1 files changed, 5 insertions, 0 deletions
diff --git a/bs4/testing.py b/bs4/testing.py
index 3e700f3..023a495 100644
--- a/bs4/testing.py
+++ b/bs4/testing.py
@@ -114,6 +114,11 @@ class HTMLTreeBuilderSmokeTest(object):
             soup.encode("utf-8").replace(b"\n", b""),
             markup.replace(b"\n", b""))
 
+    def test_processing_instruction(self):
+        markup = b"""<?PITarget PIContent?>"""
+        soup = self.soup(markup)
+        self.assertEqual(markup, soup.encode("utf8"))
+
     def test_deepcopy(self):
         """Make sure you can copy the tree builder.