diff --git a/.github/actions/maestro-android/action.yml b/.github/actions/maestro-android/action.yml
index c8882c023b279f..99a8c0733098af 100644
--- a/.github/actions/maestro-android/action.yml
+++ b/.github/actions/maestro-android/action.yml
@@ -25,6 +25,10 @@ inputs:
     required: false
     default: "."
     description: The directory from which metro should be started
+  architecture:
+    required: false
+    default: "NewArch"
+    description: The react native architecture to test
 
 runs:
   using: composite
@@ -52,6 +56,7 @@ runs:
       if: ${{ inputs.flavor == 'debug' }}
       run: ./packages/react-native-codegen/scripts/oss/build.sh
     - name: Run e2e tests
+      id: run-tests
       uses: reactivecircus/android-emulator-runner@v2
       with:
         api-level: 24
@@ -69,16 +74,16 @@ runs:
         NORM_APP_ID=$(echo "${{ inputs.app-id }}" | tr '.' '-')
         echo "app-id=$NORM_APP_ID" >> $GITHUB_OUTPUT
     - name: Store tests result
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4.3.4
       if: always()
       with:
-        name: e2e_android_${{ steps.normalize-app-id.outputs.app-id }}_report_${{ inputs.jsengine }}_${{ inputs.flavor }}
+        name: e2e_android_${{ steps.normalize-app-id.outputs.app-id }}_report_${{ inputs.jsengine }}_${{ inputs.flavor }}_${{ inputs.architecture }}
         path: |
           report.xml
           screen.mp4
     - name: Store Logs
-      if: failure() && steps.run-tests.outcome == 'failure'
+      if: steps.run-tests.outcome == 'failure'
       uses: actions/upload-artifact@v4.3.4
       with:
-        name: maestro-logs-android-${{ steps.normalize-app-id.outputs.app-id }}-${{ inputs.jsengine }}-${{ inputs.flavor }}
+        name: maestro-logs-android-${{ steps.normalize-app-id.outputs.app-id }}-${{ inputs.jsengine }}-${{ inputs.flavor }}-${{ inputs.architecture }}
         path: /tmp/MaestroLogs
diff --git a/.github/actions/maestro-ios/action.yml b/.github/actions/maestro-ios/action.yml
index 34586168369690..e5dd927bec32ed 100644
--- a/.github/actions/maestro-ios/action.yml
+++ b/.github/actions/maestro-ios/action.yml
@@ -21,6 +21,10 @@ inputs:
     required: false
     default: "."
     description: The directory from which metro should be started
+  architecture:
+    required: false
+    default: "NewArch"
+    description: The react native architecture to test
 
 runs:
   using: composite
@@ -86,8 +90,6 @@ runs:
           CURR_ATTEMPT=$((CURR_ATTEMPT+1))
           echo "Attempt number $CURR_ATTEMPT"
 
-
-
           echo "Start video record using pid: video_record_${{ inputs.jsengine }}_$CURR_ATTEMPT.pid"
           xcrun simctl io booted recordVideo video_record_$CURR_ATTEMPT.mov & echo $! > video_record_${{ inputs.jsengine }}_$CURR_ATTEMPT.pid
 
@@ -105,7 +107,7 @@ runs:
       if: always()
       uses: actions/upload-artifact@v4.3.4
       with:
-        name: e2e_ios_${{ inputs.app-id }}_report_${{ inputs.jsengine }}_${{ inputs.flavor }}
+        name: e2e_ios_${{ inputs.app-id }}_report_${{ inputs.jsengine }}_${{ inputs.flavor }}_${{ inputs.architecture }}
         path: |
           video_record_1.mov
           video_record_2.mov
@@ -117,5 +119,5 @@ runs:
       if: failure() && steps.run-tests.outcome == 'failure'
       uses: actions/upload-artifact@v4.3.4
       with:
-        name: maestro-logs-${{ inputs.app-id }}-${{ inputs.jsengine }}-${{ inputs.flavor }}
+        name: maestro-logs-${{ inputs.app-id }}-${{ inputs.jsengine }}-${{ inputs.flavor }}-${{ inputs.architecture }}
         path: /tmp/MaestroLogs
diff --git a/.github/workflow-scripts/maestro-android.js b/.github/workflow-scripts/maestro-android.js
index 462ce25ae42007..f6533bd0933cdc 100644
--- a/.github/workflow-scripts/maestro-android.js
+++ b/.github/workflow-scripts/maestro-android.js
@@ -55,6 +55,7 @@ async function main() {
       stdio: 'ignore',
       detached: true,
     });
+    metroProcess.unref();
     console.info(`- Metro PID: ${metroProcess.pid}`);
   }
 
@@ -88,15 +89,15 @@ async function main() {
     if (IS_DEBUG && metroProcess != null) {
       const pid = metroProcess.pid;
       console.info(`Kill Metro. PID: ${pid}`);
-      process.kill(-pid);
+      process.kill(pid);
       console.info(`Metro Killed`);
-      process.exit();
     }
   }
 
   if (error) {
     throw error;
   }
+  process.exit();
 }
 
 function sleep(ms) {
diff --git a/.github/workflows/test-all.yml b/.github/workflows/test-all.yml
index 6511d7dab53ccc..b10d34c232315a 100644
--- a/.github/workflows/test-all.yml
+++ b/.github/workflows/test-all.yml
@@ -233,6 +233,7 @@ jobs:
       matrix:
         jsengine: [Hermes, JSC]
         flavor: [Debug, Release]
+        architecture: [OldArch, NewArch]
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -277,7 +278,12 @@ jobs:
 
           cd /tmp/RNTestProject/ios
           bundle install
-          HERMES_ENGINE_TARBALL_PATH=$HERMES_PATH bundle exec pod install
+          NEW_ARCH_ENABLED=1
+          if [[ ${{ matrix.architecture }} == "OldArch" ]]; then
+            echo "Disable the New Architecture"
+            NEW_ARCH_ENABLED=0
+          fi
+          HERMES_ENGINE_TARBALL_PATH=$HERMES_PATH RCT_NEW_ARCH_ENABLED=$NEW_ARCH_ENABLED bundle exec pod install
 
           xcodebuild \
             -scheme "RNTestProject" \
@@ -295,6 +301,7 @@ jobs:
           maestro-flow: ./scripts/e2e/.maestro/
           flavor: ${{ matrix.flavor }}
           working-directory: /tmp/RNTestProject
+          architecture: ${{ matrix.architecture }}
 
   test_e2e_android_templateapp:
     if: ${{ github.ref == 'refs/heads/main' || contains(github.ref,  'stable') || inputs.run-e2e-tests }}
@@ -306,6 +313,7 @@ jobs:
       matrix:
         jsengine: [Hermes, JSC]
         flavor: [debug, release]
+        architecture: [OldArch, NewArch]
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -351,6 +359,11 @@ jobs:
           cd /tmp/RNTestProject
           echo "react.internal.mavenLocalRepo=$MAVEN_LOCAL" >> android/gradle.properties
 
+          if [[ ${{matrix.architecture}} == "OldArch" ]]; then
+            echo "Disabling the New Architecture"
+            sed -i 's/newArchEnabled=true/newArchEnabled=false/' android/gradle.properties
+          fi
+
           # Build
           cd android
           CAPITALIZED_FLAVOR=$(echo "${{ matrix.flavor }}" | awk '{print toupper(substr($0, 1, 1)) substr($0, 2)}')
@@ -366,6 +379,7 @@ jobs:
           install-java: 'false'
           flavor: ${{ matrix.flavor }}
           working-directory: /tmp/RNTestProject
+          architecture: ${{ matrix.architecture }}
 
   build_hermesc_linux:
     runs-on: ubuntu-latest
diff --git a/packages/rn-tester/Podfile.lock b/packages/rn-tester/Podfile.lock
index 53dd474502eced..e750e9682ba25a 100644
--- a/packages/rn-tester/Podfile.lock
+++ b/packages/rn-tester/Podfile.lock
@@ -1870,8 +1870,8 @@ EXTERNAL SOURCES:
     :path: "../react-native/ReactCommon/yoga"
 
 SPEC CHECKSUMS:
-  boost: 7e761d76ca2ce687f7cc98e698152abd03a18f90
-  DoubleConversion: cb417026b2400c8f53ae97020b2be961b59470cb
+  boost: 1dca942403ed9342f98334bf4c3621f011aa7946
+  DoubleConversion: fea03f2699887d960129cc54bba7e52542b6f953
   fast_float: 06eeec4fe712a76acc9376682e4808b05ce978b6
   FBLazyVector: ec2eda6b55fa0e3d32b9f8bd1e6190e95c3189a4
   fmt: a40bb5bd0294ea969aaaba240a927bd33d878cdd
@@ -1948,4 +1948,4 @@ SPEC CHECKSUMS:
 
 PODFILE CHECKSUM: 8591f96a513620a2a83a0b9a125ad3fa32ea1369
 
-COCOAPODS: 1.14.3
+COCOAPODS: 1.15.2