diff --git a/apps/dav/lib/Command/RemoveInvalidShares.php b/apps/dav/lib/Command/RemoveInvalidShares.php
index 12a5ee43d47..a42396cf5b5 100644
--- a/apps/dav/lib/Command/RemoveInvalidShares.php
+++ b/apps/dav/lib/Command/RemoveInvalidShares.php
@@ -1,5 +1,4 @@
 <?php
-declare(strict_types=1);
 /**
  * @author Thomas Müller <thomas.mueller@tmit.eu>
  *
diff --git a/apps/dav/lib/DAV/Sharing/Backend.php b/apps/dav/lib/DAV/Sharing/Backend.php
index 8412ccc6010..030a3de3443 100644
--- a/apps/dav/lib/DAV/Sharing/Backend.php
+++ b/apps/dav/lib/DAV/Sharing/Backend.php
@@ -67,7 +67,7 @@ class Backend {
 	 * @param string[] $add
 	 * @param string[] $remove
 	 */
-	public function updateShares(IShareable $shareable, array $add, array $remove) {
+	public function updateShares(IShareable $shareable, $add, $remove) {
 		foreach($add as $element) {
 			$principal = $this->principalBackend->findByUri($element['href'], '');
 			if ($principal !== '') {
diff --git a/apps/dav/lib/Server.php b/apps/dav/lib/Server.php
index ef8949485e0..150b3dd78c1 100644
--- a/apps/dav/lib/Server.php
+++ b/apps/dav/lib/Server.php
@@ -287,7 +287,7 @@ class Server {
 		$this->server->exec();
 	}
 
-	private function requestIsForSubtree(array $subTrees): bool {
+	private function requestIsForSubtree($subTrees) {
 		foreach ($subTrees as $subTree) {
 			$subTree = trim($subTree, ' /');
 			if (strpos($this->server->getRequestUri(), $subTree.'/') === 0) {
diff --git a/apps/dav/tests/unit/ServerTest.php b/apps/dav/tests/unit/ServerTest.php
index 986899a2107..74939d43a14 100644
--- a/apps/dav/tests/unit/ServerTest.php
+++ b/apps/dav/tests/unit/ServerTest.php
@@ -41,7 +41,7 @@ class ServerTest extends \Test\TestCase {
 	/**
 	 * @dataProvider providesUris
 	 */
-	public function test($uri, array $plugins) {
+	public function test($uri, $plugins) {
 		/** @var IRequest | \PHPUnit_Framework_MockObject_MockObject $r */
 		$r = $this->createMock(IRequest::class);
 		$r->expects($this->any())->method('getRequestUri')->willReturn($uri);