diff --git a/src/wp-admin/includes/ms.php b/src/wp-admin/includes/ms.php
index 6125ac116e..f1eb8531dc 100644
--- a/src/wp-admin/includes/ms.php
+++ b/src/wp-admin/includes/ms.php
@@ -417,9 +417,9 @@ function upload_is_user_over_quota( $echo = true ) {
 		return false;
 
 	$space_allowed = get_space_allowed();
-	if ( empty( $space_allowed ) || !is_numeric( $space_allowed ) )
+	if ( ! is_numeric( $space_allowed ) ) {
 		$space_allowed = 10; // Default space allowed is 10 MB
-
+	}
 	$space_used = get_space_used();
 
 	if ( ( $space_allowed - $space_used ) < 0 ) {
diff --git a/tests/phpunit/tests/multisite/uploadIsUserOverQuota.php b/tests/phpunit/tests/multisite/uploadIsUserOverQuota.php
index 22c3d2553e..73e432c9ca 100644
--- a/tests/phpunit/tests/multisite/uploadIsUserOverQuota.php
+++ b/tests/phpunit/tests/multisite/uploadIsUserOverQuota.php
@@ -27,12 +27,6 @@ class Tests_Multisite_Upload_Is_User_Over_Quota extends WP_UnitTestCase {
 		parent::tearDown();
 	}
 
-	/**
-	 * In this scenario, 10 is set as the spaced allowed when 0 is returned
-	 * by `get_space_allowed()` inside `upload_is_user_over_quota()`.
-	 *
-	 * This is likely not expected behavior.
-	 */
 	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' ) );
@@ -40,7 +34,7 @@ class Tests_Multisite_Upload_Is_User_Over_Quota extends WP_UnitTestCase {
 		remove_filter( 'get_space_allowed', '__return_zero' );
 		remove_filter( 'pre_get_space_used', array( $this, '_filter_space_5' ) );
 
-		$this->assertFalse( $result );
+		$this->assertTrue( $result );
 	}
 
 	public function test_upload_is_user_over_quota_allowed_0_used_0() {