--- a/hgext/pushlog/__init__.py
+++ b/hgext/pushlog/__init__.py
@@ -387,22 +387,25 @@ class pushlog(object):
         there is no pushlog info for this node.
 
         Argument is specified as binary node.
         """
         with self.conn(readonly=True) as c:
             if not c:
                 return None
 
-            res = c.execute('SELECT pushid from changesets WHERE node=?',
-                            (hex(node),)).fetchone()
-            if not res:
-                return None
+            return self._push_from_node(c, node)
 
-            return self.pushfromid(c, res[0])
+    def _push_from_node(self, conn, node):
+        res = conn.execute('SELECT pushid from changesets WHERE node=?',
+                           (hex(node),)).fetchone()
+        if not res:
+            return None
+
+        return self.pushfromid(conn, res[0])
 
     def pushfromchangeset(self, ctx):
         return self.pushfromnode(ctx.node())
 
     def pushfromid(self, conn, pushid):
         """Obtain a push from its numeric push id.
 
         Returns a Push namedtuple or None if there is no push with this push