diff --git a/pymysql/cursors.py b/pymysql/cursors.py
index ff00d7b..18b6a25 100644
--- a/pymysql/cursors.py
+++ b/pymysql/cursors.py
@@ -12,7 +12,7 @@ from . import err
 #: Regular expression for :meth:`Cursor.executemany`.
 #: executemany only suports simple bulk insert.
 #: You can use it to load large dataset.
-RE_INSERT_VALUES = re.compile(r"""(INSERT\s.+\sVALUES\s+)(\(\s*%s\s*(?:,\s*%s\s*)*\))(\s*(?:ON DUPLICATE.*)?)\Z""",
+RE_INSERT_VALUES = re.compile(r"""(INSERT\s.+\sVALUES\s+)(\(\s*(?:%s|%\(.+\)s)\s*(?:,\s*(?:%s|%\(.+\)s)\s*)*\))(\s*(?:ON DUPLICATE.*)?)\Z""",
                               re.IGNORECASE | re.DOTALL)
 
 
diff --git a/pymysql/tests/test_cursor.py b/pymysql/tests/test_cursor.py
index f900774..34bcaa6 100644
--- a/pymysql/tests/test_cursor.py
+++ b/pymysql/tests/test_cursor.py
@@ -69,3 +69,33 @@ class CursorTest(base.PyMySQLTestCase):
         )
         self.assertIsNone(c2.fetchone())
 
+    def test_executemany(self):
+        conn = self.test_connection
+        cursor = conn.cursor(pymysql.cursors.Cursor)
+
+        m = pymysql.cursors.RE_INSERT_VALUES.match("INSERT INTO TEST (ID, NAME) VALUES (%s, %s)")
+        self.assertIsNotNone(m, 'error parse %s')
+        self.assertEqual(m.group(3), '', 'group 3 not blank, bug in RE_INSERT_VALUES?')
+
+        m = pymysql.cursors.RE_INSERT_VALUES.match("INSERT INTO TEST (ID, NAME) VALUES (%(id)s, %(name)s)")
+        self.assertIsNotNone(m, 'error parse %(name)s')
+        self.assertEqual(m.group(3), '', 'group 3 not blank, bug in RE_INSERT_VALUES?')
+
+        m = pymysql.cursors.RE_INSERT_VALUES.match("INSERT INTO TEST (ID, NAME) VALUES (%(id_name)s, %(name)s)")
+        self.assertIsNotNone(m, 'error parse %(id_name)s')
+        self.assertEqual(m.group(3), '', 'group 3 not blank, bug in RE_INSERT_VALUES?')
+
+        m = pymysql.cursors.RE_INSERT_VALUES.match("INSERT INTO TEST (ID, NAME) VALUES (%(id_name)s, %(name)s) ON duplicate update")
+        self.assertIsNotNone(m, 'error parse %(id_name)s')
+        self.assertEqual(m.group(3), ' ON duplicate update', 'group 3 not ON duplicate update, bug in RE_INSERT_VALUES?')
+
+        # cursor._executed myst bee "insert into test (data) values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9)"
+        # list args
+        data = xrange(10)
+        cursor.executemany("insert into test (data) values (%s)", data)
+        self.assertTrue(cursor._executed.endswith(",(7),(8),(9)"), 'execute many with %s not in one query')
+
+        # dict args
+        data_dict = [{'data': i} for i in xrange(10)]
+        cursor.executemany("insert into test (data) values (%(data)s)", data_dict)
+        self.assertTrue(cursor._executed.endswith(",(7),(8),(9)"), 'execute many with %(data)s not in one query')