diff --git a/tests/HTMLawedTest.php b/tests/HTMLawedTest.php
index 3b67e1c..094d11a 100644
--- a/tests/HTMLawedTest.php
+++ b/tests/HTMLawedTest.php
@@ -34,4 +34,12 @@ public function testImgSrcsetAttribute($input, $expectedOutput = null)
 
         $this->assertSame($expectedOutput ?: $input, $output);
     }
+
+    public function testPictureBlocks()
+    {
+        $input = '<div><picture><source srcset="a.jpg, c.jpg 405w" /><img src="z.jpg" alt="image" /></picture></div>';
+
+        $output = htmLawed($input);
+        $this->assertSame($input, $output);
+    }
 }