diff --git a/openerp/addons/base/ir/ir_cron.py b/openerp/addons/base/ir/ir_cron.py
index a49e059d526..6073489fa8a 100644
--- a/openerp/addons/base/ir/ir_cron.py
+++ b/openerp/addons/base/ir/ir_cron.py
@@ -44,6 +44,21 @@ _intervalTypes = {
     'minutes': lambda interval: relativedelta(minutes=interval),
 }
 
+JOB = {
+    'function': u'f',
+    'interval_type': u'minutes',
+    'user_id': 1,
+    'name': u'test',
+    'args': False,
+    'numbercall': 1,
+    'nextcall': datetime.now().strftime('%Y-%m-%d %H:%M:%S'),
+    'priority': 5,
+    'doall': True,
+    'active': True,
+    'interval_number': 1,
+    'model': u'ir.cron'
+}
+
 class ir_cron(osv.osv):
     """ This is the ORM object that periodically executes actions.
     """
@@ -240,6 +255,44 @@ class ir_cron(osv.osv):
             cr.commit()
             openerp.cron.schedule_in_advance(1, self.pool.db.dbname)
 
+    def _20_seconds(self, cr, uid):
+        print ">>> in _20_seconds"
+        time.sleep(20)
+        print ">>> out _20_seconds"
+
+    def _80_seconds(self, cr, uid):
+        print ">>> in _80_seconds"
+        time.sleep(80)
+        print ">>> out _80_seconds"
+
+    def test_0(self, cr, uid):
+        now = datetime.now()
+        t1 = (now + relativedelta(minutes=1)).strftime('%Y-%m-%d %H:%M:%S')
+        t2 = (now + relativedelta(minutes=1, seconds=5)).strftime('%Y-%m-%d %H:%M:%S')
+        t3 = (now + relativedelta(minutes=1, seconds=10)).strftime('%Y-%m-%d %H:%M:%S')
+        self.create(cr, uid, dict(JOB, name='test_0 _20_seconds A', function='_20_seconds', nextcall=t1))
+        self.create(cr, uid, dict(JOB, name='test_0 _20_seconds B', function='_20_seconds', nextcall=t2))
+        self.create(cr, uid, dict(JOB, name='test_0 _20_seconds C', function='_20_seconds', nextcall=t3))
+
+    def test_1(self, cr, uid):
+        now = datetime.now()
+        t1 = (now + relativedelta(minutes=1)).strftime('%Y-%m-%d %H:%M:%S')
+        self.create(cr, uid, dict(JOB, name='test_1 _20_seconds * 3', function='_20_seconds', nextcall=t1, numbercall=3))
+
+    def test_2(self, cr, uid):
+        now = datetime.now()
+        t1 = (now + relativedelta(minutes=1)).strftime('%Y-%m-%d %H:%M:%S')
+        self.create(cr, uid, dict(JOB, name='test_2 _80_seconds * 2', function='_80_seconds', nextcall=t1, numbercall=2))
+
+    def test_3(self, cr, uid):
+        now = datetime.now()
+        t1 = (now + relativedelta(minutes=1)).strftime('%Y-%m-%d %H:%M:%S')
+        t2 = (now + relativedelta(minutes=1, seconds=5)).strftime('%Y-%m-%d %H:%M:%S')
+        t3 = (now + relativedelta(minutes=1, seconds=10)).strftime('%Y-%m-%d %H:%M:%S')
+        self.create(cr, uid, dict(JOB, name='test_3 _80_seconds A', function='_80_seconds', nextcall=t1))
+        self.create(cr, uid, dict(JOB, name='test_3 _20_seconds B', function='_20_seconds', nextcall=t2))
+        self.create(cr, uid, dict(JOB, name='test_3 _20_seconds C', function='_20_seconds', nextcall=t3))
+
     def create(self, cr, uid, vals, context=None):
         res = super(ir_cron, self).create(cr, uid, vals, context=context)
         self.update_running_cron(cr)