diff --git a/src/Database.php b/src/Database.php
index 3f61550..0308b89 100644
--- a/src/Database.php
+++ b/src/Database.php
@@ -57,8 +57,10 @@ class Database extends PDO
             if (isset($dsn['schema'])) {
                 $connection->query('SET search_path TO ' . $dsn['schema']);
             }
-        }
-        if ($dsn['phptype'] == 'sqlite') {
+        } elseif ($dsn['phptype'] == 'sqlite::memory') {
+            $connection = new self("{$dsn['phptype']}:");
+            $connection->sqliteCreateFunction('LOWER', 'sqliteLower', 1);
+        } elseif ($dsn['phptype'] == 'sqlite') {
             $connection/*: Database*/ = new self("{$dsn['phptype']}:{$dsn['database']}");
             $connection->setAttribute(PDO::ATTR_TIMEOUT, 5);
             $mode = defined('SQLITE_JOURNAL_MODE') ? SQLITE_JOURNAL_MODE : 'WAL';