Fix related test issues with latest lxml

pyproject.toml

@@ -154,3 +154,8 @@ commands =
 filterwarnings =
     ignore:\nCSS selector pattern:UserWarning
 """
+
+[tool.pytest.ini_options]
+filterwarnings = [
+    "ignore:The 'strip_cdata':DeprecationWarning"
+]

tests/test_extra/test_soup_contains.py

@@ -304,6 +304,11 @@ def test_contains_warn(self):
                 ['2'],
                 flags=util.HTML
             )
+            found = False
+            target = "The pseudo class ':contains' is deprecated, ':-soup-contains' should be used moving forward."
+            for warn in w:
+                if target in str(warn.message):
+                    found = True
+                    break
             # Verify some things
-            self.assertTrue(len(w) == 1)
-            self.assertTrue(issubclass(w[-1].category, FutureWarning))
+            self.assertTrue(found)