diff --git a/addons/account_qr_code_sepa/tests/test_sepa_qr.py b/addons/account_qr_code_sepa/tests/test_sepa_qr.py
index 785361500c1..1613e60566a 100644
--- a/addons/account_qr_code_sepa/tests/test_sepa_qr.py
+++ b/addons/account_qr_code_sepa/tests/test_sepa_qr.py
@@ -25,6 +25,8 @@ class TestSEPAQRCode(AccountTestInvoicingCommon):
             'partner_id': cls.company_data['company'].partner_id.id,
         })
 
+        cls.env.ref('base.EUR').active = True
+
         cls.sepa_qr_invoice = cls.env['account.move'].create({
             'move_type': 'out_invoice',
             'partner_id': cls.partner_a.id,
diff --git a/addons/crm/tests/test_crm_lead.py b/addons/crm/tests/test_crm_lead.py
index f4e32a50d90..e40059c4ead 100644
--- a/addons/crm/tests/test_crm_lead.py
+++ b/addons/crm/tests/test_crm_lead.py
@@ -246,6 +246,8 @@ class TestCRMLead(TestCrmCommon):
 
     @users('user_sales_manager')
     def test_crm_lead_currency_sync(self):
+        self.company_main.currency_id = self.env.ref('base.EUR')
+
         lead = self.env['crm.lead'].create({
             'name': 'Lead 1',
             'company_id': self.company_main.id
@@ -255,8 +257,6 @@ class TestCRMLead(TestCrmCommon):
         self.company_main.currency_id = self.env.ref('base.CHF')
         lead.with_company(self.company_main).update({'company_id': False})
         self.assertEqual(lead.company_currency, self.env.ref('base.CHF'))
-        #set back original currency
-        self.company_main.currency_id = self.env.ref('base.EUR')
 
     @users('user_sales_manager')
     def test_crm_lead_date_closed(self):
diff --git a/addons/delivery/tests/test_delivery_cost.py b/addons/delivery/tests/test_delivery_cost.py
index a242560df24..569b99cfdb2 100644
--- a/addons/delivery/tests/test_delivery_cost.py
+++ b/addons/delivery/tests/test_delivery_cost.py
@@ -272,6 +272,8 @@ class TestDeliveryCost(common.TransactionCase):
         self.normal_delivery.product_id.taxes_id = tax_price_include
 
         # Create sales order
+        # Required to see `pricelist_id` in the view
+        self.env.user.groups_id += self.env.ref('product.group_product_pricelist')
         order_form = Form(self.env['sale.order'].with_context(tracking_disable=True))
         order_form.partner_id = self.partner_18
         order_form.pricelist_id = self.pricelist
diff --git a/addons/payment/__manifest__.py b/addons/payment/__manifest__.py
index a8ae13a2087..0a5b174bcad 100644
--- a/addons/payment/__manifest__.py
+++ b/addons/payment/__manifest__.py
@@ -26,9 +26,6 @@
         'wizards/payment_link_wizard_views.xml',
         'wizards/payment_onboarding_views.xml',
     ],
-    'demo': [
-        'data/payment_demo.xml',
-    ],
     'assets': {
         'web.assets_frontend': [
             'payment/static/src/scss/portal_payment.scss',
diff --git a/addons/payment/data/payment_demo.xml b/addons/payment/data/payment_demo.xml
deleted file mode 100644
index 479c5fa083d..00000000000
--- a/addons/payment/data/payment_demo.xml
+++ /dev/null
@@ -1,7 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<odoo>
-
-    <!-- Enable the EUR currency since it's the currency of the company. -->
-    <function model="res.currency" name="action_unarchive" eval="[[ref('base.EUR')]]"/>
-
-</odoo>
diff --git a/addons/product/tests/test_product_pricelist.py b/addons/product/tests/test_product_pricelist.py
index 2e249ee5d9c..57a0f9e84af 100644
--- a/addons/product/tests/test_product_pricelist.py
+++ b/addons/product/tests/test_product_pricelist.py
@@ -16,13 +16,6 @@ class TestProductPricelist(ProductCommon):
     def setUpClass(cls):
         super().setUpClass()
 
-        # Required for some of the tests below
-        # Breaks if run after account installation (and with demo data)
-        # as generic chart of accounts changes company currency to USD
-        # therefore the test must stay at_install until adapted to work with USD
-        # or according to current currency.
-        cls._use_currency('EUR')
-
         cls.category_5_id = cls.env['product.category'].create({
             'name': 'Office Furniture',
             'parent_id': cls.product_category.id
diff --git a/addons/sale/data/sale_demo.xml b/addons/sale/data/sale_demo.xml
index 3f5d78eac42..79ce4a16484 100644
--- a/addons/sale/data/sale_demo.xml
+++ b/addons/sale/data/sale_demo.xml
@@ -1,15 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <odoo noupdate="1">
 
-    <!-- Enable EUR currency since it's the currency on the company, pricelist and Sale Orders
-
-        If the currency is not enabled, you cannot pay the demo SO's with a payment link bc the currency
-        is disabled.
-    -->
-    <function model="res.currency" name="action_unarchive">
-        <value model="res.currency" search="[('id', '=', obj().env.ref('product.list0').currency_id.id), ('active', '=', False)]"/>
-    </function>
-
     <!-- We want to activate pay and sign by default for easier demoing. -->
     <record id="base.main_company" model="res.company">
         <field name="portal_confirmation_pay" eval="True"/>
diff --git a/addons/sale/tests/test_sale_prices.py b/addons/sale/tests/test_sale_prices.py
index a0ae71bf0d0..d0e0cdb2152 100644
--- a/addons/sale/tests/test_sale_prices.py
+++ b/addons/sale/tests/test_sale_prices.py
@@ -219,8 +219,8 @@ class TestSalePrices(SaleCommon):
         })
         self.env['res.currency.rate'].create({
             'name': fields.Date.today(),
-            'rate': 1.0,
-            'currency_id': self.env.company.currency_id.id,
+            'rate': 2.0,
+            'currency_id': other_currency.id,
             'company_id': self.env.company.id,
         })
         order_in_other_currency = self.env['sale.order'].create({
@@ -234,7 +234,8 @@ class TestSalePrices(SaleCommon):
                 }),
             ]
         })
-        self.assertEqual(order_in_other_currency.amount_total, 480.0)
+        # 20.0 (product price) * 24.0 (2 dozens) * 2.0 (price rate USD -> EUR)
+        self.assertEqual(order_in_other_currency.amount_total, 960.0)
 
     def test_negative_discounts(self):
         """aka surcharges"""
diff --git a/addons/test_sale_product_configurators/tests/test_sale_product_configurator.py b/addons/test_sale_product_configurators/tests/test_sale_product_configurator.py
index 87d6f5ee885..9d1d26259f3 100644
--- a/addons/test_sale_product_configurators/tests/test_sale_product_configurator.py
+++ b/addons/test_sale_product_configurators/tests/test_sale_product_configurator.py
@@ -133,6 +133,11 @@ class TestProductConfiguratorUi(HttpCase, TestProductConfiguratorCommon):
         Also testing B2C setting: no impact on the backend configurator.
         """
 
+        # Required to see `pricelist_id` in the view
+        self.salesman.write({
+            'groups_id': [(4, self.env.ref('product.group_product_pricelist').id)],
+        })
+
         # Add a 15% tax on desk
         tax = self.env['account.tax'].create({'name': "Test tax", 'amount': 15})
         self.product_product_custo_desk.taxes_id = tax
diff --git a/odoo/addons/base/__manifest__.py b/odoo/addons/base/__manifest__.py
index c87d083e88a..cd1d041658b 100644
--- a/odoo/addons/base/__manifest__.py
+++ b/odoo/addons/base/__manifest__.py
@@ -78,6 +78,7 @@ The kernel of Odoo, needed for all installation.
     'demo': [
         'data/res_users_demo.xml',
         'data/res_partner_bank_demo.xml',
+        'data/res_currency_demo.xml',
         'data/res_currency_rate_demo.xml',
         'data/res_bank_demo.xml',
         'data/res_partner_demo.xml',
diff --git a/odoo/addons/base/data/base_data.sql b/odoo/addons/base/data/base_data.sql
index 419e3891093..25d0cc7443c 100644
--- a/odoo/addons/base/data/base_data.sql
+++ b/odoo/addons/base/data/base_data.sql
@@ -119,8 +119,8 @@ CREATE TABLE res_partner (
 ---------------------------------
 -- Default data
 ---------------------------------
-insert into res_currency (id, name, symbol) VALUES (1, 'EUR', '€');
-insert into ir_model_data (name, module, model, noupdate, res_id) VALUES ('EUR', 'base', 'res.currency', true, 1);
+insert into res_currency (id, name, symbol) VALUES (1, 'USD', '$');
+insert into ir_model_data (name, module, model, noupdate, res_id) VALUES ('USD', 'base', 'res.currency', true, 1);
 select setval('res_currency_id_seq', 1);
 
 insert into res_company (id, name, partner_id, currency_id, create_date) VALUES (1, 'My Company', 1, 1, now() at time zone 'UTC');
diff --git a/odoo/addons/base/data/res_company_data.xml b/odoo/addons/base/data/res_company_data.xml
index d794d70464c..b37f3d22b45 100644
--- a/odoo/addons/base/data/res_company_data.xml
+++ b/odoo/addons/base/data/res_company_data.xml
@@ -4,7 +4,7 @@
         <record id="main_company" model="res.company">
             <field name="name">My Company</field>
             <field name="partner_id" ref="main_partner"/>
-            <field name="currency_id" ref="base.EUR"/>
+            <field name="currency_id" ref="base.USD"/>
             <field name="favicon" model="res.company" eval="obj()._get_default_favicon(original=True)"/>
         </record>
     </data> 
diff --git a/odoo/addons/base/data/res_currency_demo.xml b/odoo/addons/base/data/res_currency_demo.xml
new file mode 100644
index 00000000000..e7ffa3d207d
--- /dev/null
+++ b/odoo/addons/base/data/res_currency_demo.xml
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+    <data noupdate="1">
+
+        <!--
+            In demo only, enable the USD currency.
+            The rationale is that, without demo, you shouldn't enable any currency by default,
+            so you do not land in a multi-currency database by default.
+            e.g. if USD was enabled by default even without demo, and you install the accounting for Belgium,
+            installing the Belgian Chart Of Account, it would enable the EUR currency,
+            therefore leaving you with the USD and EUR currency enabled,
+            and therefore in a multi-currency environment.
+            But, with demo, you need to enable the currency used by the company by default,
+            so the monetary fields display the currency symbol even when invoicing (account) is not installed.
+            e.g. install a demo database with just CRM, you want the $ to appear next to the expected revenue field.
+        -->
+        <record id="USD" model="res.currency">
+            <field name="active" eval="True"/>
+        </record>
+
+    </data>
+</odoo>
diff --git a/odoo/addons/base/data/res_currency_rate_demo.xml b/odoo/addons/base/data/res_currency_rate_demo.xml
index 7ceb095b95b..d0b54932972 100644
--- a/odoo/addons/base/data/res_currency_rate_demo.xml
+++ b/odoo/addons/base/data/res_currency_rate_demo.xml
@@ -1,19 +1,12 @@
 <?xml version="1.0" encoding="utf-8"?>
 <odoo>
     <data noupdate="1">
-        <!-- The Following currency rates are considered as on 1st Jan,2010 against EUR. -->
         <record forcecreate="0" id="rateUSD" model="res.currency.rate">
-            <field name="rate">1.2834</field>
+            <field name="rate">1.0</field>
             <field name="currency_id" ref="USD"/>
             <field name="name">2010-01-01</field>
         </record>
 
-        <record id="rateUSDbis" model="res.currency.rate">
-            <field name="rate">1.5289</field>
-            <field name="currency_id" ref="USD"/>
-            <field eval="time.strftime('%Y-01-01')" name="name"/>
-        </record>
-
         <record forcecreate="0" id="rateVEF" model="res.currency.rate">
             <field name="rate">5.864</field>
             <field name="currency_id" ref="VEF"/>
@@ -748,7 +741,7 @@
         <record forcecreate="0" id="rateEUR" model="res.currency.rate">
             <field name="currency_id" ref="EUR" />
             <field name="name">2010-01-01</field>
-            <field name="rate">1.0</field>
+            <field name="rate">1.2834</field>
         </record>
 
         <record forcecreate="0" id="rateVUV" model="res.currency.rate">
diff --git a/odoo/addons/base/tests/common.py b/odoo/addons/base/tests/common.py
index 3f85b96944a..c324261b49a 100644
--- a/odoo/addons/base/tests/common.py
+++ b/odoo/addons/base/tests/common.py
@@ -22,9 +22,6 @@ class BaseCommon(TransactionCase):
     def setUpClass(cls):
         super().setUpClass()
 
-        # Enforce the use of USD as main currency unless modified in inherited class(es)
-        cls._use_currency('USD')
-
         # Mail logic won't be tested by default in other modules.
         # Mail API overrides should be tested with dedicated tests on purpose
         # Hack to use with_context and avoid manual context dict modification
@@ -34,17 +31,6 @@ class BaseCommon(TransactionCase):
             'name': 'Test Partner',
         })
 
-    @classmethod
-    def _use_currency(cls, currency_code):
-        # Enforce constant currency
-        currency = cls._enable_currency(currency_code)
-        if not cls.env.company.currency_id == currency:
-            cls.env.transaction.cache.set(cls.env.company, type(cls.env.company).currency_id, currency.id, dirty=True)
-            # this is equivalent to cls.env.company.currency_id = currency but without triggering buisness code checks.
-            # The value is added in cache, and the cache value is set as dirty so that that
-            # the value will be written to the database on next flush.
-            # this was needed because some journal entries may exist when running tests, especially l10n demo data.
-
     @classmethod
     def _enable_currency(cls, currency_code):
         currency = cls.env['res.currency'].with_context(active_test=False).search(