diff --git a/src/Codeception/Module/Symfony.php b/src/Codeception/Module/Symfony.php
index d7093b9b..b3049bdd 100644
--- a/src/Codeception/Module/Symfony.php
+++ b/src/Codeception/Module/Symfony.php
@@ -548,7 +548,7 @@ public function seeEmailIsSent($expectedCount = null)
             $realCount = count($mailCollector->getEvents()->getMessages());
         }
 
-        if ($expectedCount) {
+        if ($expectedCount !== null) {
             $this->assertEquals($expectedCount, $realCount, sprintf(
                 'Expected number of sent emails was %d, but in reality %d %s sent.',
                 $expectedCount, $realCount, $realCount === 2 ? 'was' : 'were'