diff --git a/addons/sale/tests/test_sale_to_invoice.py b/addons/sale/tests/test_sale_to_invoice.py
index 45301e65e2f..d32f5a160ef 100644
--- a/addons/sale/tests/test_sale_to_invoice.py
+++ b/addons/sale/tests/test_sale_to_invoice.py
@@ -71,4 +71,4 @@ class TestSaleToInvoice(TestCommonSaleNoChart):
         assert order.invoice_ids, "No any invoice is created for this sales order"
         # Now I validate pay invoice wihth Test User(invoicing and payment).
         for invoice in order.invoice_ids:
-            invoice.with_context(context).invoice_validate()
+            invoice.with_context(context).action_invoice_open()
diff --git a/setup.cfg b/setup.cfg
index 3994ef225f2..4cce04e18da 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -9,7 +9,7 @@ requires =
   nodejs-less
   pychart
   pyparsing
-  python(abi) = 3.6
+  python(abi) >= 3.6
   python3-babel
   python3-decorator
   python3-docutils
diff --git a/setup/redhat/postinstall.sh b/setup/redhat/postinstall.sh
index 54b1b5cd56f..e6ee9106f7d 100644
--- a/setup/redhat/postinstall.sh
+++ b/setup/redhat/postinstall.sh
@@ -10,6 +10,12 @@ ODOO_LOG_DIR=/var/log/odoo
 ODOO_LOG_FILE=$ODOO_LOG_DIR/odoo-server.log
 ODOO_USER="odoo"
 
+if [ -d /usr/lib/python3.7 ]; then
+    SITE_PACK_DIR37=/usr/lib/python3.7/site-packages
+    [[ ! -d ${SITE_PACK_DIR37} ]] && mkdir -p ${SITE_PACK_DIR37}
+    ln -s /usr/lib/python3.6/site-packages/odoo ${SITE_PACK_DIR37}/odoo
+fi
+
 if ! getent passwd | grep -q "^odoo:"; then
     groupadd $ODOO_GROUP
     adduser --system --no-create-home $ODOO_USER -g $ODOO_GROUP