diff --git a/src/Guard.php b/src/Guard.php
index 55c5d68a..3e157be6 100644
--- a/src/Guard.php
+++ b/src/Guard.php
@@ -40,9 +40,6 @@ public static function getNames($model): Collection
 
     /**
      * Get the model class associated with a given provider.
-     *
-     * @param  string  $provider
-     * @return string|null
      */
     protected static function getProviderModel(string $provider): ?string
     {
@@ -70,7 +67,7 @@ protected static function getConfigAuthGuards(string $class): Collection
     {
         return collect(config('auth.guards'))
             ->map(function ($guard) {
-                if (!isset($guard['provider'])) {
+                if (! isset($guard['provider'])) {
                     return null;
                 }
 
@@ -82,16 +79,13 @@ protected static function getConfigAuthGuards(string $class): Collection
 
     /**
      * Get the model associated with a given guard name.
-     *
-     * @param  string  $guard
-     * @return string|null
      */
     public static function getModelForGuard(string $guard): ?string
     {
         // Get the provider configuration for the given guard
         $provider = config("auth.guards.{$guard}.provider");
 
-        if (!$provider) {
+        if (! $provider) {
             return null;
         }
 
diff --git a/src/helpers.php b/src/helpers.php
index cf7d3887..e7d0e18a 100644
--- a/src/helpers.php
+++ b/src/helpers.php
@@ -1,9 +1,6 @@
 <?php
 
 if (! function_exists('getModelForGuard')) {
-    /**
-     * @return string|null
-     */
     function getModelForGuard(string $guard): ?string
     {
         return Spatie\Permission\Guard::getModelForGuard($guard);