diff --git a/src/classes/wishthis/User.php b/src/classes/wishthis/User.php
index 41d33daa..d100d157 100644
--- a/src/classes/wishthis/User.php
+++ b/src/classes/wishthis/User.php
@@ -315,7 +315,13 @@ class User
      */
     public function logIn(string $email = '', string $password = '', bool $user_login_is_persistent = false): bool
     {
-        global $database;
+        $database = new Database(
+            DATABASE_HOST,
+            DATABASE_NAME,
+            DATABASE_USER,
+            DATABASE_PASSWORD
+        );
+        $database->connect();
 
         $login_was_successful = false;
 
diff --git a/tests/LogInTest.php b/tests/LogInTest.php
new file mode 100644
index 00000000..5fd8dec8
--- /dev/null
+++ b/tests/LogInTest.php
@@ -0,0 +1,47 @@
+<?php
+
+declare(strict_types=1);
+
+namespace wishthis\Tests;
+
+use PHPUnit\Framework\TestCase;
+use wishthis\{Database, User};
+
+final class LogInTest extends TestCase
+{
+    public function testLogIn(): void
+    {
+        \define('DEFAULT_LOCALE', 'en_GB');
+        \define('ROOT', \dirname(__DIR__));
+
+        require __DIR__ . '/../src/classes/wishthis/User.php';
+        require __DIR__ . '/../src/classes/wishthis/Database.php';
+        require __DIR__ . '/../src/functions/gettext.php';
+        require __DIR__ . '/../src/config/config.php';
+
+        $user         = User::getCurrent();
+        $userEmpty    = new User();
+        $userEmail    = 'email@domain.tld';
+        $userPassword = '1234isnotarealpassword';
+
+        $this->assertEquals($user, $userEmpty);
+        $this->assertFalse($user->isLoggedIn());
+
+        $database = new Database(DATABASE_HOST, DATABASE_NAME, DATABASE_USER, DATABASE_PASSWORD);
+        $database->connect();
+        $database->query(
+            'REPLACE INTO `users`
+            (`email`, `password`) VALUES
+            (:userEmail, :userPassword)',
+            array(
+                'userEmail'    => $userEmail,
+                'userPassword' => $userPassword,
+            )
+        );
+
+        $userLoginSuccessful = $user->logIn($userEmail, $userPassword);
+
+        $this->assertTrue($userLoginSuccessful);
+        $this->assertEquals($userEmail, $_SESSION['user']->getEmail());
+    }
+}