diff --git a/providers/class-two-factor-fido-u2f.php b/providers/class-two-factor-fido-u2f.php
index f775224c..c90cf6b3 100644
--- a/providers/class-two-factor-fido-u2f.php
+++ b/providers/class-two-factor-fido-u2f.php
@@ -143,7 +143,7 @@ public static function enqueue_scripts() {
 	 * @since 0.1-dev
 	 *
 	 * @param WP_User $user WP_User object of the logged-in user.
-	 * @return null
+	 * @return void
 	 */
 	public function authentication_page( $user ) {
 		require_once ABSPATH . '/wp-admin/includes/template.php';
@@ -165,7 +165,7 @@ public function authentication_page( $user ) {
 			?>
 			<p><?php esc_html_e( 'An error occurred while creating authentication data.', 'two-factor' ); ?></p>
 			<?php
-			return null;
+			return;
 		}
 
 		wp_localize_script(
diff --git a/providers/class-two-factor-totp.php b/providers/class-two-factor-totp.php
index a90e4a8f..c5e527a2 100644
--- a/providers/class-two-factor-totp.php
+++ b/providers/class-two-factor-totp.php
@@ -142,7 +142,7 @@ public function enqueue_assets( $hook_suffix ) {
 	/**
 	 * Rest API endpoint for handling deactivation of TOTP.
 	 *
-	 * @param WP_Rest_Request $request The Rest Request object.
+	 * @param WP_REST_Request $request The Rest Request object.
 	 * @return array Success array.
 	 */
 	public function rest_delete_totp( $request ) {
@@ -164,7 +164,7 @@ public function rest_delete_totp( $request ) {
 	/**
 	 * REST API endpoint for setting up TOTP.
 	 *
-	 * @param WP_Rest_Request $request The Rest Request object.
+	 * @param WP_REST_Request $request The Rest Request object.
 	 * @return WP_Error|array Array of data on success, WP_Error on error.
 	 */
 	public function rest_setup_totp( $request ) {
@@ -203,8 +203,8 @@ public function rest_setup_totp( $request ) {
 	/**
 	 * Generates a URL that can be used to create a QR code.
 	 *
-	 * @param WP_User $user The user to generate a URL for.
-	 * @param string  $key  The secret key.
+	 * @param WP_User $user       The user to generate a URL for.
+	 * @param string  $secret_key The secret key.
 	 *
 	 * @return string
 	 */