diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5e42465a..e5a9a2ae 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -22,3 +22,16 @@ jobs:
           verbose: true
         env:
           CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
+
+      - name: Delete existing coverage report
+        run: rm coverage.json
+
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v4
+        with:
+          file: fake-file.txt
+          flags: fake
+          plugins: noop
+          verbose: true
+        env:
+          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
diff --git a/app/calculator.py b/app/calculator.py
index 4f380e8e..7706f71a 100644
--- a/app/calculator.py
+++ b/app/calculator.py
@@ -14,3 +14,5 @@ def divide(x, y):
             return 'Cannot divide by 0'
         return x * 1.0 / y
 
+    def smiles():
+        return ':)'
diff --git a/codecov.yml b/codecov.yml
index 1ed5513f..a17aedfc 100644
--- a/codecov.yml
+++ b/codecov.yml
@@ -11,3 +11,7 @@ cli:
   plugins:
     pycoverage:
       report_type: "json"
+
+codecov:
+  notify:
+    notify_error: true
diff --git a/fake-file.txt b/fake-file.txt
new file mode 100644
index 00000000..5ef6fd01
--- /dev/null
+++ b/fake-file.txt
@@ -0,0 +1 @@
+thisisnotacoveragereport