diff --git a/.github/actions/devcontainer_run_command/action.yml b/.github/actions/devcontainer_run_command/action.yml
index 0611dad..aec1ae3 100644
--- a/.github/actions/devcontainer_run_command/action.yml
+++ b/.github/actions/devcontainer_run_command/action.yml
@@ -22,6 +22,12 @@ inputs:
   AAD_TENANT_ID:
     description: "The Tenant Id where the App is registered and the Test User is registered for the E2E Tests."
     required: false
+  TEST_ACCOUNT_CLIENT_ID:
+    description: "The Test Automation Account Client Id used to interact with the API."
+    required: false
+  TEST_ACCOUNT_CLIENT_SECRET:
+    description: "The Test Automation Account Client Secret used to interact with the API."
+    required: false
   TRE_ID:
     description: "The TRE Id."
     required: false
@@ -259,6 +265,8 @@ runs:
           -e TRE_ID="${{ inputs.TRE_ID }}" \
           -e TF_VAR_tre_id="${{ inputs.TRE_ID }}" \
           -e TRE_URL="${{ env.TRE_URL }}" \
+          -e TEST_ACCOUNT_CLIENT_ID="${{ inputs.TEST_ACCOUNT_CLIENT_ID }}" \
+          -e TEST_ACCOUNT_CLIENT_SECRET="${{ inputs.TEST_ACCOUNT_CLIENT_SECRET }}" \
           -e IS_API_SECURED=${{ inputs.IS_API_SECURED }} \
           -e DOCKER_BUILDKIT=1 \
           -e TF_VAR_stateful_resources_locked=${{ inputs.STATEFUL_RESOURCES_LOCKED }} \
diff --git a/.github/workflows/deploy_tre.yml b/.github/workflows/deploy_tre.yml
index 2d5eb7b..71fdf4f 100644
--- a/.github/workflows/deploy_tre.yml
+++ b/.github/workflows/deploy_tre.yml
@@ -49,6 +49,8 @@ jobs:
       MGMT_RESOURCE_GROUP_NAME: ${{ secrets.MGMT_RESOURCE_GROUP_NAME }}
       MGMT_STORAGE_ACCOUNT_NAME: ${{ secrets.MGMT_STORAGE_ACCOUNT_NAME }}
       SWAGGER_UI_CLIENT_ID: ${{ secrets.SWAGGER_UI_CLIENT_ID }}
+      TEST_ACCOUNT_CLIENT_ID: "${{ secrets.TEST_ACCOUNT_CLIENT_ID }}"
+      TEST_ACCOUNT_CLIENT_SECRET: "${{ secrets.TEST_ACCOUNT_CLIENT_SECRET }}"
       TRE_ID: ${{ secrets.TRE_ID }}
       CI_CACHE_ACR_NAME: ${{ secrets.ACR_NAME }}
       ENCRYPTION_KV_NAME: ${{ secrets.ENCRYPTION_KV_NAME }}
diff --git a/.github/workflows/deploy_tre_branch.yml b/.github/workflows/deploy_tre_branch.yml
index 580cf34..7a7c905 100644
--- a/.github/workflows/deploy_tre_branch.yml
+++ b/.github/workflows/deploy_tre_branch.yml
@@ -80,6 +80,8 @@ jobs:
       MGMT_RESOURCE_GROUP_NAME: ${{ format('rg-tre{0}-mgmt', needs.prepare-not-main.outputs.refid) }}
       MGMT_STORAGE_ACCOUNT_NAME: ${{ format('tre{0}mgmt', needs.prepare-not-main.outputs.refid) }}
       SWAGGER_UI_CLIENT_ID: ${{ secrets.SWAGGER_UI_CLIENT_ID }}
+      TEST_ACCOUNT_CLIENT_ID: "${{ secrets.TEST_ACCOUNT_CLIENT_ID }}"
+      TEST_ACCOUNT_CLIENT_SECRET: "${{ secrets.TEST_ACCOUNT_CLIENT_SECRET }}"
       TRE_ID: ${{ format('tre{0}', needs.prepare-not-main.outputs.refid) }}
       CI_CACHE_ACR_NAME: ${{ secrets.ACR_NAME }}
       ENCRYPTION_KV_NAME: ${{ format('tre{0}mgmt', needs.prepare-not-main.outputs.refid) }}
diff --git a/.github/workflows/deploy_tre_reusable.yml b/.github/workflows/deploy_tre_reusable.yml
index 2ad056b..4ded2e2 100644
--- a/.github/workflows/deploy_tre_reusable.yml
+++ b/.github/workflows/deploy_tre_reusable.yml
@@ -74,6 +74,12 @@ on: # yamllint disable-line rule:truthy
       SWAGGER_UI_CLIENT_ID:
         description: ""
         required: true
+      TEST_ACCOUNT_CLIENT_ID:
+        description: Client ID for test automation account used for unattended bundle registration
+        required: true
+      TEST_ACCOUNT_CLIENT_SECRET:
+        description: Client secret for test automation account used for unattended bundle registration
+        required: true
       TRE_ID:
         description: ""
         required: true
@@ -146,6 +152,12 @@ jobs:
           if [ "${{ secrets.SWAGGER_UI_CLIENT_ID }}" == '' ]; then
             echo "Missing secret: SWAGGER_UI_CLIENT_ID" && exit 1
           fi
+          if [ "${{ secrets.TEST_ACCOUNT_CLIENT_ID }}" == '' ]; then
+            echo "Missing secret: TEST_ACCOUNT_CLIENT_ID" && exit 1
+          fi
+          if [ "${{ secrets.TEST_ACCOUNT_CLIENT_SECRET }}" == '' ]; then
+            echo "Missing secret: TEST_ACCOUNT_CLIENT_SECRET" && exit 1
+          fi
           if [ "${{ secrets.TRE_ID }}" == '' ]; then
             echo "Missing secret: TRE_ID" && exit 1
           fi
@@ -533,6 +545,8 @@ jobs:
           ACR_NAME: ${{ secrets.ACR_NAME }}
           API_CLIENT_ID: "${{ secrets.API_CLIENT_ID }}"
           AAD_TENANT_ID: "${{ secrets.AAD_TENANT_ID }}"
+          TEST_ACCOUNT_CLIENT_ID: "${{ secrets.TEST_ACCOUNT_CLIENT_ID }}"
+          TEST_ACCOUNT_CLIENT_SECRET: "${{ secrets.TEST_ACCOUNT_CLIENT_SECRET }}"
           TRE_ID: ${{ secrets.TRE_ID }}
           LOCATION: ${{ vars.LOCATION }}
           BUNDLE_TYPE: ${{ matrix.BUNDLE_TYPE }}
@@ -595,6 +609,8 @@ jobs:
           ACR_NAME: ${{ secrets.ACR_NAME }}
           API_CLIENT_ID: "${{ secrets.API_CLIENT_ID }}"
           AAD_TENANT_ID: "${{ secrets.AAD_TENANT_ID }}"
+          TEST_ACCOUNT_CLIENT_ID: "${{ secrets.TEST_ACCOUNT_CLIENT_ID }}"
+          TEST_ACCOUNT_CLIENT_SECRET: "${{ secrets.TEST_ACCOUNT_CLIENT_SECRET }}"
           TRE_ID: ${{ secrets.TRE_ID }}
           LOCATION: ${{ vars.LOCATION }}
           BUNDLE_TYPE: ${{ matrix.BUNDLE_TYPE }}
@@ -647,6 +663,8 @@ jobs:
           ACR_NAME: ${{ secrets.ACR_NAME }}
           API_CLIENT_ID: "${{ secrets.API_CLIENT_ID }}"
           AAD_TENANT_ID: "${{ secrets.AAD_TENANT_ID }}"
+          TEST_ACCOUNT_CLIENT_ID: "${{ secrets.TEST_ACCOUNT_CLIENT_ID }}"
+          TEST_ACCOUNT_CLIENT_SECRET: "${{ secrets.TEST_ACCOUNT_CLIENT_SECRET }}"
           TRE_ID: ${{ secrets.TRE_ID }}
           LOCATION: ${{ vars.LOCATION }}
           BUNDLE_TYPE: ${{ matrix.BUNDLE_TYPE }}
@@ -676,6 +694,8 @@ jobs:
           AZURE_ENVIRONMENT: ${{ vars.AZURE_ENVIRONMENT }}
           API_CLIENT_ID: "${{ secrets.API_CLIENT_ID }}"
           AAD_TENANT_ID: "${{ secrets.AAD_TENANT_ID }}"
+          TEST_ACCOUNT_CLIENT_ID: "${{ secrets.TEST_ACCOUNT_CLIENT_ID }}"
+          TEST_ACCOUNT_CLIENT_SECRET: "${{ secrets.TEST_ACCOUNT_CLIENT_SECRET }}"
           TRE_ID: ${{ secrets.TRE_ID }}
           LOCATION: ${{ vars.LOCATION }}
 
@@ -689,6 +709,8 @@ jobs:
           AZURE_ENVIRONMENT: ${{ vars.AZURE_ENVIRONMENT }}
           API_CLIENT_ID: "${{ secrets.API_CLIENT_ID }}"
           AAD_TENANT_ID: "${{ secrets.AAD_TENANT_ID }}"
+          TEST_ACCOUNT_CLIENT_ID: "${{ secrets.TEST_ACCOUNT_CLIENT_ID }}"
+          TEST_ACCOUNT_CLIENT_SECRET: "${{ secrets.TEST_ACCOUNT_CLIENT_SECRET }}"
           TRE_ID: ${{ secrets.TRE_ID }}
           LOCATION: ${{ vars.LOCATION }}
           TERRAFORM_STATE_CONTAINER_NAME: ${{ vars.TERRAFORM_STATE_CONTAINER_NAME }}
diff --git a/.github/workflows/register_tre_bundle.yml b/.github/workflows/register_tre_bundle.yml
index 8110a01..2c6a508 100644
--- a/.github/workflows/register_tre_bundle.yml
+++ b/.github/workflows/register_tre_bundle.yml
@@ -235,5 +235,7 @@ jobs:
           ACR_NAME: ${{ secrets.ACR_NAME }}
           API_CLIENT_ID: "${{ secrets.API_CLIENT_ID }}"
           AAD_TENANT_ID: "${{ secrets.AAD_TENANT_ID }}"
+          TEST_ACCOUNT_CLIENT_ID: "${{ secrets.TEST_ACCOUNT_CLIENT_ID }}"
+          TEST_ACCOUNT_CLIENT_SECRET: "${{ secrets.TEST_ACCOUNT_CLIENT_SECRET }}"
           TRE_ID: ${{ secrets.TRE_ID }}
           LOCATION: ${{ vars.LOCATION }}