diff --git a/tests/unit/Docker/EnvTest.php b/tests/unit/Docker/EnvTest.php
index f085d62e56..6730491438 100644
--- a/tests/unit/Docker/EnvTest.php
+++ b/tests/unit/Docker/EnvTest.php
@@ -28,6 +28,7 @@ class EnvTest extends TestCase
         $this->assertEquals('value1', $this->object->getVar('_APP_X'));
         $this->assertEquals('value2', $this->object->getVar('_APP_Y'));
         $this->assertEquals('value3', $this->object->getVar('_APP_Z'));
+        $this->assertEquals('value5=', $this->object->getVar('_APP_W'));
         $this->assertEquals('value4', $this->object->getVar('_APP_TEST'));
     }