diff --git a/src/Utils/DateTimeHelper.php b/src/Utils/DateTimeHelper.php
index 226a64b0..94be9c82 100644
--- a/src/Utils/DateTimeHelper.php
+++ b/src/Utils/DateTimeHelper.php
@@ -16,7 +16,6 @@ class DateTimeHelper
 	public static function convertToTimezone(DateTimeInterface $value, DateTimeZone $connectionTz): DateTimeInterface
 	{
 		$valueTimezone = $value->getTimezone();
-		assert($value instanceof DateTime || $value instanceof \DateTimeImmutable);
 		assert($valueTimezone !== false); // @phpstan-ignore-line
 
 		if ($valueTimezone->getName() !== $connectionTz->getName()) {