diff --git a/.docker/command/test.sh b/.docker/command/test.sh
index 7d45ae7..8dd34d8 100755
--- a/.docker/command/test.sh
+++ b/.docker/command/test.sh
@@ -1,3 +1,6 @@
+#!/bin/bash
+
 sleep 5
+
 php vendor/bin/phpunit tests/Unit/
 php vendor/bin/phpstan analyse -l 3 src/
diff --git a/.github/scripts/check_expire_date.sh b/.github/scripts/check_expire_date.sh
index 0f49f3a..9640717 100644
--- a/.github/scripts/check_expire_date.sh
+++ b/.github/scripts/check_expire_date.sh
@@ -19,7 +19,7 @@ for file in $changed_files; do
 
         # 日付を抽出（[Expire] Y-m-d の形式を想定）
         # \K はそこ以前の [Expire] を省略し、Y-m-d の部分のみを取得する
-        expire_date=$(echo $line_content | grep -oP '\[Expire\] \K\d{4}-\d{2}-\d{2}')
+        expire_date=$(echo $line_content | grep -oP "\[Expire\] \K\d{4}-\d{2}-\d{2}")
 
         # 日付が抽出できなかった場合、または日付が過去の場合にエラー
         if [[ -z $expire_date ]] || [[ $expire_date < $current_date ]]; then
diff --git a/src/Exceptions/ImmutableException.php b/src/Exceptions/ImmutableException.php
index 8c557e2..8655374 100644
--- a/src/Exceptions/ImmutableException.php
+++ b/src/Exceptions/ImmutableException.php
@@ -11,5 +11,8 @@
  */
 class ImmutableException extends Exception
 {
+    /**
+     * @var string
+     */
     protected $message = 'merge() was called on an immutable request class.';
 }
diff --git a/src/Exceptions/UnsupportedOperandTypesException.php b/src/Exceptions/UnsupportedOperandTypesException.php
index fae6bd3..2333df5 100644
--- a/src/Exceptions/UnsupportedOperandTypesException.php
+++ b/src/Exceptions/UnsupportedOperandTypesException.php
@@ -11,5 +11,8 @@
  */
 class UnsupportedOperandTypesException extends Exception
 {
+    /**
+     * @var string
+     */
     protected $message = 'Unsupported operand types';
 }
diff --git a/src/Facades/AccessorName.php b/src/Facades/AccessorName.php
index 90077ee..6d1ca11 100644
--- a/src/Facades/AccessorName.php
+++ b/src/Facades/AccessorName.php
@@ -19,7 +19,7 @@ class AccessorName
     public static function getProperty(string $method): string
     {
         preg_match('/(?<=get_).+(?=_attribute)/', Str::snake($method), $match);
-        if (empty($match[0])) {
+        if (empty($match[0]) === true) {
             return '';
         }
 
@@ -33,7 +33,7 @@ public static function getProperty(string $method): string
      */
     public static function getMethod(string $property): string
     {
-        if (empty($property)) {
+        if (empty($property) === true) {
             return '';
         }
 
diff --git a/src/Facades/Route.php b/src/Facades/Route.php
index b6b35a7..02ebd8c 100644
--- a/src/Facades/Route.php
+++ b/src/Facades/Route.php
@@ -20,7 +20,7 @@ class Route
     public static function getController(): string
     {
         $route = RouteFacade::currentRouteAction();
-        if (empty($route) || strpos($route, '@') === false) {
+        if (empty($route) === true || strpos($route, '@') === false) {
             return '';
         }
 
@@ -40,7 +40,7 @@ public static function getAction(): string
     {
         //
         $route = RouteFacade::currentRouteAction();
-        if (empty($route) || strpos($route, '@') === false) {
+        if (empty($route) === true || strpos($route, '@') === false) {
             return '';
         }
 
diff --git a/src/FormRequestAccessor.php b/src/FormRequestAccessor.php
index 80d2989..ad0c2d3 100644
--- a/src/FormRequestAccessor.php
+++ b/src/FormRequestAccessor.php
@@ -59,7 +59,7 @@ trait FormRequestAccessor
      */
     public function beforeAll(): array
     {
-        if (is_null($this->before())) {
+        if ($this->before() === null) {
             return [];
         }
 
@@ -92,6 +92,8 @@ public function settings()
     }
 
     /**
+     * 全てのリクエストデータを配列で取得
+     *
      * laravel\framework\src\Illuminate\Http\Concerns\InteractsWithInput.php
      *
      * @param  array|mixed  $keys
@@ -221,7 +223,7 @@ public function validateResolved()
      */
     public function before(): self
     {
-        if (is_null($this->beforeRequest)) {
+        if ($this->beforeRequest === null) {
             return new $this;
         }