diff --git a/tests/Fakes/Filter.php b/tests/Fakes/Filter.php
new file mode 100644
index 00000000..79961adc
--- /dev/null
+++ b/tests/Fakes/Filter.php
@@ -0,0 +1,42 @@
+<?php
+
+namespace Tests\Fakes;
+
+use App\Services\Filter as BaseFilter;
+use PHPUnit\Framework\Assert;
+
+class Filter extends BaseFilter
+{
+    protected $applied = [];
+
+    public function apply(string $hook, $init, $args = [])
+    {
+        $this->applied[$hook] = array_merge([$init], $args);
+
+        return parent::apply($hook, $init, $args);
+    }
+
+    public static function fake(): Filter
+    {
+        $fake = new self();
+
+        app()->instance(BaseFilter::class, $fake);
+
+        return $fake;
+    }
+
+    public function assertApplied(string $hook, $predicate = null)
+    {
+        Assert::assertArrayHasKey(
+            $hook, $this->applied,
+            "Expected Filter '$hook' was not applied."
+        );
+
+        if (!empty($predicate)) {
+            Assert::assertTrue(
+                call_user_func_array($predicate, $this->applied[$hook]),
+                "Arguments of Filter '$hook' does not satisfies the predicate."
+            );
+        }
+    }
+}
diff --git a/tests/HttpTest/ControllersTest/AdminControllerTest.php b/tests/HttpTest/ControllersTest/AdminControllerTest.php
index 5280d4a8..672ccb85 100644
--- a/tests/HttpTest/ControllersTest/AdminControllerTest.php
+++ b/tests/HttpTest/ControllersTest/AdminControllerTest.php
@@ -23,6 +23,14 @@ class AdminControllerTest extends TestCase
         $this->actAs('admin');
     }
 
+    public function testIndex()
+    {
+        $filter = Fakes\Filter::fake();
+
+        $this->get('/admin')->assertSuccessful();
+        $filter->assertApplied('grid:admin.index');
+    }
+
     public function testChartData()
     {
         factory(User::class)->create();
@@ -126,6 +134,7 @@ class AdminControllerTest extends TestCase
                     'a' => new Plugin('', ['title' => 'MyPlugin', 'version' => '0.0.0']),
                 ]));
         });
+        $filter = Fakes\Filter::fake();
 
         $this->get('/admin/status')
             ->assertSee(PHP_VERSION)
@@ -133,6 +142,7 @@ class AdminControllerTest extends TestCase
             ->assertSee('(1)')
             ->assertSee('MyPlugin')
             ->assertSee('0.0.0');
+        $filter->assertApplied('grid:admin.status');
     }
 
     public function testUsers()
diff --git a/tests/HttpTest/ControllersTest/ClosetControllerTest.php b/tests/HttpTest/ControllersTest/ClosetControllerTest.php
index 50fcf585..790572c0 100644
--- a/tests/HttpTest/ControllersTest/ClosetControllerTest.php
+++ b/tests/HttpTest/ControllersTest/ClosetControllerTest.php
@@ -24,7 +24,10 @@ class ClosetControllerTest extends TestCase
 
     public function testIndex()
     {
+        $filter = Fakes\Filter::fake();
+
         $this->get('/user/closet')->assertViewIs('user.closet');
+        $filter->assertApplied('grid:user.closet');
     }
 
     public function testGetClosetData()
diff --git a/tests/HttpTest/ControllersTest/PlayerControllerTest.php b/tests/HttpTest/ControllersTest/PlayerControllerTest.php
index 8845aff1..f29202b9 100644
--- a/tests/HttpTest/ControllersTest/PlayerControllerTest.php
+++ b/tests/HttpTest/ControllersTest/PlayerControllerTest.php
@@ -23,7 +23,10 @@ class PlayerControllerTest extends TestCase
 
     public function testIndex()
     {
+        $filter = Fakes\Filter::fake();
+
         $this->get('/user/player?pid=5')->assertViewIs('user.player');
+        $filter->assertApplied('grid:user.player');
     }
 
     public function testListAll()
diff --git a/tests/HttpTest/ControllersTest/SkinlibControllerTest.php b/tests/HttpTest/ControllersTest/SkinlibControllerTest.php
index 302253d3..c3770ce4 100644
--- a/tests/HttpTest/ControllersTest/SkinlibControllerTest.php
+++ b/tests/HttpTest/ControllersTest/SkinlibControllerTest.php
@@ -266,6 +266,7 @@ class SkinlibControllerTest extends TestCase
     public function testShow()
     {
         Storage::fake('textures');
+        $filter = Fakes\Filter::fake();
 
         // Cannot find texture
         $this->get('/skinlib/show/1')
@@ -287,6 +288,7 @@ class SkinlibControllerTest extends TestCase
         $texture = factory(Texture::class)->create();
         Storage::disk('textures')->put($texture->hash, '');
         $this->get('/skinlib/show/'.$texture->tid)->assertViewHas('texture');
+        $filter->assertApplied('grid:skinlib.show');
 
         // Guest should not see private texture
         $uploader = factory(User::class)->create();
@@ -360,7 +362,10 @@ class SkinlibControllerTest extends TestCase
 
     public function testUpload()
     {
+        $filter = Fakes\Filter::fake();
+
         $this->actAs('normal')->get('/skinlib/upload');
+        $filter->assertApplied('grid:skinlib.upload');
 
         option(['texture_name_regexp' => 'abc']);
         $this->get('/skinlib/upload')->assertViewHas('extra');
diff --git a/tests/HttpTest/ControllersTest/UserControllerTest.php b/tests/HttpTest/ControllersTest/UserControllerTest.php
index 9c240d61..793e8ccb 100644
--- a/tests/HttpTest/ControllersTest/UserControllerTest.php
+++ b/tests/HttpTest/ControllersTest/UserControllerTest.php
@@ -36,6 +36,8 @@ class UserControllerTest extends TestCase
 
     public function testIndex()
     {
+        $filter = Fakes\Filter::fake();
+
         $user = factory(User::class)->create();
         factory(\App\Models\Player::class)->create(['uid' => $user->uid]);
 
@@ -44,6 +46,7 @@ class UserControllerTest extends TestCase
             ->assertViewHas('statistics')
             ->assertSee((new Parsedown())->text(option_localized('announcement')))
             ->assertSee((string) $user->score);
+        $filter->assertApplied('grid:user.index');
 
         $unverified = factory(User::class)->create(['verified' => false]);
         $this->actingAs($unverified)
@@ -218,7 +221,10 @@ class UserControllerTest extends TestCase
 
     public function testProfile()
     {
+        $filter = Fakes\Filter::fake();
+
         $this->actAs('normal')->get('/user/profile')->assertViewIs('user.profile');
+        $filter->assertApplied('grid:user.profile');
     }
 
     public function testHandleProfile()