diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index afcd4303a..20335c718 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -51,6 +51,11 @@ jobs:
         run: |
           bun run test
 
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v4
+        env:
+          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
+
   unit_tests:
     name: Unit tests
     runs-on: ubuntu-latest
@@ -100,6 +105,11 @@ jobs:
           name: rspec-results-${{ github.job }}-${{ strategy.job-index }}
           path: tmp/rspec_${{ github.job }}_${{ strategy.job-index }}.junit.xml
 
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v4
+        env:
+          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
+
   system_tests:
     name: System tests
     runs-on: ubuntu-latest
@@ -144,6 +154,11 @@ jobs:
           name: rspec-results-${{ github.job }}-${{ strategy.job-index }}
           path: tmp/rspec_${{ github.job }}_${{ strategy.job-index }}.junit.xml
 
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v4
+        env:
+          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
+
   save_test_reports:
     name: Save test reports
     needs: [unit_tests, system_tests]
diff --git a/.simplecov b/.simplecov
index 3c98b20b7..547890773 100644
--- a/.simplecov
+++ b/.simplecov
@@ -5,10 +5,15 @@ SimpleCov.start "rails" do
 
   command_name "RSpec process #{Process.pid}"
 
-  formatter SimpleCov::Formatter::MultiFormatter.new([
-    SimpleCov::Formatter::SimpleFormatter,
-    SimpleCov::Formatter::HTMLFormatter
-  ])
+  if ENV["CI"] # codecov compatibility
+    require 'simplecov-cobertura'
+    formatter SimpleCov::Formatter::CoberturaFormatter
+  else
+    formatter SimpleCov::Formatter::MultiFormatter.new([
+      SimpleCov::Formatter::SimpleFormatter,
+      SimpleCov::Formatter::HTMLFormatter
+    ])
+  end
 
   add_filter "/channels/" # not used
   groups.delete("Channels")