diff --git a/tests/unit/Db/AclTest.php b/tests/unit/Db/AclTest.php
index befbeb3c5..d11e22226 100644
--- a/tests/unit/Db/AclTest.php
+++ b/tests/unit/Db/AclTest.php
@@ -29,7 +29,7 @@ class AclTest extends \Test\TestCase {
 		$acl = new Acl();
 		$acl->setId(1);
 		$acl->setParticipant("admin");
-		$acl->setType("user");
+		$acl->setType(Acl::PERMISSION_TYPE_USER);
 		$acl->setBoardId(1);
 		$acl->setPermissionEdit(true);
 		$acl->setPermissionShare(true);
@@ -41,7 +41,7 @@ class AclTest extends \Test\TestCase {
 		$acl = new Acl();
 		$acl->setId(1);
 		$acl->setParticipant("administrators");
-		$acl->setType("group");
+		$acl->setType(Acl::PERMISSION_TYPE_GROUP);
 		$acl->setBoardId(1);
 		$acl->setPermissionEdit(true);
 		$acl->setPermissionShare(true);
@@ -54,7 +54,7 @@ class AclTest extends \Test\TestCase {
 		$this->assertEquals([
 			'id' => 1,
 			'participant' => 'admin',
-			'type' => 'user',
+			'type' => Acl::PERMISSION_TYPE_USER,
 			'boardId' => 1,
 			'permissionEdit' => true,
 			'permissionShare' => true,
@@ -65,7 +65,7 @@ class AclTest extends \Test\TestCase {
 		$this->assertEquals([
 			'id' => 1,
 			'participant' => 'administrators',
-			'type' => 'group',
+			'type' => Acl::PERMISSION_TYPE_GROUP,
 			'boardId' => 1,
 			'permissionEdit' => true,
 			'permissionShare' => true,
@@ -80,7 +80,7 @@ class AclTest extends \Test\TestCase {
 		$this->assertEquals([
 			'id' => 1,
 			'participant' => 'admin',
-			'type' => 'user',
+			'type' => Acl::PERMISSION_TYPE_USER,
 			'boardId' => 1,
 			'permissionEdit' => true,
 			'permissionShare' => true,
diff --git a/tests/unit/Migration/UnknownUserTest.php b/tests/unit/Migration/UnknownUserTest.php
index 5c61e6963..d58aea778 100644
--- a/tests/unit/Migration/UnknownUserTest.php
+++ b/tests/unit/Migration/UnknownUserTest.php
@@ -66,10 +66,10 @@ class UnknownUserTest extends \Test\TestCase {
 			$this->getBoard(1,'Test', 'admin'),
 		];
 		$acl = [
-			$this->getAcl('user', 'existing', 1),
-			$this->getAcl('user', 'not existing', 1),
-			$this->getAcl('group', 'existing', 1),
-			$this->getAcl('group', 'not existing', 1),
+			$this->getAcl(Acl::PERMISSION_TYPE_USER, 'existing', 1),
+			$this->getAcl(Acl::PERMISSION_TYPE_USER, 'not existing', 1),
+			$this->getAcl(Acl::PERMISSION_TYPE_GROUP, 'existing', 1),
+			$this->getAcl(Acl::PERMISSION_TYPE_GROUP, 'not existing', 1),
 		];
 		$this->aclMapper->expects($this->at(0))
 			->method('findAll')
@@ -109,7 +109,7 @@ class UnknownUserTest extends \Test\TestCase {
 
 
 	/** @return Acl */
-	public function getAcl($type='user', $participant='admin', $boardId=123) {
+	public function getAcl($type=Acl::PERMISSION_TYPE_USER, $participant='admin', $boardId=123) {
 		$acl = new Acl();
 		$acl->setParticipant($participant);
 		$acl->setType($type);