diff --git a/.travis.yml b/.travis.yml
index c478db8c..485f041e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -13,6 +13,7 @@ addons:
   apt:
     packages:
       - expect-dev  # provides unbuffer utility
+      - wkhtmltopdf
 
 env:
   global:
diff --git a/pos_mail_receipt/tests/__init__.py b/pos_mail_receipt/tests/__init__.py
new file mode 100644
index 00000000..d9b96c4f
--- /dev/null
+++ b/pos_mail_receipt/tests/__init__.py
@@ -0,0 +1 @@
+from . import test_module
diff --git a/pos_mail_receipt/tests/test_module.py b/pos_mail_receipt/tests/test_module.py
new file mode 100644
index 00000000..6eb5b1c4
--- /dev/null
+++ b/pos_mail_receipt/tests/test_module.py
@@ -0,0 +1,104 @@
+# Copyright 2019 Akretion (https://www.akretion.com).
+# @author Pierrick Brun <pierrick.brun@akretion.com>
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+
+from odoo import fields
+from odoo.tests.common import TransactionCase
+
+
+class TestModule(TransactionCase):
+    def setUp(self):
+        super(TestModule, self).setUp()
+        self.PosOrder = self.env["pos.order"]
+        self.pos_product = self.env.ref("point_of_sale.whiteboard_pen")
+        self.pricelist = self.env.ref("product.list0")
+
+        # Create a new pos config and open it
+        self.pos_config = self.env.ref("point_of_sale.pos_config_main").copy()
+        self.pos_config.open_session_cb()
+
+    def test_mail_before_order(self):
+        order = self._create_order(email="test_mail@example.org.tst")
+        self.assertSent(order)
+
+    def test_mail_after_order(self):
+        order = self._create_order()
+        self.env["pos.order"].send_mail_receipt(
+            order.pos_reference,
+            "test_mail@example.org.tst",
+            "<p>Receipt's HTML</p>",
+            force=False,
+        )
+        self.assertSent(order)
+        self.env["pos.order"].send_mail_receipt(
+            order.pos_reference,
+            "test_mail@example.org.tst",
+            "<p>Receipt's HTML</p>",
+            force=False,
+        )
+        self.assertSent(order)
+
+    def assertSent(self, order):
+        mail = self.env["mail.mail"].search(
+            [("model", "=", "pos.order"), ("res_id", "=", order.id)]
+        )
+        self.assertEqual(1, len(mail))
+        self.assertEqual("test_mail@example.org.tst", mail.email_to)
+        self.assertEqual(1, len(mail.attachment_ids))
+
+    def _create_order(self, email=False):
+        # Create order
+        account = self.env.user.partner_id.property_account_receivable_id
+        statement_ids = self.pos_config.current_session_id.statement_ids
+        order_data = {
+            "id": u"0006-001-0010",
+            "to_invoice": False,
+            "data": {
+                "pricelist_id": self.pricelist.id,
+                "user_id": 1,
+                "name": "Order 0006-001-0010",
+                "partner_id": False,
+                "amount_paid": 0.9,
+                "pos_session_id": self.pos_config.current_session_id.id,
+                "lines": [
+                    [
+                        0,
+                        0,
+                        {
+                            "product_id": self.pos_product.id,
+                            "price_unit": self.pos_product.list_price,
+                            "qty": 10,
+                            "price_subtotal": 18.0,
+                            "price_subtotal_incl": 18.0,
+                        },
+                    ]
+                ],
+                "statement_ids": [
+                    [
+                        0,
+                        0,
+                        {
+                            "journal_id": self.pos_config.journal_ids[0].id,
+                            "amount": 18.0,
+                            "name": fields.Datetime.now(),
+                            "account_id": account.id,
+                            "statement_id": statement_ids[0].id,
+                        },
+                    ]
+                ],
+                "creation_date": u"2018-09-27 15:51:03",
+                "amount_tax": 0,
+                "fiscal_position_id": False,
+                "uid": u"00001-001-0001",
+                "amount_return": 0,
+                "sequence_number": 1,
+                "amount_total": 18.0,
+            },
+        }
+        if email:
+            order_data["data"]["email"] = email
+            order_data["data"]["body_from_ui"] = "<p>Receipt's HTML</p>"
+
+        result = self.PosOrder.create_from_ui([order_data])
+        order = self.PosOrder.browse(result[0])
+        return order