diff --git a/tests/phpunit/tests/functions/wpFilesize.php b/tests/phpunit/tests/functions/wpFilesize.php
index f65aa90872..f0e510ddc5 100644
--- a/tests/phpunit/tests/functions/wpFilesize.php
+++ b/tests/phpunit/tests/functions/wpFilesize.php
@@ -11,7 +11,7 @@ class Tests_Functions_wpFilesize extends WP_UnitTestCase {
 	/**
 	 * @ticket 49412
 	 */
-	function test_wp_filesize() {
+	public function test_wp_filesize() {
 		$file = DIR_TESTDATA . '/images/test-image-upside-down.jpg';
 
 		$this->assertSame( filesize( $file ), wp_filesize( $file ) );
@@ -20,7 +20,7 @@ class Tests_Functions_wpFilesize extends WP_UnitTestCase {
 	/**
 	 * @ticket 49412
 	 */
-	function test_wp_filesize_filters() {
+	public function test_wp_filesize_filters() {
 		$file = DIR_TESTDATA . '/images/test-image-upside-down.jpg';
 
 		add_filter(
@@ -45,7 +45,7 @@ class Tests_Functions_wpFilesize extends WP_UnitTestCase {
 	/**
 	 * @ticket 49412
 	 */
-	function test_wp_filesize_with_nonexistent_file() {
+	public function test_wp_filesize_with_nonexistent_file() {
 		$file = 'nonexistent/file.jpg';
 
 		$this->assertSame( 0, wp_filesize( $file ) );