diff --git a/.circleci/config.yml b/.circleci/config.yml
index d9b17328..544cde9e 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -1,8 +1,5 @@
 version: 2.1
 
-orbs:
-  codecov: codecov/codecov@4.1.0
-
 executors:
   executor_node_18:
     docker:
@@ -114,14 +111,6 @@ jobs:
       - command_checkout_cache_install
       - command_test_and_build
 
-  job_upload_coverage:
-    description: Upload coverage to Codecov
-    executor: executor_node_20
-    steps:
-      - command_restore_workspace
-      - codecov/upload:
-          file: coverage/*.json
-
   job_publish_to_npm:
     description: Publish package to npm
     executor: executor_node_20
@@ -175,16 +164,6 @@ workflows:
             branches:
               only: /.*/
 
-      - job_upload_coverage:
-          requires:
-            - job_node_18_test_and_build
-            - job_node_20_test_and_build
-            - job_node_21_test_and_build
-            - job_node_22_test_and_build
-          filters:
-            branches:
-              only: /main/
-
       - job_publish_to_npm:
           context: npm
           requires:
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b769a02c..6dd71aac 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -17,14 +17,30 @@ jobs:
     uses: './.github/workflows/lint-test-build.yml'
 
   job_upload_coverage:
-    name: Upload Coverage
+    name: Upload Coverage Report to Codecov
 
     runs-on: ubuntu-latest
     if: github.event_name == 'push' && github.ref_type == 'branch'
     needs: job_lint_test_build
 
     steps:
-      - run: echo "not implemented yet..."
+      - name: Checkout, Setup Node.js v${{ env.NODE_VERSION }} and Install dependencies
+        uses: manferlo81/action-checkout-node-install@v0
+        with:
+          node-version: ${{ env.NODE_VERSION }}
+        env:
+          NODE_VERSION: 20.x
+
+      - name: Collect Coverage
+        run: npm test
+        env:
+          COVERAGE: CI
+
+      - name: Upload Coverage Report
+        uses: codecov/codecov-action@v4
+        with:
+          directory: coverage
+          token: ${{ secrets.CODECOV_TOKEN }}
 
   job_create_release:
     name: Create GitHub Release
diff --git a/.github/workflows/lint-test-build.yml b/.github/workflows/lint-test-build.yml
index 7069a5f6..d4488739 100644
--- a/.github/workflows/lint-test-build.yml
+++ b/.github/workflows/lint-test-build.yml
@@ -50,7 +50,7 @@ jobs:
       - name: Test
         run: npm test
         env:
-          SKIP_COVERAGE: true
+          COVERAGE: SKIP
 
       - name: Build
         run: npm run build
diff --git a/jest.config.mjs b/jest.config.mjs
index e42fbc8a..f94bb8f3 100644
--- a/jest.config.mjs
+++ b/jest.config.mjs
@@ -1,14 +1,16 @@
+const { COVERAGE } = process.env;
+
 /** @type { import("jest").Config } */
 const config = {
   cacheDirectory: 'node_modules/.cache/jest',
   preset: 'ts-jest',
 
-  collectCoverage: !process.env.SKIP_COVERAGE,
+  collectCoverage: COVERAGE !== 'SKIP',
   collectCoverageFrom: [
     'src/**/*.ts',
   ],
   coverageDirectory: 'coverage',
-  coverageReporters: process.env.CI
+  coverageReporters: COVERAGE === 'CI'
     ? ['json', 'clover', 'cobertura']
     : ['html', 'text'],