diff --git a/samples/client/petstore/python/tests/test_api_exception.py b/samples/client/petstore/python/tests/test_api_exception.py
index 8df2b681f01..d1f9dbaa6f2 100644
--- a/samples/client/petstore/python/tests/test_api_exception.py
+++ b/samples/client/petstore/python/tests/test_api_exception.py
@@ -9,12 +9,12 @@ $ nosetests -v
 
 import os
 import sys
-import time
 import unittest
 
 import petstore_api
 from petstore_api.rest import ApiException
 
+from .util import id_gen
 
 class ApiExceptionTests(unittest.TestCase):
 
@@ -25,22 +25,19 @@ class ApiExceptionTests(unittest.TestCase):
 
     def setUpModels(self):
         self.category = petstore_api.Category()
-        self.category.id = int(time.time())
+        self.category.id = id_gen()
         self.category.name = "dog"
         self.tag = petstore_api.Tag()
-        self.tag.id = int(time.time())
+        self.tag.id = id_gen()
         self.tag.name = "blank"
         self.pet = petstore_api.Pet()
-        self.pet.id = int(time.time())
+        self.pet.id = id_gen()
         self.pet.name = "hello kity"
         self.pet.photo_urls = ["http://foo.bar.com/1", "http://foo.bar.com/2"]
         self.pet.status = "sold"
         self.pet.category = self.category
         self.pet.tags = [self.tag]
 
-    def tearDown(self):
-        time.sleep(1)
-
     def test_404_error(self):
         self.pet_api.add_pet(body=self.pet)
         self.pet_api.delete_pet(pet_id=self.pet.id)
diff --git a/samples/client/petstore/python/tests/test_pet_api.py b/samples/client/petstore/python/tests/test_pet_api.py
index e2ed0ec267c..2f48ce8d335 100644
--- a/samples/client/petstore/python/tests/test_pet_api.py
+++ b/samples/client/petstore/python/tests/test_pet_api.py
@@ -8,14 +8,14 @@ $ nosetests -v
 """
 
 import os
-import time
 import unittest
 
 import petstore_api
 from petstore_api.rest import ApiException
 
-HOST = 'http://petstore.swagger.io/v2'
+from .util import id_gen
 
+HOST = 'http://petstore.swagger.io/v2'
 
 class PetApiTests(unittest.TestCase):
 
@@ -25,19 +25,15 @@ class PetApiTests(unittest.TestCase):
         self.setUpModels()
         self.setUpFiles()
 
-    def tearDown(self):
-        # sleep 1 sec between two every 2 tests
-        time.sleep(1)
-
     def setUpModels(self):
         self.category = petstore_api.Category()
-        self.category.id = int(time.time())
+        self.category.id = id_gen()
         self.category.name = "dog"
         self.tag = petstore_api.Tag()
-        self.tag.id = int(time.time())
+        self.tag.id = id_gen()
         self.tag.name = "swagger-codegen-python-pet-tag"
         self.pet = petstore_api.Pet()
-        self.pet.id = int(time.time())
+        self.pet.id = id_gen()
         self.pet.name = "hello kity"
         self.pet.photo_urls = ["http://foo.bar.com/1", "http://foo.bar.com/2"]
         self.pet.status = "sold"
diff --git a/samples/client/petstore/python/tests/util.py b/samples/client/petstore/python/tests/util.py
new file mode 100644
index 00000000000..6aeea16f63e
--- /dev/null
+++ b/samples/client/petstore/python/tests/util.py
@@ -0,0 +1,5 @@
+import random
+
+def id_gen(bits=32):
+    """ Returns a n-bit randomly generated int """
+    return int(random.getrandbits(bits))