diff --git a/src/AbstractExtendedPdo.php b/src/AbstractExtendedPdo.php
index 84d4dc2f..56b923de 100644
--- a/src/AbstractExtendedPdo.php
+++ b/src/AbstractExtendedPdo.php
@@ -672,6 +672,8 @@ public function quote(mixed $value, int $type = self::PARAM_STR): string
     {
         $this->connect();
 
+        $value = $value ?? '';
+
         // non-array quoting
         if (! is_array($value)) {
             return $this->pdo->quote($value, $type);
diff --git a/tests/ExtendedPdoTest.php b/tests/ExtendedPdoTest.php
index 2398467b..ec3221ed 100644
--- a/tests/ExtendedPdoTest.php
+++ b/tests/ExtendedPdoTest.php
@@ -670,6 +670,7 @@ public function testNoExportOfLoginCredentials()
 
     protected function dump($pdo)
     {
+        ini_set('xdebug.cli_color', 0);
         ob_start();
         var_dump($pdo);
         $data = ob_get_clean();