diff --git a/civicrm_tester/base.py b/civicrm_tester/base.py
index 57b26a3..2d44183 100644
--- a/civicrm_tester/base.py
+++ b/civicrm_tester/base.py
@@ -35,7 +35,7 @@ class BaseTester:
         self.user = user
         self.passwd = passwd
         if dev:
-            self.base_url = "https://crm.staging.caat.org.uk"
+            self.base_url = "https://crm.dev.caat.org.uk"
         else:
             self.base_url = "https://crm.staging.caat.org.uk"