diff --git a/src/backend/phpunit.xml b/src/backend/phpunit.xml
index 42d87a42..775c732c 100644
--- a/src/backend/phpunit.xml
+++ b/src/backend/phpunit.xml
@@ -22,6 +22,7 @@
         </whitelist>
     </filter>
     <php>
+        <env name="sample" value="en"/>
         <env name="APP_ENV" value="testing"/>
         <env name="DB_CONNECTION" value="testing"/>
         <env name="TEST_DB_CONNECTION" value="testing_test_company_db"/>