diff --git a/tests/phpunit/tests/media.php b/tests/phpunit/tests/media.php
index 392c039fdb..8fb3cc09d7 100644
--- a/tests/phpunit/tests/media.php
+++ b/tests/phpunit/tests/media.php
@@ -20,6 +20,11 @@ class Tests_Media extends WP_UnitTestCase {
 		$GLOBALS['_wp_additional_image_sizes'] = self::$_sizes;
 	}
 
+	public static function tearDownAfterClass() {
+		wp_delete_post( self::$large_id, true );
+		parent::tearDownAfterClass();
+	}
+
 	function setUp() {
 		parent::setUp();
 		$this->caption = 'A simple caption.';
diff --git a/tests/phpunit/tests/post/thumbnails.php b/tests/phpunit/tests/post/thumbnails.php
index 593bfe712e..05ea281163 100644
--- a/tests/phpunit/tests/post/thumbnails.php
+++ b/tests/phpunit/tests/post/thumbnails.php
@@ -22,6 +22,11 @@ class Tests_Post_Thumbnail_Template extends WP_UnitTestCase {
 		) );
 	}
 
+	public static function tearDownAfterClass() {
+		wp_delete_post( self::$attachment_id, true );
+		parent::tearDownAfterClass();
+	}
+
 	function test_has_post_thumbnail() {
 		$this->assertFalse( has_post_thumbnail( self::$post ) );
 		$this->assertFalse( has_post_thumbnail( self::$post->ID ) );