diff --git a/addons/membership/models/partner.py b/addons/membership/models/partner.py
index 3078a39bc88..d8dd059a0b1 100644
--- a/addons/membership/models/partner.py
+++ b/addons/membership/models/partner.py
@@ -93,7 +93,7 @@ class Partner(models.Model):
                         state = 'old'
                         break
 
-            if partner.free_member and state is not 'paid':
+            if partner.free_member and state != 'paid':
                 state = 'free'
             partner.membership_state = state
 
diff --git a/odoo/addons/test_limits/models.py b/odoo/addons/test_limits/models.py
index c443c9ed1c9..fe659c863fb 100644
--- a/odoo/addons/test_limits/models.py
+++ b/odoo/addons/test_limits/models.py
@@ -36,10 +36,10 @@ class m(models.Model):
 
     @api.model
     def consume_cpu_time(self, seconds):
-        t0 = time.clock()
-        t1 = time.clock()
+        t0 = time.process_time()
+        t1 = time.process_time()
         while t1 - t0 < seconds:
             for i in range(10000000):
                 x = i * i
-            t1 = time.clock()
+            t1 = time.process_time()
         return True
diff --git a/odoo/fields.py b/odoo/fields.py
index be1a765afed..a18e1f9fea6 100644
--- a/odoo/fields.py
+++ b/odoo/fields.py
@@ -3576,9 +3576,9 @@ class Id(Field):
         # the code below is written to make record.id as quick as possible
         ids = record._ids
         size = len(ids)
-        if size is 0:
+        if size == 0:
             return False
-        elif size is 1:
+        elif size == 1:
             return ids[0]
         raise ValueError("Expected singleton: %s" % record)