diff --git a/.circleci/config.yml b/.circleci/config.yml
index 89c398ada7e267c2289edea8ab16a42a70ca2e47..5df6cbb2e1976830d4aae727dd18ae2d8b85116b 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -30,7 +30,7 @@ jobs:
       - run:
           name: install dependencies
           command: |
-            sudo python -m pip install --upgrade pip setuptools wheel
+            sudo python -m pip install --upgrade pip setuptools wheel mock pytest
             sudo python -m pip install -r requirements.txt
             sudo python -m pip install --upgrade pycodestyle pyflakes coverage tox codacy-coverage virtualenv
 
diff --git a/tests/beembase/test_bip38.py b/tests/beembase/test_bip38.py
index 13f1948e5c84bc254aa5fc85d0c1960af1737ec8..6d6390d76640655947936b0d3516b97f6cfacc7c 100644
--- a/tests/beembase/test_bip38.py
+++ b/tests/beembase/test_bip38.py
@@ -1,3 +1,7 @@
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+from __future__ import unicode_literals
 import unittest
 
 from beembase.account import PrivateKey
diff --git a/tests/beembase/test_memo.py b/tests/beembase/test_memo.py
index 9917c12e4b85cb973e26393ce72d7db1cb308a37..2517a49faf5f3fa71456af45aebf956b64353552 100644
--- a/tests/beembase/test_memo.py
+++ b/tests/beembase/test_memo.py
@@ -1,4 +1,8 @@
 # This Python file uses the following encoding: utf-8
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+from __future__ import unicode_literals
 from builtins import bytes
 from builtins import chr
 from builtins import range
diff --git a/tests/beembase/test_transactions.py b/tests/beembase/test_transactions.py
index 5e7c6c228855ea32f5fe22ba11954c34ce4535d1..94bedb08fdcd67d80952ecfdbc1965c81de590cf 100644
--- a/tests/beembase/test_transactions.py
+++ b/tests/beembase/test_transactions.py
@@ -1,4 +1,7 @@
+from __future__ import absolute_import
+from __future__ import division
 from __future__ import print_function
+from __future__ import unicode_literals
 from builtins import bytes
 from builtins import chr
 from builtins import range