diff --git a/tempest/tests/common/test_accounts.py b/tempest/tests/common/test_accounts.py
index a0b3496..cf7ce65 100644
--- a/tempest/tests/common/test_accounts.py
+++ b/tempest/tests/common/test_accounts.py
@@ -57,6 +57,7 @@
             'tempest.common.accounts.read_accounts_yaml',
             return_value=self.test_accounts))
         cfg.CONF.set_default('test_accounts_file', '', group='auth')
+        self.useFixture(mockpatch.Patch('os.path.isfile', return_value=True))
 
     def _get_hash_list(self, accounts_list):
         hash_list = []
@@ -220,6 +221,7 @@
             'tempest.common.accounts.read_accounts_yaml',
             return_value=self.test_accounts))
         cfg.CONF.set_default('test_accounts_file', '', group='auth')
+        self.useFixture(mockpatch.Patch('os.path.isfile', return_value=True))
 
     def test_get_creds(self):
         test_accounts_class = accounts.NotLockingAccounts('test_name')
@@ -229,4 +231,4 @@
             self.assertIsNotNone(creds, msg)
         self.assertRaises(exceptions.InvalidConfiguration,
                           test_accounts_class.get_creds,
-                          id=len(self.test_accounts))
\ No newline at end of file
+                          id=len(self.test_accounts))