diff --git a/build/psalm-baseline.xml b/build/psalm-baseline.xml
index f1107ecb4a11b..6a23822755919 100644
--- a/build/psalm-baseline.xml
+++ b/build/psalm-baseline.xml
@@ -4103,12 +4103,6 @@
     </TypeDoesNotContainNull>
   </file>
   <file src="lib/private/Group/Group.php">
-    <InvalidArgument>
-      <code><![CDATA[bool]]></code>
-    </InvalidArgument>
-    <InvalidOperand>
-      <code><![CDATA[$hide]]></code>
-    </InvalidOperand>
     <LessSpecificReturnStatement>
       <code><![CDATA[$users]]></code>
     </LessSpecificReturnStatement>
diff --git a/lib/private/Group/Group.php b/lib/private/Group/Group.php
index 147c5baf5438a..6e42fad8b9f6b 100644
--- a/lib/private/Group/Group.php
+++ b/lib/private/Group/Group.php
@@ -377,7 +377,7 @@ public function canAddUser(): bool {
 	 */
 	public function hideFromCollaboration(): bool {
 		return array_reduce($this->backends, function (bool $hide, GroupInterface $backend) {
-			return $hide | ($backend instanceof IHideFromCollaborationBackend && $backend->hideGroup($this->gid));
+			return $hide || ($backend instanceof IHideFromCollaborationBackend && $backend->hideGroup($this->gid));
 		}, false);
 	}
 }
diff --git a/tests/lib/Group/HideFromCollaborationTest.php b/tests/lib/Group/HideFromCollaborationTest.php
new file mode 100644
index 0000000000000..5ff7c79750835
--- /dev/null
+++ b/tests/lib/Group/HideFromCollaborationTest.php
@@ -0,0 +1,53 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace Test\Group;
+
+use OC\Group\Group;
+use OCP\EventDispatcher\IEventDispatcher;
+use OCP\Group\Backend\ABackend;
+use OCP\Group\Backend\IHideFromCollaborationBackend;
+use OCP\IUserManager;
+use PHPUnit\Framework\MockObject\MockObject;
+use Test\TestCase;
+
+abstract class HideFromCollaborationBackendTest extends ABackend implements IHideFromCollaborationBackend {
+
+}
+
+class HideFromCollaborationTest extends TestCase {
+
+	private IUserManager&MockObject $userManager;
+	private IEventDispatcher&MockObject $dispatcher;
+
+	protected function setUp(): void {
+		parent::setUp();
+
+		$this->userManager = $this->createMock(IUserManager::class);
+		$this->dispatcher = $this->createMock(IEventDispatcher::class);
+	}
+
+
+	public function testHideFromCollaboration(): void {
+		// Arrange
+		$backend1 = $this->createMock(HideFromCollaborationBackendTest::class);
+		$backend1->method('hideGroup')
+			->willReturn(false);
+		$backend2 = $this->createMock(HideFromCollaborationBackendTest::class);
+		$backend2->method('hideGroup')
+			->willReturn(true);
+		$group = new Group('group1', [$backend1, $backend2], $this->dispatcher, $this->userManager);
+
+		// Act
+		$result = $group->hideFromCollaboration();
+
+		// Assert
+		$this->assertTrue($result);
+	}
+}