diff --git a/ably/realtime_conn_spec_integration_test.go b/ably/realtime_conn_spec_integration_test.go
index 18b47381..420e1e65 100644
--- a/ably/realtime_conn_spec_integration_test.go
+++ b/ably/realtime_conn_spec_integration_test.go
@@ -222,7 +222,7 @@ func Test_RTN4a_ConnectionEventForStateChange(t *testing.T) {
 	t.Run(fmt.Sprintf("on %s", ably.ConnectionStateFailed), func(t *testing.T) {
 
 		options := []ably.ClientOption{
-			ably.WithEnvironment("sandbox"),
+			ably.WithEnvironment("lmars-dev"),
 			ably.WithAutoConnect(false),
 			ably.WithKey("made:up"),
 		}
diff --git a/ably/rest_client_integration_test.go b/ably/rest_client_integration_test.go
index bf4c823b..0f034bb8 100644
--- a/ably/rest_client_integration_test.go
+++ b/ably/rest_client_integration_test.go
@@ -814,7 +814,7 @@ func postStats(app *ablytest.Sandbox, stats []*ably.Stats) error {
 		return fmt.Errorf("marshaling stats: %w", err)
 	}
 
-	req, err := http.NewRequest("POST", "https://sandbox-rest.ably.io/stats", bytes.NewReader(statsJSON))
+	req, err := http.NewRequest("POST", "https://lmars-dev-rest.ably.io/stats", bytes.NewReader(statsJSON))
 	if err != nil {
 		return fmt.Errorf("creating request: %w", err)
 	}
diff --git a/ablytest/ablytest.go b/ablytest/ablytest.go
index fc7b8363..e9782972 100644
--- a/ablytest/ablytest.go
+++ b/ablytest/ablytest.go
@@ -17,7 +17,7 @@ import (
 var Timeout = 30 * time.Second
 var NoBinaryProtocol bool
 var DefaultLogLevel = ably.LogNone
-var Environment = "sandbox"
+var Environment = "lmars-dev"
 
 func nonil(err ...error) error {
 	for _, err := range err {