diff --git a/tests/CronBuilderTest.php b/tests/CronBuilderTest.php
index c9680f7..1141e12 100644
--- a/tests/CronBuilderTest.php
+++ b/tests/CronBuilderTest.php
@@ -79,7 +79,7 @@ public function it_merges1(): void
      */
     public function it_merges2(): void
     {
-        $existingCrontab = '';
+        $existingCrontab = ' ';
 
         $expected = <<<CRON
 ###> Generated by PHPUnit ###