diff --git a/.github/workflows/integration-sqlite.yml b/.github/workflows/integration-sqlite.yml
index b39698813a18d..b0cd3c9d728df 100644
--- a/.github/workflows/integration-sqlite.yml
+++ b/.github/workflows/integration-sqlite.yml
@@ -73,8 +73,10 @@ jobs:
           - 'sharing_features'
           - 'theming_features'
           - 'videoverification_features'
+          - 'guests_features'
 
         php-versions: ['8.4']
+        guests-versions: ['main']
         spreed-versions: ['main']
         activity-versions: ['master']
 
@@ -111,6 +113,15 @@ jobs:
           path: apps/spreed
           ref: ${{ matrix.spreed-versions }}
 
+      - name: Checkout Guests app
+        if: ${{ matrix.test-suite == 'guests_features' }}
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+          repository: nextcloud/guests
+          path: apps/guests
+          ref: ${{ matrix.guests-versions }}
+
       - name: Checkout Activity app
         if: ${{ matrix.test-suite == 'sharing_features' }}
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
diff --git a/build/integration/config/behat.yml b/build/integration/config/behat.yml
index 9d06553ba38ff..295eee5bcf430 100644
--- a/build/integration/config/behat.yml
+++ b/build/integration/config/behat.yml
@@ -193,6 +193,17 @@ default:
               - admin
             regular_user_password: 123456
         - TalkContext
+    guests:
+      paths:
+        - "%paths.base%/../guests_features"
+      contexts:
+        - GuestsContext
+        - SharingContext:
+            baseUrl: http://localhost:8080/ocs/
+            admin:
+              - admin
+              - admin
+            regular_user_password: 123456
     setup:
       paths:
         - "%paths.base%/../setup_features"
diff --git a/build/integration/features/bootstrap/GuestsContext.php b/build/integration/features/bootstrap/GuestsContext.php
new file mode 100644
index 0000000000000..134ab3f8b56f9
--- /dev/null
+++ b/build/integration/features/bootstrap/GuestsContext.php
@@ -0,0 +1,87 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2026 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+use Behat\Behat\Context\Context;
+
+class GuestsContext implements Context {
+	public const TEST_PASSWORD = '123456';
+	protected static $lastStdOut = null;
+	protected static $lastCode = null;
+
+	#[\Behat\Hook\BeforeScenario('@Guests')]
+	#[\Behat\Hook\BeforeFeature('@Guests')]
+	public static function skipTestsIfGuestsIsNotInstalled() {
+		if (!self::isGuestsInstalled()) {
+			throw new Exception('Guests needs to be installed to run features or scenarios tagged with @Guests');
+		}
+	}
+
+	#[\Behat\Hook\AfterScenario('@Guests')]
+	public static function disableGuests() {
+		self::runOcc(['app:disable', 'guests']);
+	}
+
+	private static function isGuestsInstalled(): bool {
+		self::runOcc(['app:list']);
+		return strpos(self::$lastStdOut, 'guests') !== false;
+	}
+
+	private static function runOcc(array $args, array $env = []): int {
+		// Based on "runOcc" from CommandLine trait (which can not be used due
+		// to not being static and being already used in other sibling
+		// contexts).
+		$args = array_map(function ($arg) {
+			return escapeshellarg($arg);
+		}, $args);
+		$args[] = '--no-ansi --no-warnings';
+		$args = implode(' ', $args);
+
+		$descriptor = [
+			0 => ['pipe', 'r'],
+			1 => ['pipe', 'w'],
+			2 => ['pipe', 'w'],
+		];
+		$process = proc_open('php console.php ' . $args, $descriptor, $pipes, $ocPath = '../..', $env);
+		self::$lastStdOut = stream_get_contents($pipes[1]);
+		self::$lastCode = proc_close($process);
+
+		return self::$lastCode;
+	}
+
+	#[\Behat\Step\Given('/^user "([^"]*)" is a guest account user$/')]
+	public function createGuestUser(string $email): void {
+		self::runOcc([
+			'user:delete',
+			$email,
+		]);
+
+		$lastCode = self::runOcc([
+			'config:app:set',
+			'guests',
+			'hash_user_ids',
+			'--value=false',
+			'--type=boolean',
+		]);
+		\PHPUnit\Framework\Assert::assertEquals(0, $lastCode);
+
+		$lastCode = self::runOcc([
+			'guests:add',
+			// creator user
+			'admin',
+			// email
+			$email,
+			'--display-name',
+			$email . '-displayname',
+			'--password-from-env',
+		], [
+			'OC_PASS' => self::TEST_PASSWORD,
+		]);
+		\PHPUnit\Framework\Assert::assertEquals(0, $lastCode, 'Guest creation succeeded for ' . $email);
+	}
+
+}
diff --git a/build/integration/guests_features/guest-filesystem.feature b/build/integration/guests_features/guest-filesystem.feature
new file mode 100644
index 0000000000000..9c94f70961967
--- /dev/null
+++ b/build/integration/guests_features/guest-filesystem.feature
@@ -0,0 +1,25 @@
+@Guests
+# SPDX-FileCopyrightText: 2026 Nextcloud GmbH and Nextcloud contributors
+# SPDX-License-Identifier: AGPL-3.0-or-later
+Feature: guests app
+  Background:
+    Given using api version "1"
+    Given using old dav path
+    Given invoking occ with "app:enable --force guests"
+    Given the command was successful
+    And user "user-guest@example.com" is a guest account user
+
+  Scenario: Receive a share as a guests app user
+    And user "user-guest@example.com" should see following elements
+      | / |
+    Given user "user0" exists
+    And As an "user0"
+    When creating a share with
+      | path | welcome.txt |
+      | shareType | 0 |
+      | shareWith | user-guest@example.com |
+    Then the OCS status code should be "100"
+    And the HTTP status code should be "200"
+    And user "user-guest@example.com" should see following elements
+      | / |
+      | /welcome.txt |