diff --git a/tests/danog/MadelineProto/DataCenterTest.php b/tests/danog/MadelineProto/DataCenterTest.php
index 691145cf7..b286f59c1 100644
--- a/tests/danog/MadelineProto/DataCenterTest.php
+++ b/tests/danog/MadelineProto/DataCenterTest.php
@@ -26,7 +26,6 @@ use Generator;
 use Throwable;
 
 use function Amp\ByteStream\splitLines;
-use function Amp\delay;
 
 \define('MADELINEPROTO_TEST', 'pony');
 
diff --git a/tests/lock_setup.php b/tests/lock_setup.php
index eb8847631..ba776cb89 100644
--- a/tests/lock_setup.php
+++ b/tests/lock_setup.php
@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 
 $lock = fopen('woodpecker.lock', 'c+');
 flock($lock, LOCK_EX);
@@ -14,4 +14,4 @@ if (fread($lock, 1) !== "1") {
 flock($lock, LOCK_UN);
 
 echo implode("\n", $o);
-exit($res);
\ No newline at end of file
+exit($res);