diff --git a/tests/phpunit/tests/comment/slashes.php b/tests/phpunit/tests/comment/slashes.php
index beb998e11c..ed6f2834f7 100644
--- a/tests/phpunit/tests/comment/slashes.php
+++ b/tests/phpunit/tests/comment/slashes.php
@@ -7,10 +7,12 @@
  */
 class Tests_Comment_Slashes extends WP_UnitTestCase {
 	protected static $author_id;
+	protected static $post_id;
 
 	public static function wpSetUpBeforeClass( $factory ) {
 		// We need an admin user to bypass comment flood protection.
 		self::$author_id = $factory->user->create( array( 'role' => 'administrator' ) );
+		self::$post_id   = $factory->post->create();
 	}
 
 	function setUp() {
@@ -33,7 +35,7 @@ class Tests_Comment_Slashes extends WP_UnitTestCase {
 	 * Tests the extended model function that expects slashed data.
 	 */
 	function test_wp_new_comment() {
-		$post_id = self::factory()->post->create();
+		$post_id = self::$post_id;
 
 		// Not testing comment_author_email or comment_author_url
 		// as slashes are not permitted in that data.
@@ -72,7 +74,7 @@ class Tests_Comment_Slashes extends WP_UnitTestCase {
 	 * Tests the controller function that expects slashed data.
 	 */
 	function test_edit_comment() {
-		$post_id    = self::factory()->post->create();
+		$post_id    = self::$post_id;
 		$comment_id = self::factory()->comment->create(
 			array(
 				'comment_post_ID' => $post_id,
@@ -118,7 +120,7 @@ class Tests_Comment_Slashes extends WP_UnitTestCase {
 	 * Tests the model function that expects slashed data.
 	 */
 	function test_wp_insert_comment() {
-		$post_id = self::factory()->post->create();
+		$post_id = self::$post_id;
 
 		$comment_id = wp_insert_comment(
 			array(
@@ -149,7 +151,7 @@ class Tests_Comment_Slashes extends WP_UnitTestCase {
 	 * Tests the model function that expects slashed data.
 	 */
 	function test_wp_update_comment() {
-		$post_id    = self::factory()->post->create();
+		$post_id    = self::$post_id;
 		$comment_id = self::factory()->comment->create(
 			array(
 				'comment_post_ID' => $post_id,
diff --git a/tests/phpunit/tests/meta/slashes.php b/tests/phpunit/tests/meta/slashes.php
index 125cbaaae4..6ef581ba2d 100644
--- a/tests/phpunit/tests/meta/slashes.php
+++ b/tests/phpunit/tests/meta/slashes.php
@@ -9,11 +9,13 @@ class Tests_Meta_Slashes extends WP_UnitTestCase {
 	protected static $editor_id;
 	protected static $post_id;
 	protected static $comment_id;
+	protected static $user_id;
 
 	public static function wpSetUpBeforeClass( $factory ) {
 		self::$editor_id  = $factory->user->create( array( 'role' => 'editor' ) );
 		self::$post_id    = $factory->post->create();
 		self::$comment_id = $factory->comment->create( array( 'comment_post_ID' => self::$post_id ) );
+		self::$user_id    = $factory->user->create();
 	}
 
 	function setUp() {
@@ -34,7 +36,7 @@ class Tests_Meta_Slashes extends WP_UnitTestCase {
 	 * Tests the controller function that expects slashed data.
 	 */
 	function test_edit_post() {
-		$post_id = self::factory()->post->create();
+		$post_id = self::$post_id;
 
 		if ( function_exists( 'wp_add_post_meta' ) ) {
 			$meta_1 = wp_add_post_meta( $post_id, 'slash_test_1', 'foo' );
@@ -111,7 +113,7 @@ class Tests_Meta_Slashes extends WP_UnitTestCase {
 	 * Tests the legacy model function that expects slashed data.
 	 */
 	function test_add_post_meta() {
-		$post_id = self::factory()->post->create();
+		$post_id = self::$post_id;
 
 		add_post_meta( $post_id, 'slash_test_1', addslashes( $this->slash_1 ) );
 		add_post_meta( $post_id, 'slash_test_2', addslashes( $this->slash_3 ) );
@@ -126,7 +128,7 @@ class Tests_Meta_Slashes extends WP_UnitTestCase {
 	 * Tests the legacy model function that expects slashed data.
 	 */
 	function test_update_post_meta() {
-		$post_id = self::factory()->post->create();
+		$post_id = self::$post_id;
 
 		update_post_meta( $post_id, 'slash_test_1', addslashes( $this->slash_1 ) );
 		update_post_meta( $post_id, 'slash_test_2', addslashes( $this->slash_3 ) );
@@ -191,7 +193,7 @@ class Tests_Meta_Slashes extends WP_UnitTestCase {
 	 * Tests the model function that expects slashed data.
 	 */
 	function test_add_user_meta() {
-		$user_id = self::factory()->user->create();
+		$user_id = self::$user_id;
 
 		add_user_meta( $user_id, 'slash_test_1', $this->slash_1 );
 		add_user_meta( $user_id, 'slash_test_2', $this->slash_3 );
@@ -214,7 +216,7 @@ class Tests_Meta_Slashes extends WP_UnitTestCase {
 	 * Tests the model function that expects slashed data.
 	 */
 	function test_update_user_meta() {
-		$user_id = self::factory()->user->create();
+		$user_id = self::$user_id;
 
 		add_user_meta( $user_id, 'slash_test_1', 'foo' );
 		add_user_meta( $user_id, 'slash_test_2', 'foo' );
diff --git a/tests/phpunit/tests/post/slashes.php b/tests/phpunit/tests/post/slashes.php
index 25a0240576..d2622c4d80 100644
--- a/tests/phpunit/tests/post/slashes.php
+++ b/tests/phpunit/tests/post/slashes.php
@@ -7,9 +7,11 @@
  */
 class Tests_Post_Slashes extends WP_UnitTestCase {
 	protected static $author_id;
+	protected static $post_id;
 
 	public static function wpSetUpBeforeClass( $factory ) {
 		self::$author_id = $factory->user->create( array( 'role' => 'editor' ) );
+		self::$post_id   = $factory->post->create();
 	}
 
 	function setUp() {
@@ -32,7 +34,7 @@ class Tests_Post_Slashes extends WP_UnitTestCase {
 	 * Tests the controller function that expects slashed data.
 	 */
 	function test_edit_post() {
-		$post_id = self::factory()->post->create();
+		$post_id = self::$post_id;
 
 		$_POST               = array();
 		$_POST['post_ID']    = $post_id;
@@ -105,7 +107,7 @@ class Tests_Post_Slashes extends WP_UnitTestCase {
 	 * Tests the model function that expects slashed data.
 	 */
 	function test_wp_update_post() {
-		$post_id = self::factory()->post->create();
+		$post_id = self::$post_id;
 
 		wp_update_post(
 			array(
diff --git a/tests/phpunit/tests/user/slashes.php b/tests/phpunit/tests/user/slashes.php
index ee54b5efc3..5e2722ae0b 100644
--- a/tests/phpunit/tests/user/slashes.php
+++ b/tests/phpunit/tests/user/slashes.php
@@ -7,9 +7,11 @@
  */
 class Tests_User_Slashes extends WP_UnitTestCase {
 	protected static $author_id;
+	protected static $user_id;
 
 	public static function wpSetUpBeforeClass( $factory ) {
 		self::$author_id = $factory->user->create( array( 'role' => 'administrator' ) );
+		self::$user_id   = $factory->user->create();
 	}
 
 	function setUp() {
@@ -87,7 +89,7 @@ class Tests_User_Slashes extends WP_UnitTestCase {
 	 * Tests the controller function that expects slashed data.
 	 */
 	function test_edit_user() {
-		$user_id = self::factory()->user->create();
+		$user_id = self::$user_id;
 
 		$_POST                 = array();
 		$_GET                  = array();
@@ -185,7 +187,7 @@ class Tests_User_Slashes extends WP_UnitTestCase {
 	 * Tests the model function that expects slashed data.
 	 */
 	function test_wp_update_user() {
-		$user_id = self::factory()->user->create();
+		$user_id = self::$user_id;
 		$user_id = wp_update_user(
 			array(
 				'ID'           => $user_id,