diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index fafa509..9bd7a08 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -20,3 +20,15 @@ jobs:
       - name: Test with pytest
         run: |
           coverage run -m pytest -s && coverage report --show-missing
+
+  notify:
+    name: Notify Slack
+    needs: build
+    if: ${{ success() || failure() }}
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: iRoachie/slack-github-actions@v2.3.2
+        if: env.SLACK_WEBHOOK_URL != null
+        env:
+          SLACK_WEBHOOK_URL: ${{ secrets.SLACK_BUILDS_WEBHOOK_URL }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/tests/test_model_taxonomy_dataframe.py b/tests/test_model_taxonomy_dataframe.py
index fbce123..15d8d37 100644
--- a/tests/test_model_taxonomy_dataframe.py
+++ b/tests/test_model_taxonomy_dataframe.py
@@ -17,7 +17,7 @@ def test_loading_mapping(self, taxon):
     @pytest.mark.parametrize("taxon", ["Aramus guarauna"], indirect=True)
     def test_nested_set_assigning(self, taxon):
         assert taxon["left"] == 7
-        assert taxon["right"] == 9
+        assert taxon["right"] == 8
 
     @pytest.mark.parametrize("taxon", ["Aramus guarauna"], indirect=True)
     def test_geo_threshold_assigning(self, taxon):