diff --git a/Lib/test/test_htmlparser.py b/Lib/test/test_htmlparser.py
--- a/Lib/test/test_htmlparser.py
+++ b/Lib/test/test_htmlparser.py
@@ -402,6 +402,23 @@
 
         self._run_check(html, expected, collector=self.get_collector())
 
+    def test_adjacent_attributes(self):
+        self._run_check('<a width="100%"cellspacing=0>',
+                        [("starttag", "a",
+                            [("width", "100%"), ("cellspacing","0")])],
+                        collector=self.get_collector())
+
+    def test_missing_attribute_value(self):
+        self._run_check('<a v=>',
+                        [("starttag", "a", [("v", "")])],
+                        collector=self.get_collector())
+
+    def test_javascript_attribute_value(self):
+        self._run_check("<a href=javascript:popup('/popup/help.html')>",
+                        [("starttag", "a",
+                            [("href", "javascript:popup('/popup/help.html')")])],
+                        collector=self.get_collector())
+
     def test_comma_between_attributes(self):
         self._run_check('<form action="/xxx.php?a=1&amp;b=2&amp", '
                         'method="post">', [