diff --git a/enterprise/server/auth/constants.py b/enterprise/server/auth/constants.py
index 867e97c13d..df6e9aef54 100644
--- a/enterprise/server/auth/constants.py
+++ b/enterprise/server/auth/constants.py
@@ -39,6 +39,8 @@ ROLE_CHECK_ENABLED = os.getenv('ROLE_CHECK_ENABLED', 'false').lower() in (
     'on',
 )
 
+DUPLICATE_EMAIL_CHECK = os.getenv('DUPLICATE_EMAIL_CHECK', 'true') in ('1', 'true')
+
 # reCAPTCHA Enterprise
 RECAPTCHA_PROJECT_ID = os.getenv('RECAPTCHA_PROJECT_ID', '').strip()
 RECAPTCHA_SITE_KEY = os.getenv('RECAPTCHA_SITE_KEY', '').strip()
diff --git a/enterprise/server/auth/token_manager.py b/enterprise/server/auth/token_manager.py
index 1c641a094c..4e5b4316df 100644
--- a/enterprise/server/auth/token_manager.py
+++ b/enterprise/server/auth/token_manager.py
@@ -19,6 +19,7 @@ from keycloak.exceptions import (
 from server.auth.constants import (
     BITBUCKET_APP_CLIENT_ID,
     BITBUCKET_APP_CLIENT_SECRET,
+    DUPLICATE_EMAIL_CHECK,
     GITHUB_APP_CLIENT_ID,
     GITHUB_APP_CLIENT_SECRET,
     GITLAB_APP_CLIENT_ID,
@@ -646,6 +647,10 @@ class TokenManager:
         if not email:
             return False
 
+        # We have the option to skip the duplicate email check in test environments
+        if not DUPLICATE_EMAIL_CHECK:
+            return False
+
         base_email = extract_base_email(email)
         if not base_email:
             logger.warning(f'Could not extract base email from: {email}')