diff --git a/tests/phpunit/class-solr-test-base.php b/tests/phpunit/class-solr-test-base.php
index cb4fde44..114b3be4 100644
--- a/tests/phpunit/class-solr-test-base.php
+++ b/tests/phpunit/class-solr-test-base.php
@@ -19,7 +19,7 @@ function __construct() {
 	/**
 	 * Setup for every test.
 	 */
-	function setUp(): void {
+	function setUp() {
 		parent::setUp();
 
 		if ( ! SolrPower_API::get_instance()->ping_server() ) {