diff --git a/tests/test_pip_show.py b/tests/test_pip_show.py
index 318b3cbc..9e6af845 100644
--- a/tests/test_pip_show.py
+++ b/tests/test_pip_show.py
@@ -10,29 +10,29 @@ class MyTests(unittest.TestCase):
 
     def setUp(self):
         # input
-        with open(os.path.join(THIS_DIR, os.pardir, 'tests/fixtures/centos-7.7/pip-show.out'), 'r') as f:
+        with open(os.path.join(THIS_DIR, os.pardir, 'tests/fixtures/centos-7.7/pip-show.out'), 'r', encoding='utf-8') as f:
             self.centos_7_7_pip_show = f.read()
 
-        with open(os.path.join(THIS_DIR, os.pardir, 'tests/fixtures/ubuntu-18.04/pip-show.out'), 'r') as f:
+        with open(os.path.join(THIS_DIR, os.pardir, 'tests/fixtures/ubuntu-18.04/pip-show.out'), 'r', encoding='utf-8') as f:
             self.ubuntu_18_4_pip_show = f.read()
 
-        with open(os.path.join(THIS_DIR, os.pardir, 'tests/fixtures/osx-10.11.6/pip-show.out'), 'r') as f:
+        with open(os.path.join(THIS_DIR, os.pardir, 'tests/fixtures/osx-10.11.6/pip-show.out'), 'r', encoding='utf-8') as f:
             self.osx_10_11_6_pip_show = f.read()
 
-        with open(os.path.join(THIS_DIR, os.pardir, 'tests/fixtures/osx-10.14.6/pip-show.out'), 'r') as f:
+        with open(os.path.join(THIS_DIR, os.pardir, 'tests/fixtures/osx-10.14.6/pip-show.out'), 'r', encoding='utf-8') as f:
             self.osx_10_14_6_pip_show = f.read()
 
         # output
-        with open(os.path.join(THIS_DIR, os.pardir, 'tests/fixtures/centos-7.7/pip-show.json'), 'r') as f:
+        with open(os.path.join(THIS_DIR, os.pardir, 'tests/fixtures/centos-7.7/pip-show.json'), 'r', encoding='utf-8') as f:
             self.centos_7_7_pip_show_json = json.loads(f.read())
 
-        with open(os.path.join(THIS_DIR, os.pardir, 'tests/fixtures/ubuntu-18.04/pip-show.json'), 'r') as f:
+        with open(os.path.join(THIS_DIR, os.pardir, 'tests/fixtures/ubuntu-18.04/pip-show.json'), 'r', encoding='utf-8') as f:
             self.ubuntu_18_4_pip_show_json = json.loads(f.read())
 
-        with open(os.path.join(THIS_DIR, os.pardir, 'tests/fixtures/osx-10.11.6/pip-show.json'), 'r') as f:
+        with open(os.path.join(THIS_DIR, os.pardir, 'tests/fixtures/osx-10.11.6/pip-show.json'), 'r', encoding='utf-8') as f:
             self.osx_10_11_6_pip_show_json = json.loads(f.read())
 
-        with open(os.path.join(THIS_DIR, os.pardir, 'tests/fixtures/osx-10.14.6/pip-show.json'), 'r') as f:
+        with open(os.path.join(THIS_DIR, os.pardir, 'tests/fixtures/osx-10.14.6/pip-show.json'), 'r', encoding='utf-8') as f:
             self.osx_10_14_6_pip_show_json = json.loads(f.read())
 
     def test_pip_show_centos_7_7(self):
diff --git a/tests/test_systemctl.py b/tests/test_systemctl.py
index 97d10a0f..1da9bad8 100644
--- a/tests/test_systemctl.py
+++ b/tests/test_systemctl.py
@@ -10,17 +10,17 @@ class MyTests(unittest.TestCase):
 
     def setUp(self):
         # input
-        with open(os.path.join(THIS_DIR, os.pardir, 'tests/fixtures/centos-7.7/systemctl.out'), 'r') as f:
+        with open(os.path.join(THIS_DIR, os.pardir, 'tests/fixtures/centos-7.7/systemctl.out'), 'r', encoding='utf-8') as f:
             self.centos_7_7_systemctl = f.read()
 
-        with open(os.path.join(THIS_DIR, os.pardir, 'tests/fixtures/ubuntu-18.04/systemctl.out'), 'r') as f:
+        with open(os.path.join(THIS_DIR, os.pardir, 'tests/fixtures/ubuntu-18.04/systemctl.out'), 'r', encoding='utf-8') as f:
             self.ubuntu_18_4_systemctl = f.read()
 
         # output
-        with open(os.path.join(THIS_DIR, os.pardir, 'tests/fixtures/centos-7.7/systemctl.json'), 'r') as f:
+        with open(os.path.join(THIS_DIR, os.pardir, 'tests/fixtures/centos-7.7/systemctl.json'), 'r', encoding='utf-8') as f:
             self.centos_7_7_systemctl_json = json.loads(f.read())
 
-        with open(os.path.join(THIS_DIR, os.pardir, 'tests/fixtures/ubuntu-18.04/systemctl.json'), 'r') as f:
+        with open(os.path.join(THIS_DIR, os.pardir, 'tests/fixtures/ubuntu-18.04/systemctl.json'), 'r', encoding='utf-8') as f:
             self.ubuntu_18_4_systemctl_json = json.loads(f.read())
 
     def test_systemctl_centos_7_7(self):