diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 393381c..e590ccd 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -29,8 +29,8 @@ jobs:
         uses: actions/cache@v3
         with:
           path: ${{ steps.composer-cache.outputs.dir }}
-          key: ${{ matrix.php-versions }}-composer-${{ hashFiles('**/composer.json') }}
-          restore-keys: ${{ matrix.php-versions }}-composer-
+          key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.json') }}
+          restore-keys: ${{ runner.os }}-composer-
 
       - name: Remove composer.lock
         run: rm -f composer.lock
diff --git a/.github/workflows/qa.yml b/.github/workflows/qa.yml
index 2c7a7d7..ac17596 100644
--- a/.github/workflows/qa.yml
+++ b/.github/workflows/qa.yml
@@ -44,9 +44,7 @@ jobs:
       - name: Compute Coverage
         run: vendor/bin/phpunit --coverage-clover ./coverage.xml
 
-      - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v3
+      - name: Upload coverage reports to Codecov
+        uses: codecov/codecov-action@v4.0.1
         with:
-          files: ./coverage.xml
-          flags: unittests
-          name: codecov-laravel-dt0
+          token: ${{ secrets.CODECOV_TOKEN }}
diff --git a/README.md b/README.md
index 37a5aa5..783f9b9 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # Laravel Dt0
 
-[![CI](https://github.com/fab2s/laravel-dt0/actions/workflows/ci.yml/badge.svg)](https://github.com/fab2s/laravel-dt0/actions/workflows/ci.yml) [![QA](https://github.com/fab2s/laravel-dt0/actions/workflows/qa.yml/badge.svg)](https://github.com/fab2s/laravel-dt0/actions/workflows/qa.yml)
+[![CI](https://github.com/fab2s/laravel-dt0/actions/workflows/ci.yml/badge.svg)](https://github.com/fab2s/laravel-dt0/actions/workflows/ci.yml) [![QA](https://github.com/fab2s/laravel-dt0/actions/workflows/qa.yml/badge.svg)](https://github.com/fab2s/laravel-dt0/actions/workflows/qa.yml) [![codecov](https://codecov.io/gh/fab2s/laravel-dt0/graph/badge.svg?token=YE6AYEDA64)](https://codecov.io/gh/fab2s/laravel-dt0) [![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg?style=flat)](http://makeapullrequest.com) [![License](http://poser.pugx.org/fab2s/dt0/license)](https://packagist.org/packages/fab2s/dt0)
 
 Laravel support for [fab2s/dt0](https://github.com/fab2s/dt0), a DTO (_Data-Transport-Object_) PHP implementation than can both secure mutability and implement convenient ways to take control over input and output in various formats.
 
diff --git a/tests/Casts/Dt0castTest.php b/tests/Casts/Dt0CastTest.php
similarity index 99%
rename from tests/Casts/Dt0castTest.php
rename to tests/Casts/Dt0CastTest.php
index f3387da..3f67404 100644
--- a/tests/Casts/Dt0castTest.php
+++ b/tests/Casts/Dt0CastTest.php
@@ -19,7 +19,7 @@
 use JsonException;
 use PHPUnit\Framework\Attributes\DataProvider;
 
-class Dt0castTest extends TestCase
+class Dt0CastTest extends TestCase
 {
     /**
      * @param DumbDt0|class-string<NotNullableException>|null $expected