diff --git a/src/Typography/TextBlock.php b/src/Typography/TextBlock.php
index f83a7dc4..2eea0f13 100644
--- a/src/Typography/TextBlock.php
+++ b/src/Typography/TextBlock.php
@@ -23,6 +23,12 @@ class TextBlock extends Collection
         return $this->items;
     }
 
+    /**
+     * Get line by given key
+     *
+     * @param mixed $key
+     * @return null|Line
+     */
     public function line($key): ?Line
     {
         if (!array_key_exists($key, $this->lines())) {
diff --git a/tests/Colors/Hsl/ChannelTest.php b/tests/Colors/Hsl/ChannelTest.php
index 2c7f9c27..0b540efb 100644
--- a/tests/Colors/Hsl/ChannelTest.php
+++ b/tests/Colors/Hsl/ChannelTest.php
@@ -11,7 +11,7 @@ use Intervention\Image\Tests\TestCase;
 /**
  * @covers \Intervention\Image\Colors\Hsl\Channels\Hue
  * @covers \Intervention\Image\Colors\Hsl\Channels\Saturation
- * @covers \Intervention\Image\Colors\Hsl\Channels\Value
+ * @covers \Intervention\Image\Colors\Hsl\Channels\Luminance
  */
 class ChannelTest extends TestCase
 {
diff --git a/tests/OriginTest.php b/tests/OriginTest.php
index 9d9b2cdc..c3374ab9 100644
--- a/tests/OriginTest.php
+++ b/tests/OriginTest.php
@@ -13,6 +13,13 @@ class OriginTest extends TestCase
 
         $origin = new Origin('image/gif');
         $this->assertEquals('image/gif', $origin->mediaType());
+        $this->assertEquals('image/gif', $origin->mimetype());
+    }
+
+    public function testFilePath(): void
+    {
+        $origin = new Origin('image/jpeg', __DIR__ . '/tests/images/example.jpg');
+        $this->assertEquals(__DIR__ . '/tests/images/example.jpg', $origin->filePath());
     }
 
     public function testFileExtension(): void
diff --git a/tests/Typography/TextBlockTest.php b/tests/Typography/TextBlockTest.php
index 60f7cf35..4f8cad43 100644
--- a/tests/Typography/TextBlockTest.php
+++ b/tests/Typography/TextBlockTest.php
@@ -35,6 +35,7 @@ class TextBlockTest extends TestCase
         $this->assertEquals('foo', $block->line(0));
         $this->assertEquals('FooBar', $block->line(1));
         $this->assertEquals('bar', $block->line(2));
+        $this->assertNull($block->line(20));
     }
 
     public function testLongestLine(): void