diff --git a/Tests/xdiffTest.php b/Tests/xdiffTest.php
index c1efc7f..9e61f0b 100644
--- a/Tests/xdiffTest.php
+++ b/Tests/xdiffTest.php
@@ -180,8 +180,9 @@ to this document.
     // Mode unified
     $xdiff = new xdiff ("unified");
     $res = $xdiff->diff ($this->string1, $this->string2);
-    $this->assertSame ($res, "--- Original ".date ("Y-m-d H:i:s.u000 O")."
-+++ New ".date ("Y-m-d H:i:s.u001 O")."
+    $date = date ("Y-m-d H:i:s.u00");
+    $this->assertSame ($res, "--- Original ${date}0 +0100
++++ New ${date}1 +0100
 @@ -0,0 +1,6 @@
 +This is an important
 +notice! It should