diff --git a/.gitea/workflows/test-fixturenet-eth.yml b/.gitea/workflows/test-fixturenet-eth.yml
index 195a683..f4d6d9f 100644
--- a/.gitea/workflows/test-fixturenet-eth.yml
+++ b/.gitea/workflows/test-fixturenet-eth.yml
@@ -3,6 +3,7 @@ name: Test Ethereum Fixturenet Stack
 on:
   push:
     branches: '*'
+  pull_request:
   schedule: # Note: coordinate with other tests to not overload runners at the same time of day
     - cron: '12 01 * * *'
 
@@ -33,3 +34,20 @@ jobs:
         run: |
          PATH=$PATH:~/bin
          ./tests/fixturenet-eth-stack/run-test.sh
+
+      - name: Notify Vulcanize Slack on CI failure
+        if: ${{ always() && github.ref_name == 'main' }}
+        uses: ravsamhq/notify-slack-action@v2
+        with:
+          status: ${{ job.status }}
+          notify_when: 'failure'
+        env:
+          SLACK_WEBHOOK_URL: ${{ secrets.VULCANIZE_SLACK_CI_ALERTS }}
+      - name: Notify DeepStack Slack on CI failure
+        if: ${{ always() && github.ref_name == 'main' }}
+        uses: ravsamhq/notify-slack-action@v2
+        with:
+          status: ${{ job.status }}
+          notify_when: 'failure'
+        env:
+          SLACK_WEBHOOK_URL: ${{ secrets.DEEPSTACK_SLACK_CI_ALERTS }}
diff --git a/.gitea/workflows/test-fixturenet-plugeth.yml b/.gitea/workflows/test-fixturenet-plugeth.yml
index 462b8e8..4973c2f 100644
--- a/.gitea/workflows/test-fixturenet-plugeth.yml
+++ b/.gitea/workflows/test-fixturenet-plugeth.yml
@@ -3,13 +3,17 @@ name: Test Ethereum Plugeth Fixturenet Stack
 on:
   push:
     branches: '*'
+  pull_request:
   schedule: # Note: coordinate with other tests to not overload runners at the same time of day
     - cron: '14 01 * * *'
 
 jobs:
   test:
     name: "Test fixturenet-plugeth stack"
-    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        os: [ubuntu-latest, ubuntu-latest-arm]
+    runs-on: ${{ matrix.os }}
     steps:
       - name: "Clone project repository"
         uses: actions/checkout@v3
@@ -19,12 +23,12 @@ jobs:
         if: ${{ runner.arch == 'arm64' && runner.os == 'Linux' }}
         uses: deadsnakes/action@v3.0.1
         with:
-          python-version: '3.11'
+          python-version: 3.11
       - name: "Install Python cases other than ARM on Linux"
         if: ${{ ! (runner.arch == 'arm64' && runner.os == 'Linux') }}
         uses: actions/setup-python@v4
         with:
-          python-version: '3.11'
+          python-version: 3.11
       - name: "Print Python version"
         run: python3 --version
       - name: "Install stack orchestrator"
@@ -33,3 +37,20 @@ jobs:
         run: |
          PATH=$PATH:~/bin
          ./tests/fixturenet-plugeth-stack/run-test.sh
+
+      - name: Notify Vulcanize Slack on CI failure
+        if: ${{ always() && github.ref_name == 'main' }}
+        uses: ravsamhq/notify-slack-action@v2
+        with:
+          status: ${{ job.status }}
+          notify_when: 'failure'
+        env:
+          SLACK_WEBHOOK_URL: ${{ secrets.VULCANIZE_SLACK_CI_ALERTS }}
+      - name: Notify DeepStack Slack on CI failure
+        if: ${{ always() && github.ref_name == 'main' }}
+        uses: ravsamhq/notify-slack-action@v2
+        with:
+          status: ${{ job.status }}
+          notify_when: 'failure'
+        env:
+          SLACK_WEBHOOK_URL: ${{ secrets.DEEPSTACK_SLACK_CI_ALERTS }}