diff --git a/deployments/dev/environment.py b/deployments/dev/environment.py
index 5cc9587575..58c4ecc3f9 100644
--- a/deployments/dev/environment.py
+++ b/deployments/dev/environment.py
@@ -192,6 +192,7 @@ def env() -> Mapping[str, Optional[str]]:
 
         'AZUL_DEPLOYMENT_STAGE': 'dev',
 
+        'AZUL_DOMAIN_NAME': '{AZUL_DEPLOYMENT_STAGE}.singlecell.gi.ucsc.edu',
         'AZUL_URL_REDIRECT_BASE_DOMAIN_NAME': 'dev.url.singlecell.gi.ucsc.edu',
         'AZUL_URL_REDIRECT_FULL_DOMAIN_NAME': '{AZUL_DEPLOYMENT_STAGE}.{AZUL_URL_REDIRECT_BASE_DOMAIN_NAME}',
         'AZUL_DRS_DOMAIN_NAME': 'drs.dev.singlecell.gi.ucsc.edu',
diff --git a/environment.py b/environment.py
index 625b199913..b0ccfa9952 100644
--- a/environment.py
+++ b/environment.py
@@ -202,7 +202,7 @@ def env() -> Mapping[str, Optional[str]]:
         # created manually prior to running `make deploy`. The value is typically
         # not deployment specific. A subdomain will automatically be created for
         # each deployment.
-        'AZUL_DOMAIN_NAME': '{AZUL_DEPLOYMENT_STAGE}.singlecell.gi.ucsc.edu',
+        'AZUL_DOMAIN_NAME': None,
 
         # An optional list of roles in other AWS accounts that can assume the IAM
         # role normally assumed by lambda functions in the active Azul deployment.