diff --git a/Transport/Doctrine/Connection.php b/Transport/Doctrine/Connection.php
index f665e8b3..c0763eb1 100644
--- a/Transport/Doctrine/Connection.php
+++ b/Transport/Doctrine/Connection.php
@@ -86,13 +86,13 @@ public static function buildConfiguration($dsn, array $options = [])
         // check for extra keys in options
         $optionsExtraKeys = array_diff(array_keys($options), array_keys(self::DEFAULT_OPTIONS));
         if (0 < \count($optionsExtraKeys)) {
-            throw new InvalidArgumentException(sprintf('Unknown option found : [%s]. Allowed options are [%s]', implode(', ', $optionsExtraKeys), implode(', ', self::DEFAULT_OPTIONS)));
+            throw new InvalidArgumentException(sprintf('Unknown option found : [%s]. Allowed options are [%s]', implode(', ', $optionsExtraKeys), implode(', ', array_keys(self::DEFAULT_OPTIONS))));
         }
 
         // check for extra keys in options
         $queryExtraKeys = array_diff(array_keys($query), array_keys(self::DEFAULT_OPTIONS));
         if (0 < \count($queryExtraKeys)) {
-            throw new InvalidArgumentException(sprintf('Unknown option found in DSN: [%s]. Allowed options are [%s]', implode(', ', $queryExtraKeys), implode(', ', self::DEFAULT_OPTIONS)));
+            throw new InvalidArgumentException(sprintf('Unknown option found in DSN: [%s]. Allowed options are [%s]', implode(', ', $queryExtraKeys), implode(', ', array_keys(self::DEFAULT_OPTIONS))));
         }
 
         return $configuration;