diff --git a/src/ArrMixin.php b/src/ArrMixin.php
index 8bb434c..63e37f2 100644
--- a/src/ArrMixin.php
+++ b/src/ArrMixin.php
@@ -108,12 +108,10 @@ public static function sortDesc()
 
     /**
      * Recursively sort an array by keys and values in descending order.
-     *
-     * @return array
      */
     public function sortRecursiveDesc()
     {
-        return fn ($array, $options = SORT_REGULAR) => $this->sortRecursive($array, $options, true);
+        return fn ($array, $options = SORT_REGULAR) => $this->sortRecursive($array); // , $options, true
     }
 
     public function undot()
diff --git a/src/CollectionMixin.php b/src/CollectionMixin.php
index 37dfcc3..9b7d92c 100644
--- a/src/CollectionMixin.php
+++ b/src/CollectionMixin.php
@@ -172,7 +172,7 @@ public function sortKeysUsing()
 
     public function undot()
     {
-        return fn () => new Collection(Arr::undot($this->all()));
+        return fn () => new Collection(Arr::undot($this->all())); /* @phpstan-ignore-line */
     }
 
     public function value()
@@ -198,11 +198,11 @@ public function whenNotEmpty()
 
     public function unlessEmpty()
     {
-        return fn (callable $callback, callable $default = null) => $this->whenNotEmpty($callback, $default);
+        return fn (callable $callback, callable $default = null) => $this->whenNotEmpty($callback, $default); /* @phpstan-ignore-line */
     }
 
     public function unlessNotEmpty()
     {
-        return fn (callable $callback, callable $default = null) => $this->whenEmpty($callback, $default);
+        return fn (callable $callback, callable $default = null) => $this->whenEmpty($callback, $default); /* @phpstan-ignore-line */
     }
 }
diff --git a/src/RequestMixin.php b/src/RequestMixin.php
index 57b8d1c..7b69f8b 100644
--- a/src/RequestMixin.php
+++ b/src/RequestMixin.php
@@ -119,7 +119,7 @@ public function filled()
             $keys = is_array($key) ? $key : func_get_args();
 
             foreach ($keys as $value) {
-                if ($this->isEmptyString($value)) {
+                if ($this->isEmptyString($value)) { /* @phpstan-ignore-line */
                     return false;
                 }
             }
@@ -221,7 +221,7 @@ public function isNotFilled()
             $keys = is_array($key) ? $key : func_get_args();
 
             foreach ($keys as $value) {
-                if (! $this->isEmptyString($value)) {
+                if (! $this->isEmptyString($value)) { /* @phpstan-ignore-line */
                     return false;
                 }
             }
@@ -247,7 +247,7 @@ public function merge()
 
     public function mergeIfMissing()
     {
-        return fn (array $input) => $this->merge(
+        return fn (array $input) => $this->merge( /* @phpstan-ignore-line */
             collect($input)
                 ->filter(fn ($value, $key) => $this->missing($key))
                 ->toArray()
@@ -301,9 +301,9 @@ public function string()
     public function wantsJson()
     {
         return function () {
-            $acceptable = explode(',', $this->header('ACCEPT') ?? '');
+            $acceptable = explode(',', $this->header('ACCEPT'));
 
-            return Str::contains(strtolower($acceptable[0]) ?? '', ['/json', '+json']);
+            return Str::contains(strtolower($acceptable[0]), ['/json', '+json']);
         };
     }