additional_classes' => array( 'inline', 'hidden' ),
+					'paragraph_wrap'     => false,
+				),
+				'expected' => '<div id="message" class="notice notice-error is-dismissible inline hidden"></div>',
+			),
+			'an "error" notice'                         => array(
+				'message'  => 'An "error" notice.',
+				'args'     => array(
+					'type' => 'error',
+				),
+				'expected' => '<div class="notice notice-error"><p>An "error" notice.</p></div>',
+			),
+			'a "success" notice'                        => array(
+				'message'  => 'A "success" notice.',
+				'args'     => array(
+					'type' => 'success',
+				),
+				'expected' => '<div class="notice notice-success"><p>A "success" notice.</p></div>',
+			),
+			'a "warning" notice'                        => array(
+				'message'  => 'A "warning" notice.',
+				'args'     => array(
+					'type' => 'warning',
+				),
+				'expected' => '<div class="notice notice-warning"><p>A "warning" notice.</p></div>',
+			),
+			'an "info" notice'                          => array(
+				'message'  => 'An "info" notice.',
+				'args'     => array(
+					'type' => 'info',
+				),
+				'expected' => '<div class="notice notice-info"><p>An "info" notice.</p></div>',
+			),
+			'a type that already starts with "notice-"' => array(
+				'message'  => 'A type that already starts with "notice-".',
+				'args'     => array(
+					'type' => 'notice-info',
+				),
+				'expected' => '<div class="notice notice-notice-info"><p>A type that already starts with "notice-".</p></div>',
+			),
+			'a dismissible notice'                      => array(
+				'message'  => 'A dismissible notice.',
+				'args'     => array(
+					'dismissible' => true,
+				),
+				'expected' => '<div class="notice is-dismissible"><p>A dismissible notice.</p></div>',
+			),
+			'no type and an ID'                         => array(
+				'message'  => 'A notice with an ID.',
+				'args'     => array(
+					'id' => 'message',
+				),
+				'expected' => '<div id="message" class="notice"><p>A notice with an ID.</p></div>',
+			),
+			'a type and an ID'                          => array(
+				'message'  => 'A warning notice with an ID.',
+				'args'     => array(
+					'type' => 'warning',
+					'id'   => 'message',
+				),
+				'expected' => '<div id="message" class="notice notice-warning"><p>A warning notice with an ID.</p></div>',
+			),
+			'no type and additional classes'            => array(
+				'message'  => 'A notice with additional classes.',
+				'args'     => array(
+					'additional_classes' => array( 'error', 'notice-alt' ),
+				),
+				'expected' => '<div class="notice error notice-alt"><p>A notice with additional classes.</p></div>',
+			),
+			'a type and additional classes'             => array(
+				'message'  => 'A warning notice with additional classes.',
+				'args'     => array(
+					'type'               => 'warning',
+					'additional_classes' => array( 'error', 'notice-alt' ),
+				),
+				'expected' => '<div class="notice notice-warning error notice-alt"><p>A warning notice with additional classes.</p></div>',
+			),
+			'a dismissible notice with a type and additional classes' => array(
+				'message'  => 'A dismissible warning notice with a type and additional classes.',
+				'args'     => array(
+					'type'               => 'warning',
+					'dismissible'        => true,
+					'additional_classes' => array( 'error', 'notice-alt' ),
+				),
+				'expected' => '<div class="notice notice-warning is-dismissible error notice-alt"><p>A dismissible warning notice with a type and additional classes.</p></div>',
+			),
+			'a notice without paragraph wrapping'       => array(
+				'message'  => '<span>A notice without paragraph wrapping.</span>',
+				'args'     => array(
+					'paragraph_wrap' => false,
+				),
+				'expected' => '<div class="notice"><span>A notice without paragraph wrapping.</span></div>',
+			),
+			'an unsafe type'                            => array(
+				'message'  => 'A notice with an unsafe type.',
+				'args'     => array(
+					'type' => '"><script>alert("Howdy,admin!");</script>',
+				),
+				'expected' => '<div class="notice notice-">alert("Howdy,admin!");"&gt;<p>A notice with an unsafe type.</p></div>',
+			),
+			'an unsafe ID'                              => array(
+				'message'  => 'A notice with an unsafe ID.',
+				'args'     => array(
+					'id' => '"><script>alert( "Howdy, admin!" );</script> <div class="notice',
+				),
+				'expected' => '<div id="">alert( "Howdy, admin!" ); <div class="notice"><p>A notice with an unsafe ID.</p></div>',
+			),
+			'unsafe additional classes'                 => array(
+				'message'  => 'A notice with unsafe additional classes.',
+				'args'     => array(
+					'additional_classes' => array( '"><script>alert( "Howdy, admin!" );</script> <div class="notice' ),
+				),
+				'expected' => '<div class="notice ">alert( "Howdy, admin!" ); <div class="notice"><p>A notice with unsafe additional classes.</p></div>',
+			),
+			'a type that is not a string'               => array(
+				'message'  => 'A notice with a type that is not a string.',
+				'args'     => array(
+					'type' => array(),
+				),
+				'expected' => '<div class="notice"><p>A notice with a type that is not a string.</p></div>',
+			),
+			'a type with only empty space'              => array(
+				'message'  => 'A notice with a type with only empty space.',
+				'args'     => array(
+					'type' => " \t\r\n",
+				),
+				'expected' => '<div class="notice"><p>A notice with a type with only empty space.</p></div>',
+			),
+			'an ID that is not a string'                => array(
+				'message'  => 'A notice with an ID that is not a string.',
+				'args'     => array(
+					'id' => array( 'message' ),
+				),
+				'expected' => '<div class="notice"><p>A notice with an ID that is not a string.</p></div>',
+			),
+			'an ID with only empty space'               => array(
+				'message'  => 'A notice with an ID with only empty space.',
+				'args'     => array(
+					'id' => " \t\r\n",
+				),
+				'expected' => '<div class="notice"><p>A notice with an ID with only empty space.</p></div>',
+			),
+			'dismissible as a truthy value rather than (bool) true' => array(
+				'message'  => 'A notice with dismissible as a truthy value rather than (bool) true.',
+				'args'     => array(
+					'dismissible' => 1,
+				),
+				'expected' => '<div class="notice"><p>A notice with dismissible as a truthy value rather than (bool) true.</p></div>',
+			),
+			'additional classes that are not an array'  => array(
+				'message'  => 'A notice with additional classes that are not an array.',
+				'args'     => array(
+					'additional_classes' => 'class-1 class-2 class-3',
+				),
+				'expected' => '<div class="notice"><p>A notice with additional classes that are not an array.</p></div>',
+			),
+			'paragraph wrapping as a falsy value rather than (bool) false' => array(
+				'message'  => 'A notice with paragraph wrapping as a falsy value rather than (bool) false.',
+				'args'     => array(
+					'paragraph_wrap' => 0,
+				),
+				'expected' => '<div class="notice"><p>A notice with paragraph wrapping as a falsy value rather than (bool) false.</p></div>',
+			),
+		);
+	}
+
+	/**
+	 * Tests that `_doing_it_wrong()` is thrown when a 'type' containing spaces is passed.
+	 *
+	 * @ticket 57791
+	 *
+	 * @expectedIncorrectUsage wp_get_admin_notice
+	 */
+	public function test_should_throw_doing_it_wrong_with_a_type_containing_spaces() {
+		ob_start();
+		wp_admin_notice(
+			'A type containing spaces.',
+			array( 'type' => 'first second third fourth' )
+		);
+		$actual = ob_get_clean();
+
+		$this->assertSame(
+			'<div class="notice notice-first second third fourth"><p>A type containing spaces.</p></div>',
+			$actual
+		);
+	}
+
+	/**
+	 * Tests that `wp_admin_notice()` fires the 'wp_admin_notice' action.
+	 *
+	 * @ticket 57791
+	 */
+	public function test_should_fire_wp_admin_notice_action() {
+		$action = new MockAction();
+		add_action( 'wp_admin_notice', array( $action, 'action' ) );
+
+		ob_start();
+		wp_admin_notice( 'A notice.', array( 'type' => 'success' ) );
+		ob_end_clean();
+
+		$this->assertSame( 1, $action->get_call_count() );
+	}
+}
diff --git a/tests/phpunit/tests/admin/wpGetAdminNotice.php b/tests/phpunit/tests/admin/wpGetAdminNotice.php
new file mode 100644
index 0000000000..b5ba311338
--- /dev/null
+++ b/tests/phpunit/tests/admin/wpGetAdminNotice.php
@@ -0,0 +1,268 @@
+<?php
+
+/**
+ * Tests for `wp_get_admin_notice()`.
+ *
+ * @group admin
+ *
+ * @covers ::wp_get_admin_notice
+ */
+class Tests_Admin_WpGetAdminNotice extends WP_UnitTestCase {
+
+	/**
+	 * Tests that `wp_get_admin_notice()` returns the expected admin notice markup.
+	 *
+	 * @ticket 57791
+	 *
+	 * @dataProvider data_should_return_admin_notice
+	 *
+	 * @param string $message  The message.
+	 * @param array  $args     Arguments for the admin notice.
+	 * @param string $expected The expected admin notice markup.
+	 */
+	public function test_should_return_admin_notice( $message, $args, $expected ) {
+		$this->assertSame( $expected, wp_get_admin_notice( $message, $args ) );
+	}
+
+	/**
+	 * Data provider.
+	 *
+	 * @return array[]
+	 */
+	public function data_should_return_admin_notice() {
+		return array(
+			'defaults'                                  => array(
+				'message'  => 'A notice with defaults.',
+				'args'     => array(),
+				'expected' => '<div class="notice"><p>A notice with defaults.</p></div>',
+			),
+			'an empty message (used for templates)'     => array(
+				'message'  => '',
+				'args'     => array(
+					'type'               => 'error',
+					'dismissible'        => true,
+					'id'                 => 'message',
+					'additional_classes' => array( 'inline', 'hidden' ),
+				),
+				'expected' => '<div id="message" class="notice notice-error is-dismissible inline hidden"><p></p></div>',
+			),
+			'an empty message (used for templates) without paragraph wrapping' => array(
+				'message'  => '',
+				'args'     => array(
+					'type'               => 'error',
+					'dismissible'        => true,
+					'id'                 => 'message',
+					'additional_classes' => array( 'inline', 'hidden' ),
+					'paragraph_wrap'     => false,
+				),
+				'expected' => '<div id="message" class="notice notice-error is-dismissible inline hidden"></div>',
+			),
+			'an "error" notice'                         => array(
+				'message'  => 'An "error" notice.',
+				'args'     => array(
+					'type' => 'error',
+				),
+				'expected' => '<div class="notice notice-error"><p>An "error" notice.</p></div>',
+			),
+			'a "success" notice'                        => array(
+				'message'  => 'A "success" notice.',
+				'args'     => array(
+					'type' => 'success',
+				),
+				'expected' => '<div class="notice notice-success"><p>A "success" notice.</p></div>',
+			),
+			'a "warning" notice'                        => array(
+				'message'  => 'A "warning" notice.',
+				'args'     => array(
+					'type' => 'warning',
+				),
+				'expected' => '<div class="notice notice-warning"><p>A "warning" notice.</p></div>',
+			),
+			'an "info" notice'                          => array(
+				'message'  => 'An "info" notice.',
+				'args'     => array(
+					'type' => 'info',
+				),
+				'expected' => '<div class="notice notice-info"><p>An "info" notice.</p></div>',
+			),
+			'a type that already starts with "notice-"' => array(
+				'message'  => 'A type that already starts with "notice-".',
+				'args'     => array(
+					'type' => 'notice-info',
+				),
+				'expected' => '<div class="notice notice-notice-info"><p>A type that already starts with "notice-".</p></div>',
+			),
+			'a dismissible notice'                      => array(
+				'message'  => 'A dismissible notice.',
+				'args'     => array(
+					'dismissible' => true,
+				),
+				'expected' => '<div class="notice is-dismissible"><p>A dismissible notice.</p></div>',
+			),
+			'no type and an ID'                         => array(
+				'message'  => 'A notice with an ID.',
+				'args'     => array(
+					'id' => 'message',
+				),
+				'expected' => '<div id="message" class="notice"><p>A notice with an ID.</p></div>',
+			),
+			'a type and an ID'                          => array(
+				'message'  => 'A warning notice with an ID.',
+				'args'     => array(
+					'type' => 'warning',
+					'id'   => 'message',
+				),
+				'expected' => '<div id="message" class="notice notice-warning"><p>A warning notice with an ID.</p></div>',
+			),
+			'no type and additional classes'            => array(
+				'message'  => 'A notice with additional classes.',
+				'args'     => array(
+					'additional_classes' => array( 'error', 'notice-alt' ),
+				),
+				'expected' => '<div class="notice error notice-alt"><p>A notice with additional classes.</p></div>',
+			),
+			'a type and additional classes'             => array(
+				'message'  => 'A warning notice with additional classes.',
+				'args'     => array(
+					'type'               => 'warning',
+					'additional_classes' => array( 'error', 'notice-alt' ),
+				),
+				'expected' => '<div class="notice notice-warning error notice-alt"><p>A warning notice with additional classes.</p></div>',
+			),
+			'a dismissible notice with a type and additional classes' => array(
+				'message'  => 'A dismissible warning notice with a type and additional classes.',
+				'args'     => array(
+					'type'               => 'warning',
+					'dismissible'        => true,
+					'additional_classes' => array( 'error', 'notice-alt' ),
+				),
+				'expected' => '<div class="notice notice-warning is-dismissible error notice-alt"><p>A dismissible warning notice with a type and additional classes.</p></div>',
+			),
+			'a notice without paragraph wrapping'       => array(
+				'message'  => '<span>A notice without paragraph wrapping.</span>',
+				'args'     => array(
+					'paragraph_wrap' => false,
+				),
+				'expected' => '<div class="notice"><span>A notice without paragraph wrapping.</span></div>',
+			),
+			'an unsafe type'                            => array(
+				'message'  => 'A notice with an unsafe type.',
+				'args'     => array(
+					'type' => '"><script>alert("Howdy,admin!");</script>',
+				),
+				'expected' => '<div class="notice notice-"><script>alert("Howdy,admin!");</script>"><p>A notice with an unsafe type.</p></div>',
+			),
+			'an unsafe ID'                              => array(
+				'message'  => 'A notice with an unsafe ID.',
+				'args'     => array(
+					'id' => '"><script>alert( "Howdy, admin!" );</script> <div class="notice',
+				),
+				'expected' => '<div id=""><script>alert( "Howdy, admin!" );</script> <div class="notice" class="notice"><p>A notice with an unsafe ID.</p></div>',
+			),
+			'unsafe additional classes'                 => array(
+				'message'  => 'A notice with unsafe additional classes.',
+				'args'     => array(
+					'additional_classes' => array( '"><script>alert( "Howdy, admin!" );</script> <div class="notice' ),
+				),
+				'expected' => '<div class="notice "><script>alert( "Howdy, admin!" );</script> <div class="notice"><p>A notice with unsafe additional classes.</p></div>',
+			),
+			'a type that is not a string'               => array(
+				'message'  => 'A notice with a type that is not a string.',
+				'args'     => array(
+					'type' => array(),
+				),
+				'expected' => '<div class="notice"><p>A notice with a type that is not a string.</p></div>',
+			),
+			'a type with only empty space'              => array(
+				'message'  => 'A notice with a type with only empty space.',
+				'args'     => array(
+					'type' => " \t\r\n",
+				),
+				'expected' => '<div class="notice"><p>A notice with a type with only empty space.</p></div>',
+			),
+			'an ID that is not a string'                => array(
+				'message'  => 'A notice with an ID that is not a string.',
+				'args'     => array(
+					'id' => array( 'message' ),
+				),
+				'expected' => '<div class="notice"><p>A notice with an ID that is not a string.</p></div>',
+			),
+			'an ID with only empty space'               => array(
+				'message'  => 'A notice with an ID with only empty space.',
+				'args'     => array(
+					'id' => " \t\r\n",
+				),
+				'expected' => '<div class="notice"><p>A notice with an ID with only empty space.</p></div>',
+			),
+			'dismissible as a truthy value rather than (bool) true' => array(
+				'message'  => 'A notice with dismissible as a truthy value rather than (bool) true.',
+				'args'     => array(
+					'dismissible' => 1,
+				),
+				'expected' => '<div class="notice"><p>A notice with dismissible as a truthy value rather than (bool) true.</p></div>',
+			),
+			'additional classes that are not an array'  => array(
+				'message'  => 'A notice with additional classes that are not an array.',
+				'args'     => array(
+					'additional_classes' => 'class-1 class-2 class-3',
+				),
+				'expected' => '<div class="notice"><p>A notice with additional classes that are not an array.</p></div>',
+			),
+			'paragraph wrapping as a falsy value rather than (bool) false' => array(
+				'message'  => 'A notice with paragraph wrapping as a falsy value rather than (bool) false.',
+				'args'     => array(
+					'paragraph_wrap' => 0,
+				),
+				'expected' => '<div class="notice"><p>A notice with paragraph wrapping as a falsy value rather than (bool) false.</p></div>',
+			),
+		);
+	}
+
+	/**
+	 * Tests that `wp_get_admin_notice()` throws a `_doing_it_wrong()` when
+	 * a 'type' containing spaces is passed.
+	 *
+	 * @ticket 57791
+	 *
+	 * @expectedIncorrectUsage wp_get_admin_notice
+	 */
+	public function test_should_throw_doing_it_wrong_with_a_type_containing_spaces() {
+		$this->assertSame(
+			'<div class="notice notice-first second third fourth"><p>A type containing spaces.</p></div>',
+			wp_get_admin_notice(
+				'A type containing spaces.',
+				array( 'type' => 'first second third fourth' )
+			)
+		);
+	}
+
+	/**
+	 * Tests that `wp_get_admin_notice()` applies filters.
+	 *
+	 * @ticket 57791
+	 *
+	 * @dataProvider data_should_apply_filters
+	 *
+	 * @param string $hook_name The name of the filter hook.
+	 */
+	public function test_should_apply_filters( $hook_name ) {
+		$filter = new MockAction();
+		add_filter( $hook_name, array( $filter, 'filter' ) );
+
+		wp_get_admin_notice( 'A notice.', array( 'type' => 'success' ) );
+
+		$this->assertSame( 1, $filter->get_call_count() );
+	}
+
+	/**
+	 * Data provider.
+	 *
+	 * @return array[]
+	 */
+	public function data_should_apply_filters() {
+		return array(
+			'wp_admin_notice_args'   => array( 'hook_name' => 'wp_admin_notice_args' ),
+			'wp_admin_notice_markup' => array( 'hook_name' => 'wp_admin_notice_markup' ),
+		);
+	}
+}