3 files changed, 3 insertions, 3 deletions
diff --git a/tests/lib/Files/ObjectStore/FailDeleteObjectStore.php b/tests/lib/Files/ObjectStore/FailDeleteObjectStore.php
index 5160abe574f..6613153f37f 100644
--- a/tests/lib/Files/ObjectStore/FailDeleteObjectStore.php
+++ b/tests/lib/Files/ObjectStore/FailDeleteObjectStore.php
@@ -40,7 +40,7 @@ class FailDeleteObjectStore implements IObjectStore {
 		return $this->objectStore->readObject($urn);
 	}
 
-	public function writeObject($urn, $stream, string $mimetype = null) {
+	public function writeObject($urn, $stream, ?string $mimetype = null) {
 		return $this->objectStore->writeObject($urn, $stream, $mimetype);
 	}
 
diff --git a/tests/lib/Files/ObjectStore/FailWriteObjectStore.php b/tests/lib/Files/ObjectStore/FailWriteObjectStore.php
index 559d004cd0c..bcb9ef68890 100644
--- a/tests/lib/Files/ObjectStore/FailWriteObjectStore.php
+++ b/tests/lib/Files/ObjectStore/FailWriteObjectStore.php
@@ -40,7 +40,7 @@ class FailWriteObjectStore implements IObjectStore {
 		return $this->objectStore->readObject($urn);
 	}
 
-	public function writeObject($urn, $stream, string $mimetype = null) {
+	public function writeObject($urn, $stream, ?string $mimetype = null) {
 		// emulate a failed write that didn't throw an error
 		return true;
 	}
diff --git a/tests/lib/Files/ObjectStore/S3Test.php b/tests/lib/Files/ObjectStore/S3Test.php
index c8333ca1ea3..7622f42676f 100644
--- a/tests/lib/Files/ObjectStore/S3Test.php
+++ b/tests/lib/Files/ObjectStore/S3Test.php
@@ -25,7 +25,7 @@ use Icewind\Streams\Wrapper;
 use OC\Files\ObjectStore\S3;
 
 class MultiPartUploadS3 extends S3 {
-	public function writeObject($urn, $stream, string $mimetype = null) {
+	public function writeObject($urn, $stream, ?string $mimetype = null) {
 		$this->getConnection()->upload($this->bucket, $urn, $stream, 'private', [
 			'mup_threshold' => 1,
 		]);