diff --git a/l10n_us_partner_zipcode/tests/__init__.py b/l10n_us_partner_zipcode/tests/__init__.py
new file mode 100644
index 00000000..6e4f00aa
--- /dev/null
+++ b/l10n_us_partner_zipcode/tests/__init__.py
@@ -0,0 +1 @@
+from . import test_res_partner_zipcode
diff --git a/l10n_us_partner_zipcode/tests/test_res_partner_zipcode.py b/l10n_us_partner_zipcode/tests/test_res_partner_zipcode.py
new file mode 100644
index 00000000..ec9c0d97
--- /dev/null
+++ b/l10n_us_partner_zipcode/tests/test_res_partner_zipcode.py
@@ -0,0 +1,31 @@
+from odoo import fields
+from odoo.tests.common import Form, TransactionCase
+
+
+class TestPartnerZip(TransactionCase):
+    def test_00_onchange_zip(self):
+        country_us = self.env['res.country'].search([('code', '=', 'US')], limit=1)
+        state_wa = self.env['res.country.state'].search([('code', '=', 'WA'),
+                                                         ('country_id', '=', country_us.id),
+                                                         ], limit=1)
+
+        f = Form(self.env['res.partner'])
+        self.assertFalse(f.city)
+        self.assertFalse(f.state_id)
+        self.assertFalse(f.country_id)
+        self.assertFalse(f.zip)
+        if hasattr(f, 'partner_latitude'):
+            self.assertFalse(f.partner_latitude)
+            self.assertFalse(f.partner_longitude)
+            self.assertFalse(f.date_localization)
+
+        f.zip = '98270'
+        f.name = 'Required Field'
+        p = f.save()
+        self.assertEqual(p.city, 'Marysville')
+        self.assertEqual(p.state_id, state_wa)
+        self.assertEqual(p.country_id, country_us)
+        if hasattr(p, 'partner_latitude'):
+            self.assertEqual(p.partner_latitude, 48.06)
+            self.assertEqual(p.partner_longitude, -122.16)
+            self.assertEqual(p.date_localization, fields.Date.context_today(p))