diff --git a/review/assertion/pifr_assertion.server.inc b/review/assertion/pifr_assertion.server.inc
index 283b4d5..3079422 100644
--- a/review/assertion/pifr_assertion.server.inc
+++ b/review/assertion/pifr_assertion.server.inc
@@ -28,7 +28,7 @@ abstract class pifr_server_review_pifr_assertion extends pifr_server_review {
    *
    * @var string
    */
-  protected $detail_message = '@pass pass(es), @fail fail(s), and @exception exception(es)';
+  protected $detail_message = '@pass pass(es), @fail fail(s), and @exception exception(s)';
 
   /**
    * Modify step information.