diff --git a/azure/azure-release-pipeline.yml b/azure/azure-release-pipeline.yml
index 59fb4348a..9980e892b 100644
--- a/azure/azure-release-pipeline.yml
+++ b/azure/azure-release-pipeline.yml
@@ -99,6 +99,21 @@ extends:
           smoke_tests: true
       depends_on:
       - ers_manual_approval_int
+    - environment: manual-approval
+      stage_name: ers_manual_approval_testdev
+    - environment: internal-dev
+      stage_name: ers_testdev_release
+      service_name: "${{ variables.service_name }}-testdev"
+      short_service_name: "${{ variables.short_service_name }}-testdev"
+      service_base_path: "${{ variables.service_base_path }}-testdev"
+      jinja_templates:
+        ERS_TARGET_SERVER: e-referrals-service-api--testdev
+      post_deploy:
+      - template: templates/run-tests.yml
+        parameters:
+          smoke_tests: true
+      depends_on:
+      - ers_manual_approval_testdev
     - environment: manual-approval
       stage_name: ers_manual_approval_dep
     - environment: dev
diff --git a/manifest_template.yml b/manifest_template.yml
index 24b473d8a..0e29f4b9f 100644
--- a/manifest_template.yml
+++ b/manifest_template.yml
@@ -35,6 +35,9 @@ APIGEE_ENVIRONMENTS:
   - name: ftxxii-internal-dev
     display_name: Internal Development - ft22
     euo_allowlist_required: false
+  - name: testdev-internal-dev
+    display_name: Internal Development - testdev
+    euo_allowlist_required: false
 
 - name: internal-dev-sandbox
   variants: