diff --git a/.travis.yml b/.travis.yml
index 5b2901df81..18b0af82b2 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -72,8 +72,9 @@ before_script:
 
 script:
   - mkdir -p reports/coverage
-  - if [ ! $COVERAGE ] ; then php data/vendor/bin/phpunit -c phpunit.xml.dist ; fi
-  - if [ $COVERAGE ] ; then phpdbg -qrr data/vendor/bin/phpunit -c phpunit.xml.dist ; fi
+  - if [ ! $COVERAGE ] ; then php data/vendor/bin/phpunit -c phpunit.xml.dist --exclude-group classloader ; fi
+  - if [ ! $COVERAGE ] ; then php data/vendor/bin/phpunit -c phpunit.xml.dist --group classloader ; fi
+  - if [ $COVERAGE ] ; then phpdbg -qrr data/vendor/bin/phpunit -c phpunit.xml.dist --exclude-group classloader ; fi
   - if [ ! $COVERAGE ] ; then php data/vendor/bin/codecept run --env chrome --steps ; fi
 
 after_script:
diff --git a/appveyor.yml b/appveyor.yml
index 104f7b18c8..ea33de88b7 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -83,6 +83,6 @@ build: off
 
 before_test:
   - bash eccube_install.sh mysql
-    
+
 test_script:
-  - data/vendor/bin/phpunit
+  - data/vendor/bin/phpunit --exclude-group classloader
diff --git a/data/app_initial.php b/data/app_initial.php
index 926e1fd63c..4cce0ee473 100644
--- a/data/app_initial.php
+++ b/data/app_initial.php
@@ -47,7 +47,7 @@
 
 // クラスのオートローディングを定義する
 require_once(CLASS_EX_REALDIR . 'SC_ClassAutoloader_Ex.php');
-spl_autoload_register(array('SC_ClassAutoloader_Ex', 'autoload'));
+spl_autoload_register(array('SC_ClassAutoloader_Ex', 'autoload'), true, true);
 
 SC_Helper_HandleError_Ex::load();
 
diff --git a/tests/class/plugin/LoadClassFileChangeTest.php b/tests/class/plugin/LoadClassFileChangeTest.php
new file mode 100644
index 0000000000..803d81bcbd
--- /dev/null
+++ b/tests/class/plugin/LoadClassFileChangeTest.php
@@ -0,0 +1,137 @@
+<?php
+
+/**
+ * @group classloader
+ */
+class LoadClassFileChangeTest extends Common_TestCase
+{
+    protected function setUp()
+    {
+        parent::setUp();
+        $this->createPlugin();
+        if (PHP_VERSION_ID < 70200) {
+            $objPlugin = SC_Helper_Plugin_Ex::getSingletonInstance();
+            $objPlugin->load();
+        }
+    }
+
+    protected function tearDown()
+    {
+        $plugins = ['AutoloadingPlugin'];
+        foreach ($plugins as $plugin) {
+            $dir = PLUGIN_UPLOAD_REALDIR.$plugin;
+            if (!file_exists($dir)) break;
+            $files = new RecursiveIteratorIterator(
+                new RecursiveDirectoryIterator($dir, FilesystemIterator::SKIP_DOTS),
+                RecursiveIteratorIterator::CHILD_FIRST
+            );
+            foreach ($files as $file) {
+                /** @var SplFileInfo $file */
+                $file->isDir() ? rmdir($file->getPathname()) : unlink($file->getRealPath());
+            }
+            rmdir($dir);
+        }
+        parent::tearDown();
+    }
+
+    /**
+     * loadClassFileChange で拡張したクラスのテストケース.
+     */
+    public function testLoadExtendedClass()
+    {
+        $objProduct = new SC_Product_Ex();
+        $this->assertTrue(constant('SC_Product_Ex::AUTOLOAD'), 'loadClassFileChange で拡張したクラス定数にアクセスできる');
+
+        $refclass = new ReflectionClass($objProduct);
+        $this->assertTrue($refclass->hasProperty('autoloaded'), 'loadClassFileChange で拡張したプロパティが存在する');
+
+        $refProp = $refclass->getProperty('autoloaded');
+        $this->assertTrue($refProp->getValue($objProduct), 'loadClassFileChange で拡張したプロパティにアクセスできる');
+
+        $this->assertTrue($refclass->hasMethod('isExtended'), 'loadClassFileChange で拡張したメソッドが存在する');
+        $refMethod = $refclass->getMethod('isExtended');
+        $this->assertTrue($refMethod->invoke($objProduct), 'loadClassFileChange で拡張したメソッドにアクセスできる');
+    }
+
+    /**
+     * ダミーのプラグインをインストールする.
+     */
+    private function createPlugin()
+    {
+        $realdir = PLUGIN_UPLOAD_REALDIR;
+        $plugin_info = <<< __EOS__
+<?php
+class plugin_info {
+    static \$PLUGIN_CODE        = 'AutoloadingPlugin';
+    static \$PLUGIN_NAME        = 'AutoloadingPlugin';
+    static \$CLASS_NAME         = 'AutoloadingPlugin';
+    static \$PLUGIN_VERSION     = '0.0.0';
+    static \$COMPLIANT_VERSION  = '2.17';
+    static \$AUTHOR             = 'dummy';
+    static \$DESCRIPTION        = 'dummy';
+    static \$HOOK_POINTS        = 'loadClassFileChange';
+}
+__EOS__;
+       $autoloadingPlugin = <<< __EOS__
+<?php
+class AutoloadingPlugin extends SC_Plugin_Base
+{
+    public function loadClassFileChange(&\$classname, &\$classpath) {
+        if (\$classname === "SC_Product_Ex") {
+            \$classpath = "${realdir}/AutoloadingPlugin/Autoloading_SC_Product.php";
+            \$classname = "Autoloading_SC_Product";
+        }
+    }
+}
+__EOS__;
+       $Autoloading_SC_Product = <<< __EOS__
+<?php
+class Autoloading_SC_Product extends SC_Product
+{
+    const AUTOLOAD = true;
+    public \$autoloaded = true;
+    public function isExtended() {
+        return true;
+    }
+}
+__EOS__;
+
+        $files = [
+            'plugin_info' => $plugin_info,
+            'AutoloadingPlugin' => $autoloadingPlugin,
+            'Autoloading_SC_Product' => $Autoloading_SC_Product
+        ];
+
+        $dir = PLUGIN_UPLOAD_REALDIR.'AutoloadingPlugin';
+        if (!file_exists($dir)) {
+            mkdir($dir);
+        }
+        foreach ($files as $name => $content) {
+            file_put_contents($dir.'/'.$name.'.php', $content);
+        }
+
+        $plugin_id = $this->objQuery->nextVal('dtb_plugin_plugin_id');
+        $pluginValues = [
+            'plugin_id' => $plugin_id,
+            'plugin_name' => 'AutoloadingPlugin',
+            'plugin_code' => 'AutoloadingPlugin',
+            'class_name' => 'AutoloadingPlugin',
+            'plugin_version' => '0.0.0',
+            'compliant_version' => '2.17',
+            'enable' => 1,
+            'create_date' => 'CURRENT_TIMESTAMP',
+            'update_date' => 'CURRENT_TIMESTAMP'
+        ];
+        $this->objQuery->insert('dtb_plugin', $pluginValues);
+
+        $plugin_hookpoint_id = $this->objQuery->nextVal('dtb_plugin_hookpoint_plugin_hookpoint_id');
+        $hookpointValues = [
+            'plugin_hookpoint_id' => $plugin_hookpoint_id,
+            'plugin_id' => $plugin_id,
+            'hook_point' => 'loadClassFileChange',
+            'callback' => 'loadClassFileChange',
+            'update_date' => 'CURRENT_TIMESTAMP'
+        ];
+        $this->objQuery->insert('dtb_plugin_hookpoint', $hookpointValues);
+    }
+}