diff --git a/.env.test b/.env.test
index ca89a74..d15ee6f 100644
--- a/.env.test
+++ b/.env.test
@@ -19,6 +19,10 @@ S3_ACCESS_KEY=JANE_DOE
 S3_SECRET_KEY=JANE_DOE
 S3_REGION=us-east-1
 
+# Prefix used by pyro-api to build per-org S3 bucket names. Must be a valid
+# bucket-name prefix (lowercase letters, digits, hyphens). Empty => InvalidBucketName.
+SERVER_NAME=envdev-server
+
 DB_UI_MAIL=dummy@pyronear.com
 DB_UI_PWD=strong-password