diff --git a/.github/workflows/backend.yml b/.github/workflows/backend.yml
index af3b776..5e033cf 100644
--- a/.github/workflows/backend.yml
+++ b/.github/workflows/backend.yml
@@ -6,7 +6,7 @@ jobs:
   run:
     uses: flarum/framework/.github/workflows/REUSABLE_backend.yml@1.x
     with:
-      enable_backend_testing: false
+      enable_backend_testing: true
       enable_phpstan: true
       php_versions: '["8.0", "8.1", "8.2", "8.3"]'
 
diff --git a/.gitignore b/.gitignore
index 9f26f96..9123089 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@ js/dist
 js/node_modules
 vendor/
 composer.lock
+.phpunit.result.cache
diff --git a/composer.json b/composer.json
index 1530320..d7b30eb 100644
--- a/composer.json
+++ b/composer.json
@@ -61,7 +61,8 @@
         },
         "flarum-cli": {
             "modules": {
-                "githubActions": true
+                "githubActions": true,
+                "backendTesting": true
             }
         }
     },
@@ -76,13 +77,30 @@
     "require-dev": {
         "fof/split": "*",
         "flarum/flags": "*",
-        "flarum/phpstan": "*"
+        "flarum/phpstan": "*",
+        "flarum/testing": "^1.0.0"
     },
     "scripts": {
         "analyse:phpstan": "phpstan analyse",
-        "clear-cache:phpstan": "phpstan clear-result-cache"
+        "clear-cache:phpstan": "phpstan clear-result-cache",
+        "test": [
+            "@test:unit",
+            "@test:integration"
+        ],
+        "test:unit": "phpunit -c tests/phpunit.unit.xml",
+        "test:integration": "phpunit -c tests/phpunit.integration.xml",
+        "test:setup": "@php tests/integration/setup.php"
     },
     "scripts-descriptions": {
-        "analyse:phpstan": "Run static analysis"
+        "analyse:phpstan": "Run static analysis",
+        "test": "Runs all tests.",
+        "test:unit": "Runs all unit tests.",
+        "test:integration": "Runs all integration tests.",
+        "test:setup": "Sets up a database for use with integration tests. Execute this only once."
+    },
+    "autoload-dev": {
+        "psr-4": {
+            "FoF\\Byobu\\Tests\\": "tests/"
+        }
     }
 }
diff --git a/src/Listeners/SaveUserPreferences.php b/src/Listeners/SaveUserPreferences.php
index 13b0be6..57126fa 100644
--- a/src/Listeners/SaveUserPreferences.php
+++ b/src/Listeners/SaveUserPreferences.php
@@ -26,7 +26,7 @@ public function handle(Saving $event)
         if ($blocksPd !== null) {
             $actor->assertPermission($actor->id === $user->id);
 
-            $user->blocks_byobu_pd = (bool) $user->blocks_byobu_pd;
+            $user->blocks_byobu_pd = (bool) $blocksPd;
         }
     }
 }
diff --git a/tests/fixtures/.gitkeep b/tests/fixtures/.gitkeep
new file mode 100644
index 0000000..e69de29
diff --git a/tests/integration/api/UserPrivacyTest.php b/tests/integration/api/UserPrivacyTest.php
new file mode 100644
index 0000000..d5459f6
--- /dev/null
+++ b/tests/integration/api/UserPrivacyTest.php
@@ -0,0 +1,92 @@
+<?php
+
+/*
+ * This file is part of fof/byobu.
+ *
+ * Copyright (c) FriendsOfFlarum.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace FoF\Byobu\Tests\integration\api;
+
+use Flarum\Testing\integration\RetrievesAuthorizedUsers;
+use Flarum\Testing\integration\TestCase;
+
+class UserPrivacyTest extends TestCase
+{
+    use RetrievesAuthorizedUsers;
+
+    public function setUp(): void
+    {
+        parent::setUp();
+
+        $this->extension('fof-byobu');
+
+        $this->prepareDatabase([
+            'users' => [
+                $this->normalUser(),
+                ['id' => 3, 'username' => 'normal2', 'email' => 'normal2@machine.local', 'password' => 'too-obscure', 'blocks_byobu_pd' => true],
+            ],
+        ]);
+    }
+
+    /**
+     * @test
+     */
+    public function user_can_set_block_pd_setting()
+    {
+        $response = $this->send(
+            $this->request(
+                'PATCH',
+                '/api/users/2',
+                [
+                    'authenticatedAs' => 2,
+                    'json'            => [
+                        'data' => [
+                            'attributes' => [
+                                'blocksPd' => true,
+                            ],
+                        ],
+                    ],
+                ]
+            )
+        );
+
+        $this->assertEquals(200, $response->getStatusCode());
+
+        $json = json_decode($response->getBody()->getContents(), true);
+
+        $this->assertTrue($json['data']['attributes']['blocksPd']);
+    }
+
+    /**
+     * @test
+     */
+    public function user_can_disable_block_pd_setting()
+    {
+        $response = $this->send(
+            $this->request(
+                'PATCH',
+                '/api/users/3',
+                [
+                    'authenticatedAs' => 3,
+                    'json'            => [
+                        'data' => [
+                            'attributes' => [
+                                'blocksPd' => false,
+                            ],
+                        ],
+                    ],
+                ]
+            )
+        );
+
+        $this->assertEquals(200, $response->getStatusCode());
+
+        $json = json_decode($response->getBody()->getContents(), true);
+
+        $this->assertFalse($json['data']['attributes']['blocksPd']);
+    }
+}
diff --git a/tests/integration/setup.php b/tests/integration/setup.php
new file mode 100644
index 0000000..bf1c357
--- /dev/null
+++ b/tests/integration/setup.php
@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * This file is part of fof/byobu.
+ *
+ * Copyright (c) FriendsOfFlarum.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+use Flarum\Testing\integration\Setup\SetupScript;
+
+require __DIR__.'/../../vendor/autoload.php';
+
+$setup = new SetupScript();
+
+$setup->run();
diff --git a/tests/phpunit.integration.xml b/tests/phpunit.integration.xml
new file mode 100644
index 0000000..90fbbff
--- /dev/null
+++ b/tests/phpunit.integration.xml
@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd"
+    backupGlobals="false"
+    backupStaticAttributes="false"
+    colors="true"
+    convertErrorsToExceptions="true"
+    convertNoticesToExceptions="true"
+    convertWarningsToExceptions="true"
+    processIsolation="true"
+    stopOnFailure="false"
+>
+    <coverage processUncoveredFiles="true">
+        <include>
+            <directory suffix=".php">../src/</directory>
+        </include>
+    </coverage>
+    <testsuites>
+        <testsuite name="Flarum Integration Tests">
+            <directory suffix="Test.php">./integration</directory>
+             <exclude>./integration/tmp</exclude>
+        </testsuite>
+    </testsuites>
+</phpunit>
diff --git a/tests/phpunit.unit.xml b/tests/phpunit.unit.xml
new file mode 100644
index 0000000..d3a4a3e
--- /dev/null
+++ b/tests/phpunit.unit.xml
@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd"
+    backupGlobals="false"
+    backupStaticAttributes="false"
+    colors="true"
+    convertErrorsToExceptions="true"
+    convertNoticesToExceptions="true"
+    convertWarningsToExceptions="true"
+    processIsolation="false"
+    stopOnFailure="false"
+>
+    <coverage processUncoveredFiles="true">
+        <include>
+            <directory suffix=".php">../src/</directory>
+        </include>
+    </coverage>
+    <testsuites>
+        <testsuite name="Flarum Unit Tests">
+            <directory suffix="Test.php">./unit</directory>
+        </testsuite>
+    </testsuites>
+    <listeners>
+        <listener class="\Mockery\Adapter\Phpunit\TestListener" />
+    </listeners>
+</phpunit>
diff --git a/tests/unit/.gitkeep b/tests/unit/.gitkeep
new file mode 100644
index 0000000..e69de29