diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 7e06c2c..0df6817 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -27,7 +27,7 @@ jobs:
       fail-fast: false
       matrix:
         os:
-          - ubuntu-latest
+          - ubuntu-26.04
         php-version:
           - '8.4'
           - '8.5'
@@ -67,10 +67,3 @@ jobs:
       - name: PHPUnit
         run: |
           vendor/bin/phpunit --colors --display-all-issues --coverage-text --coverage-clover coverage/clover.xml
-
-      - name: Upload coverage
-        uses: codecov/codecov-action@v6
-        if: success()
-        with:
-          token: ${{ secrets.CODECOV_TOKEN }}
-          files: ./coverage/clover.xml
diff --git a/README.md b/README.md
index c330160..265b3e1 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,6 @@
 [![Packagist Downloads](https://img.shields.io/packagist/dt/rancoud/Prometheus)](https://packagist.org/packages/rancoud/Prometheus)
 [![Composer dependencies](https://img.shields.io/badge/dependencies-0-brightgreen)](https://github.com/rancoud/Prometheus/blob/main/composer.json)
 [![Test workflow](https://img.shields.io/github/actions/workflow/status/rancoud/Prometheus/test.yml?branch=main)](https://github.com/rancoud/Prometheus/actions/workflows/test.yml)
-[![Codecov](https://img.shields.io/codecov/c/github/rancoud/Prometheus?logo=codecov)](https://codecov.io/gh/rancoud/Prometheus)
 
 Prometheus client library using database, memory storage.