diff --git a/src/Dibi/DateTime.php b/src/Dibi/DateTime.php
index b43a1c2f..b6c00bc5 100644
--- a/src/Dibi/DateTime.php
+++ b/src/Dibi/DateTime.php
@@ -22,7 +22,7 @@ class DateTime extends \DateTime
 	{
 		if (is_numeric($time)) {
 			parent::__construct('@' . $time);
-			$this->setTimeZone($timezone ? $timezone : new \DateTimeZone(date_default_timezone_get()));
+			$this->setTimeZone($timezone ?: new \DateTimeZone(date_default_timezone_get()));
 		} elseif ($timezone === null) {
 			parent::__construct($time);
 		} else {
diff --git a/src/Dibi/Drivers/PostgreDriver.php b/src/Dibi/Drivers/PostgreDriver.php
index 9b12b0d1..a45c0881 100644
--- a/src/Dibi/Drivers/PostgreDriver.php
+++ b/src/Dibi/Drivers/PostgreDriver.php
@@ -547,7 +547,7 @@ class PostgreDriver implements Dibi\Driver, Dibi\ResultDriver, Dibi\Reflector
 
 		$res = $this->query($query);
 		$tables = pg_fetch_all($res->resultSet);
-		return $tables ? $tables : [];
+		return $tables ?: [];
 	}