diff --git a/deploy/testsys-launcher/README.md b/deploy/testsys-launcher/README.md
index a023c06d..d5d6b18d 100644
--- a/deploy/testsys-launcher/README.md
+++ b/deploy/testsys-launcher/README.md
@@ -13,8 +13,9 @@ cdk deploy
 ```
 
 The default role that can assume the `testsys-admin` role is "Administrator".
-During deployment, use `--parameter TestsysAssumerRole={MY-ROLE-NAME}` to specify
-a different role that can assume the `testsys-admin` role.
+To specify other roles to assume `testsys-admin`, modify `cdk.json` or use
+a comma separated set of roles via CDK context like
+`--context testsysAdminAssumedBy=<role1>,<role2>,<role3>`.
 
 To get the kubeconfig, assuming you are acting as the role that can assume `testsys-admin`,
 use the `aws eks update-kubeconfig` command with the `testsys-admin` role: