Index: src/wp-includes/script-loader.php
===================================================================
--- src/wp-includes/script-loader.php	(revision 46167)
+++ src/wp-includes/script-loader.php	(working copy)
@@ -880,10 +880,6 @@
 		)
 	);
 
-	$scripts->add( 'wp-sanitize', "/wp-includes/js/wp-sanitize$suffix.js", array(), false, 1 );
-
-	$scripts->add( 'wp-a11y', "/wp-includes/js/wp-a11y$suffix.js", array( 'jquery', 'wp-sanitize' ), false, 1 );
-
 	$scripts->add( 'sack', "/wp-includes/js/tw-sack$suffix.js", array(), '1.6.1', 1 );
 
 	$scripts->add( 'quicktags', "/wp-includes/js/quicktags$suffix.js", array(), false, 1 );
Index: tests/phpunit/tests/dependencies/scripts.php
===================================================================
--- tests/phpunit/tests/dependencies/scripts.php	(revision 46167)
+++ tests/phpunit/tests/dependencies/scripts.php	(working copy)
@@ -748,10 +748,8 @@
 		wp_enqueue_script( $handle, '/customize-dependency.js', array( 'customize-controls' ), null );
 		wp_add_inline_script( $handle, 'tryCustomizeDependency()' );
 
-		// Open a buffer to get the output of `wp_print_scripts`.
-		ob_start();
 		wp_print_scripts();
-		$print_scripts = ob_get_clean();
+		$print_scripts = get_echo( '_print_scripts' );
 
 		$tail = substr( $print_scripts, strrpos( $print_scripts, "<script type='text/javascript' src='/customize-dependency.js'>" ) );
 		$this->assertEquals( $expected_tail, $tail );