diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 164599f911..cebdc02163 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -8,7 +8,15 @@ env:
   IMAGE: appwrite-dev
   CACHE_KEY: appwrite-dev-${{ github.event.pull_request.head.sha }}
 
-on: [ pull_request ]
+on:
+  pull_request:
+  workflow_dispatch:
+    inputs:
+      response_format:
+        description: 'Response format version to test (e.g., 1.5.0, 1.4.0)'
+        required: false
+        type: string
+        default: ''
 
 jobs:
   check_database_changes:
@@ -100,7 +108,10 @@ jobs:
         run: docker compose exec -T appwrite vars
 
       - name: Run Unit Tests
-        run: docker compose exec appwrite test /usr/src/code/tests/unit
+        run: |
+          docker compose exec \
+            -e _APP_E2E_RESPONSE_FORMAT="${{ github.event.inputs.response_format }}" \
+            appwrite test /usr/src/code/tests/unit
 
   e2e_general_test:
     name: E2E General Test
@@ -132,7 +143,10 @@ jobs:
           done
 
       - name: Run General Tests
-        run: docker compose exec -T appwrite test /usr/src/code/tests/e2e/General --debug
+        run: |
+          docker compose exec -T \
+            -e _APP_E2E_RESPONSE_FORMAT="${{ github.event.inputs.response_format }}" \
+            appwrite test /usr/src/code/tests/e2e/General --debug
 
       - name: Failure Logs
         if: failure()
@@ -208,6 +222,7 @@ jobs:
           docker compose exec -T \
             -e _APP_DATABASE_SHARED_TABLES \
             -e _APP_DATABASE_SHARED_TABLES_V1 \
+            -e _APP_E2E_RESPONSE_FORMAT="${{ github.event.inputs.response_format }}" \
             appwrite test /usr/src/code/tests/e2e/Services/${{ matrix.service }} --debug --exclude-group devKeys,screenshots
 
       - name: Failure Logs
@@ -296,6 +311,7 @@ jobs:
           docker compose exec -T \
             -e _APP_DATABASE_SHARED_TABLES \
             -e _APP_DATABASE_SHARED_TABLES_V1 \
+            -e _APP_E2E_RESPONSE_FORMAT="${{ github.event.inputs.response_format }}" \
             appwrite test /usr/src/code/tests/e2e/Services/${{ matrix.service }} --debug --exclude-group devKeys,screenshots
 
       - name: Failure Logs
@@ -337,6 +353,7 @@ jobs:
           docker compose exec -T \
             -e _APP_DATABASE_SHARED_TABLES \
             -e _APP_DATABASE_SHARED_TABLES_V1 \
+            -e _APP_E2E_RESPONSE_FORMAT="${{ github.event.inputs.response_format }}" \
             appwrite test /usr/src/code/tests/e2e/Services/Projects --debug --group=devKeys
 
       - name: Failure Logs
@@ -392,6 +409,7 @@ jobs:
           docker compose exec -T \
             -e _APP_DATABASE_SHARED_TABLES \
             -e _APP_DATABASE_SHARED_TABLES_V1 \
+            -e _APP_E2E_RESPONSE_FORMAT="${{ github.event.inputs.response_format }}" \
             appwrite test /usr/src/code/tests/e2e/Services/Projects --debug --group=devKeys
 
       - name: Failure Logs
@@ -434,6 +452,7 @@ jobs:
           docker compose exec -T \
             -e _APP_DATABASE_SHARED_TABLES \
             -e _APP_DATABASE_SHARED_TABLES_V1 \
+            -e _APP_E2E_RESPONSE_FORMAT="${{ github.event.inputs.response_format }}" \
             appwrite test /usr/src/code/tests/e2e/Services/Sites --debug --group=screenshots
 
       - name: Failure Logs
@@ -490,6 +509,7 @@ jobs:
           docker compose exec -T \
             -e _APP_DATABASE_SHARED_TABLES \
             -e _APP_DATABASE_SHARED_TABLES_V1 \
+            -e _APP_E2E_RESPONSE_FORMAT="${{ github.event.inputs.response_format }}" \
             appwrite test /usr/src/code/tests/e2e/Services/Sites --debug --group=screenshots
 
       - name: Failure Logs
@@ -498,4 +518,4 @@ jobs:
           echo "=== Appwrite Worker Builds Logs ==="
           docker compose logs appwrite-worker-builds
           echo "=== OpenRuntimes Executor Logs ==="
-          docker compose logs openruntimes-executor
+          docker compose logs openruntimes-executor
\ No newline at end of file
diff --git a/tests/e2e/Client.php b/tests/e2e/Client.php
index e411b68454..6b81713654 100644
--- a/tests/e2e/Client.php
+++ b/tests/e2e/Client.php
@@ -108,6 +108,20 @@ class Client
         return $this;
     }
 
+    /**
+     * Set Response Format
+     *
+     * @param string $value
+     *
+     * @return self $this
+     */
+    public function setResponseFormat(string $value): self
+    {
+        $this->addHeader('X-Appwrite-Response-Format', $value);
+
+        return $this;
+    }
+
     /**
      * @param bool $status true
      * @return self $this
diff --git a/tests/e2e/Scopes/Scope.php b/tests/e2e/Scopes/Scope.php
index 2dbeae961e..5b7f1a8771 100644
--- a/tests/e2e/Scopes/Scope.php
+++ b/tests/e2e/Scopes/Scope.php
@@ -7,6 +7,7 @@ use Appwrite\Tests\Retryable;
 use PHPUnit\Framework\TestCase;
 use Tests\E2E\Client;
 use Utopia\Database\Helpers\ID;
+use Utopia\System\System;
 
 abstract class Scope extends TestCase
 {
@@ -23,6 +24,17 @@ abstract class Scope extends TestCase
     {
         $this->client = new Client();
         $this->client->setEndpoint($this->endpoint);
+
+        $format = System::getEnv('_APP_E2E_RESPONSE_FORMAT');
+        if (!empty($format)) {
+            if (
+                !\preg_match('/^\d+\.\d+\.\d+$/', $format) ||
+                !\version_compare($format, APP_VERSION_STABLE, '<=')
+            ) {
+                throw new \Exception('E2E response format must be ' . APP_VERSION_STABLE . ' or lower.');
+            }
+            $this->client->setResponseFormat($format);
+        }
     }
 
     protected function tearDown(): void