diff --git a/.github/workflows/acceptance-tests.yml b/.github/workflows/acceptance-tests.yml
index edfda740..b1ecc606 100644
--- a/.github/workflows/acceptance-tests.yml
+++ b/.github/workflows/acceptance-tests.yml
@@ -36,5 +36,6 @@ jobs:
         HEROKU_TEST_USER: mars+heroku-terraform-ci-admin@heroku.com
         HEROKU_NON_ADMIN_TEST_USER: mars+heroku-terraform-ci-member@heroku.com
         HEROKU_SLUG_ID: 8527dbf3-c0a0-4255-beab-aca0aad1dfc9
+        HEROKU_USER_ID: 04eb779f-b046-4bc3-9b7e-d2c8512c3927
         GOFLAGS: "-mod=vendor"
         # TF_LOG: DEBUG
diff --git a/TESTING.md b/TESTING.md
index 8ae676fd..4546b356 100644
--- a/TESTING.md
+++ b/TESTING.md
@@ -40,6 +40,7 @@ The following parameters are available for running the test. The absence of some
 * **HEROKU_NON_ADMIN_TEST_USER**(`string`) The name of an existing non-admin user belonging to the organization, that will be used for various test cases.
 * **HEROKU_SLUG_ID**(`string`) The ID of an existing slug built in the Common Runtime (otherwise "Slug not compatible with space" errors will be thrown)
 * **HEROKU_SPACES_ORGANIZATION**(`string`) The Heroku Enterprise Team for which Heroku Private Space tests will be run under.
+* **HEROKU_USER_ID**(`string`) The UUID of an existing Heroku user.
 * **TF_LOG**(`DEBUG|TRACE`) Enables more detailed logging of tests, including http request/responses. 
 
 For example: