diff --git a/integration_tests/suite/base/test_phone_numbers.py b/integration_tests/suite/base/test_phone_numbers.py
index b59778753..cf829f54a 100644
--- a/integration_tests/suite/base/test_phone_numbers.py
+++ b/integration_tests/suite/base/test_phone_numbers.py
@@ -39,20 +39,36 @@ def test_delete_errors():
     s.check_resource_not_found(fake_phone_number, 'PhoneNumber')
 
 
-@fixtures.phone_number()
-def test_put_errors(phone_number):
+def test_put_not_found():
     fake_phone_number = confd.phone_numbers(FAKE_UUID).put
     s.check_resource_not_found(fake_phone_number, 'PhoneNumber')
 
+
+@fixtures.phone_number()
+def test_put_bogus_fields(phone_number):
     url = confd.phone_numbers(phone_number['uuid']).put
     error_checks(url)
-    unique_error_checks_put(phone_number)
 
 
-def test_post_errors():
+@fixtures.phone_number()
+@fixtures.phone_number(number='+18005551234', main=True)
+def test_put_conflict(phone_number1, phone_number2):
+    phone_number1['number'] = phone_number2['number']
+    response = confd.phone_numbers(phone_number1['uuid']).put(**phone_number1)
+    response.assert_match(400, e.resource_exists(resource='PhoneNumber'))
+
+
+def test_post_bogus_fields():
     url = confd.phone_numbers.post
     error_checks(url)
-    unique_error_checks_post(url)
+
+
+@fixtures.phone_number(number='+18005551234', main=True)
+def test_post_conflict(main_number):
+    url = confd.phone_numbers.post
+
+    response = url(number=main_number['number'])
+    response.assert_match(400, e.resource_exists(resource='PhoneNumber'))
 
 
 def error_checks(url):
@@ -67,11 +83,6 @@ def error_checks(url):
     s.check_bogus_field_returns_error(url, 'caller_id_name', True)
     s.check_bogus_field_returns_error(url, 'caller_id_name', {})
     s.check_bogus_field_returns_error(url, 'caller_id_name', 'a' * 1024)
-    s.check_bogus_field_returns_error(url, 'main', 123)
-    s.check_bogus_field_returns_error(url, 'main', '42')
-    s.check_bogus_field_returns_error(url, 'main', None)
-    s.check_bogus_field_returns_error(url, 'main', [])
-    s.check_bogus_field_returns_error(url, 'main', {})
     s.check_bogus_field_returns_error(url, 'shared', 123)
     s.check_bogus_field_returns_error(url, 'shared', '42')
     s.check_bogus_field_returns_error(url, 'shared', None)
@@ -79,27 +90,6 @@ def error_checks(url):
     s.check_bogus_field_returns_error(url, 'shared', {})
 
 
-@fixtures.phone_number(number='+18005551234', main=True)
-def unique_error_checks_put(first, second):
-    first['main'] = True
-    response = confd.phone_numbers(first['uuid']).put(**first)
-    response.assert_match(400, e.resource_exists(resource='PhoneNumber'))
-
-    first['main'] = False
-    first['number'] = second['number']
-    response = confd.phone_numbers(first['uuid']).put(**first)
-    response.assert_match(400, e.resource_exists(resource='PhoneNumber'))
-
-
-@fixtures.phone_number(number='+18005551234', main=True)
-def unique_error_checks_post(url, existing):
-    response = url(number='+15551234567', main=True)
-    response.assert_match(400, e.resource_exists(resource='PhoneNumber'))
-
-    response = url(number=existing['number'])
-    response.assert_match(400, e.resource_exists(resource='PhoneNumber'))
-
-
 @fixtures.phone_number(
     number='+18001235555', main=True, shared=True, caller_id_name='search'
 )
@@ -205,7 +195,6 @@ def test_create_all_parameters():
     parameters = {
         'number': '+18001235567',
         'caller_id_name': 'Here',
-        'main': True,
         'shared': True,
     }
 
@@ -436,7 +425,6 @@ def test_edit_all_parameters(phone_number):
     parameters = {
         'number': '+18001235567',
         'caller_id_name': 'Here',
-        'main': True,
         'shared': True,
     }
 
diff --git a/integration_tests/suite/helpers/helpers/phone_number.py b/integration_tests/suite/helpers/helpers/phone_number.py
index fcfbf9075..55fc114d6 100644
--- a/integration_tests/suite/helpers/helpers/phone_number.py
+++ b/integration_tests/suite/helpers/helpers/phone_number.py
@@ -29,7 +29,13 @@ def delete_phone_number(phone_number_uuid, check=False, **parameters):
 
 def add_phone_number(wazo_tenant=None, **parameters):
     response = confd.phone_numbers.post(parameters, wazo_tenant=wazo_tenant)
-    return response.item
+    if parameters.get('main', False):
+        main_response = confd.phone_numbers.main.put(
+            {'phone_number_uuid': response.item['uuid']}, wazo_tenant=wazo_tenant
+        )
+        main_response.assert_updated()
+
+    return confd.phone_numbers(response.item['uuid']).get().item
 
 
 def _random_number(length):
diff --git a/wazo_confd/plugins/phone_number/schema.py b/wazo_confd/plugins/phone_number/schema.py
index 1207a03c2..55aaa9a37 100644
--- a/wazo_confd/plugins/phone_number/schema.py
+++ b/wazo_confd/plugins/phone_number/schema.py
@@ -25,7 +25,7 @@ class PhoneNumberSchema(BaseSchema):
     tenant_uuid = fields.String(dump_only=True)
     number = number_field(required=True)
     caller_id_name = fields.String(validate=Length(min=1, max=256), allow_none=True)
-    main = StrictBoolean(default=False)
+    main = StrictBoolean(dump_only=True)
     shared = StrictBoolean(default=False)
     links = ListLink(Link('phone_numbers', field='uuid'))