diff --git a/admin.php b/admin.php
index e7fe765..7c62593 100644
--- a/admin.php
+++ b/admin.php
@@ -77,6 +77,11 @@
 		'issuer_url' => $_POST['issuer_url'], 
 		'client_id' => $_POST['client_id'], 
 		'client_secret' => $_POST['client_secret'], 
+		// We want to save password_test_user and password_test_pass
+		// to prevent PHP from raising an error
+		// We reset the two values as they may contains sensitive data
+		'password_test_user' => '', 
+		'password_test_pass' => '', 
 		'scope' => $_POST['scope'], 
 		'preferred_username' => $_POST['preferred_username'], 
 		'proxy' => $_POST['proxy'], 
diff --git a/maintain.class.php b/maintain.class.php
index 7a017ca..4fcb299 100644
--- a/maintain.class.php
+++ b/maintain.class.php
@@ -23,6 +23,8 @@ class OpenIdConnect_maintain extends PluginMaintain
 		'issuer_url' => '',
 		'client_id' => '',
 		'client_secret' => '',
+		'password_test_user' => '',
+		'password_test_pass' => '',
 		'scope' => 'openid profile email',
 		'preferred_username' => '',
 		'proxy' => '',