diff --git a/tests/XML/ds/ManifestTest.php b/tests/XML/ds/ManifestTest.php
index 103eae99..8f9c1b8b 100644
--- a/tests/XML/ds/ManifestTest.php
+++ b/tests/XML/ds/ManifestTest.php
@@ -65,7 +65,7 @@ public function testMarshalling(): void
             C::XMLDSIG_MANIFEST,
             '#_1e280ee704fb1d8d9dec4bd6c1889ec96942921153',
         );
-        $manifest = new Manifest([$reference], 'abc123');
+        $manifest = new Manifest([$reference], 'def456');
 
         $this->assertEquals(
             self::$xmlRepresentation->saveXML(self::$xmlRepresentation->documentElement),
diff --git a/tests/resources/xml/ds_Manifest.xml b/tests/resources/xml/ds_Manifest.xml
index ac80e3f3..c2a919c2 100644
--- a/tests/resources/xml/ds_Manifest.xml
+++ b/tests/resources/xml/ds_Manifest.xml
@@ -1,4 +1,4 @@
-<ds:Manifest xmlns:ds="http://www.w3.org/2000/09/xmldsig#" Id="abc123">
+<ds:Manifest xmlns:ds="http://www.w3.org/2000/09/xmldsig#" Id="def456">
   <ds:Reference Id="abc123" Type="http://www.w3.org/2000/09/xmldsig#Manifest" URI="#_1e280ee704fb1d8d9dec4bd6c1889ec96942921153">
     <ds:Transforms>
       <ds:Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature" />