diff --git a/tests/unit/Db/CardTest.php b/tests/unit/Db/CardTest.php
index 15c5c9f50..a32fa3c0e 100644
--- a/tests/unit/Db/CardTest.php
+++ b/tests/unit/Db/CardTest.php
@@ -117,14 +117,6 @@ class CardTest extends TestCase {
 		], (new CardDetails($card))->jsonSerialize());
 	}
 
-	public function testMysqlDateFallback() {
-		$date = new DateTime();
-		$card = new Card();
-		$card->setDuedate($date->format('c'));
-		$card->setDatabaseType('mysql');
-		$this->assertEquals($date->format('Y-m-d H:i:s'), $card->getDuedate(false));
-	}
-
 	public function testJsonSerializeAsignedUsers() {
 		$card = $this->createCard();
 		$card->setAssignedUsers([ 'user1' ]);
diff --git a/tests/unit/Service/CardServiceTest.php b/tests/unit/Service/CardServiceTest.php
index dd18e67e9..982c96146 100644
--- a/tests/unit/Service/CardServiceTest.php
+++ b/tests/unit/Service/CardServiceTest.php
@@ -221,7 +221,7 @@ class CardServiceTest extends TestCase {
 		$this->assertEquals('text', $actual->getType());
 		$this->assertEquals(999, $actual->getOrder());
 		$this->assertEquals('foo', $actual->getDescription());
-		$this->assertEquals('2017-01-01T00:00:00+00:00', $actual->getDuedate());
+		$this->assertEquals(new \DateTime('2017-01-01T00:00:00+00:00'), $actual->getDuedate());
 	}
 
 	public function testUpdateArchived() {