diff --git a/tests/phpunit/tests/multisite.php b/tests/phpunit/tests/multisite.php
index deb45b4fe4..22beb7f53c 100644
--- a/tests/phpunit/tests/multisite.php
+++ b/tests/phpunit/tests/multisite.php
@@ -8,19 +8,6 @@ if ( is_multisite() ) :
 	 * @group multisite
 	 */
 	class Tests_Multisite extends WP_UnitTestCase {
-		protected $suppress = false;
-
-		function set_up() {
-			global $wpdb;
-			parent::set_up();
-			$this->suppress = $wpdb->suppress_errors();
-		}
-
-		function tear_down() {
-			global $wpdb;
-			$wpdb->suppress_errors( $this->suppress );
-			parent::tear_down();
-		}
 
 		function test_wpmu_log_new_registrations() {
 			global $wpdb;
diff --git a/tests/phpunit/tests/multisite/cleanDirsizeCache.php b/tests/phpunit/tests/multisite/cleanDirsizeCache.php
index 958908f468..b190acd226 100644
--- a/tests/phpunit/tests/multisite/cleanDirsizeCache.php
+++ b/tests/phpunit/tests/multisite/cleanDirsizeCache.php
@@ -9,19 +9,6 @@ if ( is_multisite() ) :
 	 * @group multisite
 	 */
 	class Tests_Multisite_CleanDirsizeCache extends WP_UnitTestCase {
-		protected $suppress = false;
-
-		function set_up() {
-			global $wpdb;
-			parent::set_up();
-			$this->suppress = $wpdb->suppress_errors();
-		}
-
-		function tear_down() {
-			global $wpdb;
-			$wpdb->suppress_errors( $this->suppress );
-			parent::tear_down();
-		}
 
 		/**
 		 * Test whether dirsize_cache values are used correctly with a more complex dirsize cache mock.
diff --git a/tests/phpunit/tests/multisite/getSpaceAllowed.php b/tests/phpunit/tests/multisite/getSpaceAllowed.php
index 97b09ab00c..5e87fc0087 100644
--- a/tests/phpunit/tests/multisite/getSpaceAllowed.php
+++ b/tests/phpunit/tests/multisite/getSpaceAllowed.php
@@ -8,20 +8,6 @@ if ( is_multisite() ) :
 	 * @group multisite
 	 */
 	class Tests_Multisite_GetSpaceAllowed extends WP_UnitTestCase {
-		protected $suppress = false;
-
-		public function set_up() {
-			global $wpdb;
-			parent::set_up();
-			$this->suppress = $wpdb->suppress_errors();
-		}
-
-		public function tear_down() {
-			global $wpdb;
-
-			$wpdb->suppress_errors( $this->suppress );
-			parent::tear_down();
-		}
 
 		/**
 		 * When no option exists for the site or the network, a fallback of
diff --git a/tests/phpunit/tests/multisite/getSpaceUsed.php b/tests/phpunit/tests/multisite/getSpaceUsed.php
index 7bad089572..d243fc8efa 100644
--- a/tests/phpunit/tests/multisite/getSpaceUsed.php
+++ b/tests/phpunit/tests/multisite/getSpaceUsed.php
@@ -7,19 +7,6 @@ if ( is_multisite() ) :
 	 * @covers ::get_space_used
 	 */
 	class Tests_Multisite_GetSpaceUsed extends WP_UnitTestCase {
-		protected $suppress = false;
-
-		function set_up() {
-			global $wpdb;
-			parent::set_up();
-			$this->suppress = $wpdb->suppress_errors();
-		}
-
-		function tear_down() {
-			global $wpdb;
-			$wpdb->suppress_errors( $this->suppress );
-			parent::tear_down();
-		}
 
 		function test_get_space_used_switched_site() {
 			$blog_id = self::factory()->blog->create();
diff --git a/tests/phpunit/tests/multisite/isUploadSpaceAvailable.php b/tests/phpunit/tests/multisite/isUploadSpaceAvailable.php
index 796bf0f736..bc983d5d46 100644
--- a/tests/phpunit/tests/multisite/isUploadSpaceAvailable.php
+++ b/tests/phpunit/tests/multisite/isUploadSpaceAvailable.php
@@ -11,23 +11,12 @@ if ( is_multisite() ) :
 	 * @group multisite
 	 */
 	class Tests_Multisite_IsUploadSpaceAvailable extends WP_UnitTestCase {
-		protected $suppress = false;
 
 		public function set_up() {
-			global $wpdb;
 			parent::set_up();
-			$this->suppress = $wpdb->suppress_errors();
-
 			update_site_option( 'upload_space_check_disabled', false );
 		}
 
-		public function tear_down() {
-			global $wpdb;
-
-			$wpdb->suppress_errors( $this->suppress );
-			parent::tear_down();
-		}
-
 		/**
 		 * A default of 100MB is used when no `blog_upload_space` option
 		 * exists at the site or network level.
diff --git a/tests/phpunit/tests/multisite/msFilesRewriting.php b/tests/phpunit/tests/multisite/msFilesRewriting.php
index 050ae44bb9..4964d7ed8a 100644
--- a/tests/phpunit/tests/multisite/msFilesRewriting.php
+++ b/tests/phpunit/tests/multisite/msFilesRewriting.php
@@ -12,25 +12,13 @@ if ( is_multisite() ) :
 	 * @group multisite
 	 */
 	class Tests_Multisite_msFilesRewriting extends WP_UnitTestCase {
-		protected $suppress = false;
 
 		function set_up() {
-			global $wpdb;
 			parent::set_up();
-			$this->suppress = $wpdb->suppress_errors();
-
 			update_site_option( 'ms_files_rewriting', 1 );
 			ms_upload_constants();
 		}
 
-		function tear_down() {
-			global $wpdb;
-
-			$wpdb->suppress_errors( $this->suppress );
-
-			parent::tear_down();
-		}
-
 		function test_switch_upload_dir() {
 			$this->assertTrue( is_main_site() );
 
diff --git a/tests/phpunit/tests/multisite/network.php b/tests/phpunit/tests/multisite/network.php
index 656db4fbb1..bad6626b56 100644
--- a/tests/phpunit/tests/multisite/network.php
+++ b/tests/phpunit/tests/multisite/network.php
@@ -10,20 +10,12 @@ if ( is_multisite() ) :
 	 */
 	class Tests_Multisite_Network extends WP_UnitTestCase {
 		protected $plugin_hook_count = 0;
-		protected $suppress          = false;
 
 		protected static $different_network_id;
 		protected static $different_site_ids = array();
 
-		function set_up() {
-			global $wpdb;
-			parent::set_up();
-			$this->suppress = $wpdb->suppress_errors();
-		}
-
 		function tear_down() {
-			global $wpdb, $current_site;
-			$wpdb->suppress_errors( $this->suppress );
+			global $current_site;
 			$current_site->id = 1;
 			parent::tear_down();
 		}
@@ -590,9 +582,13 @@ if ( is_multisite() ) :
 		 * @ticket 38699
 		 */
 		public function test_wpmu_create_blog_updates_correct_network_site_count() {
+			global $wpdb;
+
 			$original_count = get_blog_count( self::$different_network_id );
 
-			$site_id = wpmu_create_blog( 'example.org', '/', '', 1, array(), self::$different_network_id );
+			$suppress = $wpdb->suppress_errors();
+			$site_id  = wpmu_create_blog( 'example.org', '/', '', 1, array(), self::$different_network_id );
+			$wpdb->suppress_errors( $suppress );
 
 			$result = get_blog_count( self::$different_network_id );
 
diff --git a/tests/phpunit/tests/multisite/uploadIsUserOverQuota.php b/tests/phpunit/tests/multisite/uploadIsUserOverQuota.php
index 2de3f6b472..5b08569091 100644
--- a/tests/phpunit/tests/multisite/uploadIsUserOverQuota.php
+++ b/tests/phpunit/tests/multisite/uploadIsUserOverQuota.php
@@ -11,22 +11,12 @@ if ( is_multisite() ) :
 	 * @group multisite
 	 */
 	class Tests_Multisite_UploadIsUserOverQuota extends WP_UnitTestCase {
-		protected $suppress = false;
 
 		public function set_up() {
-			global $wpdb;
 			parent::set_up();
-			$this->suppress = $wpdb->suppress_errors();
-
 			update_site_option( 'upload_space_check_disabled', false );
 		}
 
-		public function tear_down() {
-			global $wpdb;
-			$wpdb->suppress_errors( $this->suppress );
-			parent::tear_down();
-		}
-
 		public function test_upload_is_user_over_quota_allowed_0_used_5() {
 			add_filter( 'get_space_allowed', '__return_zero' );
 			add_filter( 'pre_get_space_used', array( $this, '_filter_space_5' ) );
diff --git a/tests/phpunit/tests/multisite/wpNetworkQuery.php b/tests/phpunit/tests/multisite/wpNetworkQuery.php
index 978a2471d9..42fcc21f96 100644
--- a/tests/phpunit/tests/multisite/wpNetworkQuery.php
+++ b/tests/phpunit/tests/multisite/wpNetworkQuery.php
@@ -12,20 +12,6 @@ if ( is_multisite() ) :
 	class Tests_Multisite_wpNetworkQuery extends WP_UnitTestCase {
 		protected static $network_ids;
 
-		protected $suppress = false;
-
-		function set_up() {
-			global $wpdb;
-			parent::set_up();
-			$this->suppress = $wpdb->suppress_errors();
-		}
-
-		function tear_down() {
-			global $wpdb;
-			$wpdb->suppress_errors( $this->suppress );
-			parent::tear_down();
-		}
-
 		public static function wpSetUpBeforeClass( WP_UnitTest_Factory $factory ) {
 			self::$network_ids = array(
 				'wordpress.org/'      => array(
diff --git a/tests/phpunit/tests/multisite/wpSiteQuery.php b/tests/phpunit/tests/multisite/wpSiteQuery.php
index ccfd6c9cb9..f48667f23f 100644
--- a/tests/phpunit/tests/multisite/wpSiteQuery.php
+++ b/tests/phpunit/tests/multisite/wpSiteQuery.php
@@ -12,20 +12,6 @@ if ( is_multisite() ) :
 		protected static $network_ids;
 		protected static $site_ids;
 
-		protected $suppress = false;
-
-		function set_up() {
-			global $wpdb;
-			parent::set_up();
-			$this->suppress = $wpdb->suppress_errors();
-		}
-
-		function tear_down() {
-			global $wpdb;
-			$wpdb->suppress_errors( $this->suppress );
-			parent::tear_down();
-		}
-
 		public static function wpSetUpBeforeClass( WP_UnitTest_Factory $factory ) {
 			self::$network_ids = array(
 				'wordpress.org/'      => array(
diff --git a/tests/phpunit/tests/option/multisite.php b/tests/phpunit/tests/option/multisite.php
index 54388d0144..4a16bb9748 100644
--- a/tests/phpunit/tests/option/multisite.php
+++ b/tests/phpunit/tests/option/multisite.php
@@ -10,19 +10,6 @@ if ( is_multisite() ) :
 	 * @group multisite
 	 */
 	class Tests_Multisite_Option extends WP_UnitTestCase {
-		protected $suppress = false;
-
-		function set_up() {
-			global $wpdb;
-			parent::set_up();
-			$this->suppress = $wpdb->suppress_errors();
-		}
-
-		function tear_down() {
-			global $wpdb;
-			$wpdb->suppress_errors( $this->suppress );
-			parent::tear_down();
-		}
 
 		function test_from_same_site() {
 			$key    = __FUNCTION__ . '_1';
diff --git a/tests/phpunit/tests/user/multisite.php b/tests/phpunit/tests/user/multisite.php
index 0b2b1d380a..c73a0bc12b 100644
--- a/tests/phpunit/tests/user/multisite.php
+++ b/tests/phpunit/tests/user/multisite.php
@@ -10,19 +10,6 @@ if ( is_multisite() ) :
 	 * @group multisite
 	 */
 	class Tests_Multisite_User extends WP_UnitTestCase {
-		protected $suppress = false;
-
-		function set_up() {
-			global $wpdb;
-			parent::set_up();
-			$this->suppress = $wpdb->suppress_errors();
-		}
-
-		function tear_down() {
-			global $wpdb;
-			$wpdb->suppress_errors( $this->suppress );
-			parent::tear_down();
-		}
 
 		function test_remove_user_from_blog() {
 			$user1 = self::factory()->user->create_and_get();
@@ -395,9 +382,13 @@ if ( is_multisite() ) :
 		 * @ticket 38356
 		 */
 		public function test_add_user_to_blog_invalid_user() {
+			global $wpdb;
+
 			$site_id = self::factory()->blog->create();
 
-			$result = add_user_to_blog( 73622, $site_id, 'subscriber' );
+			$suppress = $wpdb->suppress_errors();
+			$result   = add_user_to_blog( 73622, $site_id, 'subscriber' );
+			$wpdb->suppress_errors( $suppress );
 
 			wp_delete_site( $site_id );