3 files changed, 4 insertions, 4 deletions
diff --git a/lib/private/Group/Database.php b/lib/private/Group/Database.php
index 13837eef552..c4915eefeae 100644
--- a/lib/private/Group/Database.php
+++ b/lib/private/Group/Database.php
@@ -73,7 +73,7 @@ class Database extends ABackend implements
 	 *
 	 * @param IDBConnection|null $dbConn
 	 */
-	public function __construct(IDBConnection $dbConn = null) {
+	public function __construct(?IDBConnection $dbConn = null) {
 		$this->dbConn = $dbConn;
 	}
 
diff --git a/lib/private/Group/Group.php b/lib/private/Group/Group.php
index 57289a4d3ac..d43a10b6a5c 100644
--- a/lib/private/Group/Group.php
+++ b/lib/private/Group/Group.php
@@ -76,7 +76,7 @@ class Group implements IGroup {
 	/** @var PublicEmitter */
 	private $emitter;
 
-	public function __construct(string $gid, array $backends, IEventDispatcher $dispatcher, IUserManager $userManager, PublicEmitter $emitter = null, ?string $displayName = null) {
+	public function __construct(string $gid, array $backends, IEventDispatcher $dispatcher, IUserManager $userManager, ?PublicEmitter $emitter = null, ?string $displayName = null) {
 		$this->gid = $gid;
 		$this->backends = $backends;
 		$this->dispatcher = $dispatcher;
@@ -302,7 +302,7 @@ class Group implements IGroup {
 	 * @return IUser[]
 	 * @deprecated 27.0.0 Use searchUsers instead (same implementation)
 	 */
-	public function searchDisplayName(string $search, int $limit = null, int $offset = null): array {
+	public function searchDisplayName(string $search, ?int $limit = null, ?int $offset = null): array {
 		return $this->searchUsers($search, $limit, $offset);
 	}
 
diff --git a/lib/private/Group/Manager.php b/lib/private/Group/Manager.php
index dafbe4295a4..2b6eb70502b 100644
--- a/lib/private/Group/Manager.php
+++ b/lib/private/Group/Manager.php
@@ -323,7 +323,7 @@ class Manager extends PublicEmitter implements IGroupManager {
 	 * @param IUser|null $user
 	 * @return \OC\Group\Group[]
 	 */
-	public function getUserGroups(IUser $user = null) {
+	public function getUserGroups(?IUser $user = null) {
 		if (!$user instanceof IUser) {
 			return [];
 		}