diff --git a/tests/e2e/Services/Account/AccountCustomClientTest.php b/tests/e2e/Services/Account/AccountCustomClientTest.php
index 452b725c11..c4684a1225 100644
--- a/tests/e2e/Services/Account/AccountCustomClientTest.php
+++ b/tests/e2e/Services/Account/AccountCustomClientTest.php
@@ -781,7 +781,7 @@ class AccountCustomClientTest extends Scope
         $this->assertEquals('Account Verification', $lastEmail['subject']);
 
         $verification = substr($lastEmail['text'], strpos($lastEmail['text'], '&secret=', 0) + 8, 256);
-        $expireTime = strpos($lastEmail['text'], 'expire=' . urlencode(DateTime::format(new \DateTime($response['body']['expire']))), 0);
+        $expireTime = strpos($lastEmail['text'], 'expire=' . urlencode((new \DateTime($response['body']['expire']))->format('Y-m-d\TH:i:s.v')), 0);
         $this->assertNotFalse($expireTime);
 
         $secretTest = strpos($lastEmail['text'], 'secret=' . $response['body']['secret'], 0);
@@ -1084,7 +1084,7 @@ class AccountCustomClientTest extends Scope
 
         $recovery = substr($lastEmail['text'], strpos($lastEmail['text'], '&secret=', 0) + 8, 256);
 
-        $expireTime = strpos($lastEmail['text'], 'expire=' . urlencode(DateTime::format(new \DateTime($response['body']['expire']))), 0);
+        $expireTime = strpos($lastEmail['text'], 'expire=' . urlencode((new \DateTime($response['body']['expire']))->format('Y-m-d\TH:i:s.v')), 0);
 
         $this->assertNotFalse($expireTime);