update test

emilykl · emilykl · commit 04ca34cce51e · 2026-08-06T19:33:39.000-04:00
diff --git a/tests/test_core/test_offline/test_offline.py b/tests/test_core/test_offline/test_offline.py
@@ -108,7 +108,7 @@ def test_default_plot_generates_expected_html(self):
         self.assertIn(plotly_config_script, html)  # so is config
         self.assertIn(PLOTLYJS, html)  # and the source code
         # and it's an <html> doc
-        self.assertTrue(html.startswith("<html>") and html.endswith("</html>"))
+        self.assertTrue(html.startswith("<!doctype html>") and html.endswith("</html>"))
 
     def test_including_plotlyjs_truthy_html(self):
         # For backwards compatibility all truthy values that aren't otherwise
diff --git a/tests/test_optional/test_offline/test_offline.py b/tests/test_optional/test_offline/test_offline.py
@@ -88,4 +88,4 @@ def test_default_mpl_plot_generates_expected_html(self):
             self.assertTrue(data_json in html)  # data is in there
             self.assertTrue(PLOTLYJS in html)  # and the source code
             # and it's an <html> doc
-            self.assertTrue(html.startswith("<html>") and html.endswith("</html>"))
+            self.assertTrue(html.startswith("<!doctype html>") and html.endswith("</html>"))
