diff --git a/commons/feature_toggles/feature_toggle_manager.py b/commons/feature_toggles/feature_toggle_manager.py
index 9d240b49..0783b4a6 100644
--- a/commons/feature_toggles/feature_toggle_manager.py
+++ b/commons/feature_toggles/feature_toggle_manager.py
@@ -2,19 +2,11 @@
 import json
 from time_tracker_api.security import current_user_email
 from azure.appconfiguration import AzureAppConfigurationClient
+from utils.environment_variables import check_variables_are_defined
 
 
 class FeatureToggleConfig:
-    def check_variables_are_defined():
-        azure_app_variable = 'AZURE_APP_CONFIGURATION_CONNECTION_STRING'
-        if azure_app_variable not in os.environ:
-            raise EnvironmentError(
-                "{} is not defined in the environment".format(
-                    azure_app_variable
-                )
-            )
-
-    check_variables_are_defined()
+    check_variables_are_defined(['AZURE_APP_CONFIGURATION_CONNECTION_STRING'])
     AZURE_APP_CONFIGURATION_CONNECTION_STRING = os.environ.get(
         'AZURE_APP_CONFIGURATION_CONNECTION_STRING'
     )
diff --git a/requirements/time_tracker_api/dev.txt b/requirements/time_tracker_api/dev.txt
index 3a26760c..c85a2bbc 100644
--- a/requirements/time_tracker_api/dev.txt
+++ b/requirements/time_tracker_api/dev.txt
@@ -15,4 +15,4 @@ pytest-mock==2.0.0
 coverage==4.5.1
 
 # Git hooks
-pre-commit==2.2.0
\ No newline at end of file
+pre-commit==2.2.0
diff --git a/utils/azure_users.py b/utils/azure_users.py
index 279584b1..1ae7f0c3 100644
--- a/utils/azure_users.py
+++ b/utils/azure_users.py
@@ -3,24 +3,20 @@
 import requests
 import json
 from typing import List
+from utils.environment_variables import check_variables_are_defined
 
 
 class MSConfig:
-    def check_variables_are_defined():
-        auth_variables = [
-            'MS_CLIENT_ID',
-            'MS_AUTHORITY',
-            'MS_SECRET',
-            'MS_SCOPE',
-            'MS_ENDPOINT',
-        ]
-        for var in auth_variables:
-            if var not in os.environ:
-                raise EnvironmentError(
-                    "{} is not defined in the environment".format(var)
-                )
+    ms_variables = [
+        'MS_CLIENT_ID',
+        'MS_AUTHORITY',
+        'MS_SECRET',
+        'MS_SCOPE',
+        'MS_ENDPOINT',
+    ]
+
+    check_variables_are_defined(ms_variables)
 
-    check_variables_are_defined()
     CLIENT_ID = os.environ.get('MS_CLIENT_ID')
     AUTHORITY = os.environ.get('MS_AUTHORITY')
     SECRET = os.environ.get('MS_SECRET')
diff --git a/utils/environment_variables.py b/utils/environment_variables.py
new file mode 100644
index 00000000..52bb7a96
--- /dev/null
+++ b/utils/environment_variables.py
@@ -0,0 +1,9 @@
+import os
+
+
+def check_variables_are_defined(variables):
+    for var in variables:
+        if var not in os.environ:
+            raise EnvironmentError(
+                "{} is not defined in the environment".format(var)
+            )