Issue a warning when an HTML parser is used to parse a document that

  looks like XML but not XHTML. [bug=1939121]

1 files changed, 4 insertions, 2 deletions

diff --git a/bs4/tests/test_htmlparser.py b/bs4/tests/test_htmlparser.py
index 5912cf5..bfcfa1f 100644
--- a/bs4/tests/test_htmlparser.py
+++ b/bs4/tests/test_htmlparser.py
@@ -4,7 +4,10 @@ trees."""
 from pdb import set_trace
 import pickle
 import warnings
-from bs4.builder import HTMLParserTreeBuilder
+from bs4.builder import (
+    HTMLParserTreeBuilder,
+    XMLParsedAsHTMLWarning,
+)
 from bs4.builder._htmlparser import BeautifulSoupHTMLParser
 from . import SoupTest, HTMLTreeBuilderSmokeTest
 
@@ -120,7 +123,6 @@ class TestHTMLParserTreeBuilder(SoupTest, HTMLTreeBuilderSmokeTest):
             expect = b"<div>%s</div>" % output_element
             assert with_element == expect
 
-
 class TestHTMLParserSubclass(SoupTest):
     def test_error(self):
         """Verify that our HTMLParser subclass implements error() in a way