diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1052702..258da33 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,7 +8,6 @@ on:
       - 'bin/make_template'
       - 'docs/*'
       - '**/.gitignore'
-      - '.python-version'
       - 'LICENSE'
       - '*.md'
   workflow_dispatch:
diff --git a/.github/workflows/slack.yml b/.github/workflows/slack.yml
new file mode 100644
index 0000000..3198a29
--- /dev/null
+++ b/.github/workflows/slack.yml
@@ -0,0 +1,18 @@
+name: Slack
+on:
+  workflow_run:
+    workflows: [CI]
+    types: [completed]
+    branches: [main]
+jobs:
+  on-failure:
+    runs-on: ubuntu-latest
+    if: ${{ github.event.workflow_run.conclusion == 'failure' }}
+    steps:
+      - name: Post to Slack
+        uses: slackapi/slack-github-action@v1.24.0
+        with:
+          channel-id: 'C4K6M7P5E'
+          slack-message: "A workflow run failed\n*Repo:* `${{ github.event.repository.full_name }}` (${{ github.event.repository.html_url }})\n*Workflow:* ${{ github.event.workflow.name }} (${{ github.event.workflow.html_url }})\n*Branch:* `${{ github.event.workflow_run.head_branch }}`\n*Commit:* `${{ github.event.workflow_run.head_commit.id }}`\n*Run:* ${{ github.event.workflow_run.html_url }}\n*Conclusion:* ${{ github.event.workflow_run.conclusion }}"
+        env:
+          SLACK_BOT_TOKEN: ${{ secrets.SLACK_BOT_TOKEN }}
diff --git a/tox.ini b/tox.ini
index 500e248..60c81bb 100644
--- a/tox.ini
+++ b/tox.ini
@@ -18,6 +18,7 @@ setenv =
     dev: SENTRY_ENVIRONMENT = {env:SENTRY_ENVIRONMENT:dev}
     dev: NEW_RELIC_APP_NAME = {env:NEW_RELIC_APP_NAME:tox-faster}
     dev: NEW_RELIC_ENVIRONMENT = {env:NEW_RELIC_ENVIRONMENT:dev}
+    dev,tests,functests: PYTHONDEVMODE = {env:PYTHONDEVMODE:1}
     tests,functests: PYTEST_PLUGINS = tests.pytest_plugins.factory_boy
 passenv =
     HOME