diff --git a/src/Renderer/Twig/Extensions/Globals.php b/src/Renderer/Twig/Extensions/Globals.php
index 1b21d241..7be96d60 100644
--- a/src/Renderer/Twig/Extensions/Globals.php
+++ b/src/Renderer/Twig/Extensions/Globals.php
@@ -49,7 +49,7 @@ class Globals extends TwigExtension implements GlobalsInterface
         }
 
         if (array_key_exists($themeId, $themes) === false) {
-            $themeId = 1;
+            $themeId = array_key_first($themes);
         }
 
         $theme = $themes[$themeId];
diff --git a/tests/Unit/Renderer/Twig/Extensions/AssetsTest.php b/tests/Unit/Renderer/Twig/Extensions/AssetsTest.php
index 2d7ba6cd..dc186562 100644
--- a/tests/Unit/Renderer/Twig/Extensions/AssetsTest.php
+++ b/tests/Unit/Renderer/Twig/Extensions/AssetsTest.php
@@ -12,7 +12,7 @@ class AssetsTest extends ExtensionTest
      * @covers \Engelsystem\Renderer\Twig\Extensions\Assets::__construct
      * @covers \Engelsystem\Renderer\Twig\Extensions\Assets::getFunctions
      */
-    public function testGetGlobals()
+    public function testGetFunctions()
     {
         /** @var UrlGenerator|MockObject $urlGenerator */
         $urlGenerator = $this->createMock(UrlGenerator::class);
diff --git a/tests/Unit/Renderer/Twig/Extensions/GlobalsTest.php b/tests/Unit/Renderer/Twig/Extensions/GlobalsTest.php
index f471e804..66aabb0a 100644
--- a/tests/Unit/Renderer/Twig/Extensions/GlobalsTest.php
+++ b/tests/Unit/Renderer/Twig/Extensions/GlobalsTest.php
@@ -29,16 +29,18 @@ class GlobalsTest extends ExtensionTest
         $theme = ['name' => 'Testtheme', 'navbar_classes' => 'something'];
         $theme2 = ['name' => 'Bar'];
         $theme3 = ['name' => 'Lorem'];
+        /** @var User $user */
         $user = User::factory()
             ->has(Settings::factory(['theme' => 42]))
             ->create();
         $config = new Config(['theme' => 23, 'themes' => [42 => $theme, 23 => $theme2, 1337 => $theme3]]);
 
-        $auth->expects($this->exactly(3))
+        $auth->expects($this->exactly(4))
             ->method('user')
             ->willReturnOnConsecutiveCalls(
                 null,
                 $user,
+                $user,
                 null
             );
 
@@ -46,17 +48,25 @@ class GlobalsTest extends ExtensionTest
 
         $extension = new Globals($auth, $request);
 
+        // No user
         $globals = $extension->getGlobals();
         $this->assertGlobalsExists('user', [], $globals);
         $this->assertGlobalsExists('request', $request, $globals);
         $this->assertGlobalsExists('themeId', 23, $globals);
         $this->assertGlobalsExists('theme', $theme2, $globals);
 
+        // User
         $globals = $extension->getGlobals();
         $this->assertGlobalsExists('user', $user, $globals);
         $this->assertGlobalsExists('themeId', 42, $globals);
         $this->assertGlobalsExists('theme', $theme, $globals);
 
+        // User with not available theme configured
+        $user->settings->theme = 9999;
+        $globals = $extension->getGlobals();
+        $this->assertGlobalsExists('themeId', 42, $globals);
+
+        // Request query parameter
         $request->query->set('theme', 1337);
         $globals = $extension->getGlobals();
         $this->assertGlobalsExists('user', [], $globals);