diff --git a/app/Services/Minecraft.php b/app/Services/Minecraft.php
index 4b8b67b9..9fee615a 100644
--- a/app/Services/Minecraft.php
+++ b/app/Services/Minecraft.php
@@ -35,7 +35,7 @@ class Minecraft
      * Generate skin preview
      *
      * @link   https://github.com/NC22/Minecraft-HD-skin-viewer-2D/blob/master/SkinViewer2D.class.php
-     * @param  resource    $resource
+     * @param  string      $resource
      * @param  int         $size
      * @param  bool|string $side   'front' or 'back'
      * @param  bool        $base64 Generate image from base64 string
diff --git a/tests/ServicesTest/MinecraftTest.php b/tests/ServicesTest/MinecraftTest.php
new file mode 100644
index 00000000..86e98637
--- /dev/null
+++ b/tests/ServicesTest/MinecraftTest.php
@@ -0,0 +1,74 @@
+<?php
+
+use App\Services\Minecraft;
+use org\bovigo\vfs\vfsStream;
+use App\Http\Controllers\TextureController;
+use Illuminate\Foundation\Testing\WithoutMiddleware;
+use Illuminate\Foundation\Testing\DatabaseMigrations;
+use Illuminate\Foundation\Testing\DatabaseTransactions;
+
+class MinecraftTest extends TestCase
+{
+    protected function setUp()
+    {
+        parent::setUp();
+        vfsStream::setup();
+    }
+
+    public function testGenerateAvatarFromSkin()
+    {
+        imagepng(imagecreatetruecolor(64, 32), vfsStream::url('root/skin.png'));
+        $avatar = Minecraft::generateAvatarFromSkin(vfsStream::url('root/skin.png'), 50);
+        $this->assertEquals(50, imagesx($avatar));
+        $this->assertEquals(50, imagesy($avatar));
+
+        imagepng(imagecreatetruecolor(128, 64), vfsStream::url('root/skin.png'));
+        $avatar = Minecraft::generateAvatarFromSkin(vfsStream::url('root/skin.png'), 50);
+        $this->assertEquals(50, imagesx($avatar));
+        $this->assertEquals(50, imagesy($avatar));
+
+        $avatar = Minecraft::generateAvatarFromSkin(
+            TextureController::getDefaultSkin(),
+            50,
+            'f',
+            true
+        );
+        $this->assertEquals(50, imagesx($avatar));
+        $this->assertEquals(50, imagesy($avatar));
+    }
+
+    public function testGeneratePreviewFromSkin()
+    {
+        imagepng(imagecreatetruecolor(64, 32), vfsStream::url('root/skin.png'));
+        $preview = Minecraft::generatePreviewFromSkin(vfsStream::url('root/skin.png'), 50, true);
+        $this->assertEquals(25, imagesx($preview));
+        $this->assertEquals(50, imagesy($preview));
+
+        imagepng(imagecreatetruecolor(128, 64), vfsStream::url('root/skin.png'));
+        $preview = Minecraft::generatePreviewFromSkin(vfsStream::url('root/skin.png'), 50);
+        $this->assertEquals(56, imagesx($preview));
+        $this->assertEquals(50, imagesy($preview));
+
+        imagepng(imagecreatetruecolor(128, 128), vfsStream::url('root/skin.png'));
+        $preview = Minecraft::generatePreviewFromSkin(vfsStream::url('root/skin.png'), 50);
+        $this->assertEquals(56, imagesx($preview));
+        $this->assertEquals(50, imagesy($preview));
+
+        $preview = Minecraft::generatePreviewFromSkin(
+            TextureController::getDefaultSkin(),
+            50,
+            true,
+            true
+        );
+        $this->assertEquals(25, imagesx($preview));
+        $this->assertEquals(50, imagesy($preview));
+    }
+
+    public function testGeneratePreviewFromCape()
+    {
+        imagepng(imagecreatetruecolor(128, 64), vfsStream::url('root/cape.png'));
+        $preview = Minecraft::generatePreviewFromCape(vfsStream::url('root/cape.png'));
+        $this->assertEquals(250, imagesx($preview));
+        $this->assertEquals(166, imagesy($preview));
+    }
+}