diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d28bc13..84124eb 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -9,29 +9,20 @@ jobs:
     strategy:
       matrix:
         include:
-          - operating-system: 'ubuntu-20.04'
+          - operating-system: 'ubuntu-latest'
             php-version: '7.1'
 
-          - operating-system: 'ubuntu-20.04'
+          - operating-system: 'ubuntu-latest'
             php-version: '7.2'
 
-          - operating-system: 'ubuntu-20.04'
+          - operating-system: 'ubuntu-latest'
             php-version: '7.3'
 
-          - operating-system: 'ubuntu-20.04'
+          - operating-system: 'ubuntu-latest'
             php-version: '7.4'
 
-          - operating-system: 'ubuntu-20.04'
+          - operating-system: 'ubuntu-latest'
             php-version: '8.0'
-            composer-flags: '--ignore-platform-req=php'
-
-          - operating-system: 'windows-latest'
-            php-version: '7.4'
-            job-description: 'on Windows'
-
-          - operating-system: 'macos-latest'
-            php-version: '7.4'
-            job-description: 'on macOS'
 
     name: PHP ${{ matrix.php-version }} ${{ matrix.job-description }}
 
@@ -47,7 +38,6 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Install libuv
-        if: matrix.os == 'ubuntu-20.04'
         run: sudo apt-get install libuv1-dev
 
       - name: Setup PHP