diff --git a/tests/LoadTest.php b/tests/LoadTest.php
index a70e8cb..c0a1d1a 100644
--- a/tests/LoadTest.php
+++ b/tests/LoadTest.php
@@ -170,6 +170,23 @@ class LoadTest extends PHPUnit_Framework_TestCase
         Load::autoload('DbDriver');
     }
 
+    /**
+     * @runInSeparateProcess
+     */
+    public function testSetExclude()
+    {
+        $reflection_prop = new ReflectionProperty('Load', 'exclude');
+        $reflection_prop->setAccessible(true);
+        $this->assertCount(0, $reflection_prop->getValue('Load'));
+        Load::setExclude('dir1');
+        $this->assertCount(1, $reflection_prop->getValue('Load'));
+        Load::setExclude(array('dir2'));
+        $this->assertCount(2, $reflection_prop->getValue('Load'));
+
+        $this->assertSame(array('dir1', 'dir2'), $reflection_prop->getValue('Load'));
+
+    }
+
 
     protected function newCallback($className)
     {