diff --git a/tests/phpunit/tests/multisite/site.php b/tests/phpunit/tests/multisite/site.php
index 28b0ac88ae..130134e19c 100644
--- a/tests/phpunit/tests/multisite/site.php
+++ b/tests/phpunit/tests/multisite/site.php
@@ -1095,11 +1095,12 @@ class Tests_Multisite_Site extends WP_UnitTestCase {
 		update_site_option( 'blog_upload_space', 250 );
 		add_filter( 'pre_get_space_used', array( $this, '_filter_space_used' ) );
 		$available = is_upload_space_available();
+		$used = get_space_used();
 		remove_filter( 'pre_get_space_used', array( $this, '_filter_space_used' ) );
 
 		$this->assertEquals(
 			$available,
-			self::$space_used < 250
+			$used < 250
 		);
 	}
 
diff --git a/tests/phpunit/tests/xmlrpc/wp/uploadFile.php b/tests/phpunit/tests/xmlrpc/wp/uploadFile.php
index 05f4feda2c..a303ffc123 100644
--- a/tests/phpunit/tests/xmlrpc/wp/uploadFile.php
+++ b/tests/phpunit/tests/xmlrpc/wp/uploadFile.php
@@ -41,7 +41,7 @@ class Tests_XMLRPC_wp_uploadFile extends WP_XMLRPC_UnitTestCase {
 	function test_network_limit() {
 		$this->make_user_by_role( 'editor' );
 
-		update_option( 'blog_upload_space', 0.1 );
+		update_option( 'blog_upload_space', 0 );
 
 		// create attachment
 		$filename = ( DIR_TESTDATA . '/images/canola.jpg' );