diff --git a/Tests/Recurly/PerformanceObligation_Test.php b/Tests/Recurly/PerformanceObligation_Test.php
index 446c36bc..5b64075f 100644
--- a/Tests/Recurly/PerformanceObligation_Test.php
+++ b/Tests/Recurly/PerformanceObligation_Test.php
@@ -15,5 +15,6 @@ public function testPerformanceObligation() {
     $this->assertEquals('Over Time (Daily)', $pob->name);
     $this->assertEquals('6', $pob->id);
     $this->assertInstanceOf('DateTime', $pob->created_at);
+    $this->assertInstanceOf('DateTime', $pob->updated_at);
   }
 }