diff --git a/.github/workflows/nightly-tests.yml b/.github/workflows/nightly-tests.yml
index a55aa47d..506316fd 100644
--- a/.github/workflows/nightly-tests.yml
+++ b/.github/workflows/nightly-tests.yml
@@ -13,7 +13,7 @@ jobs:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
         php: ['8.1']
-        phpunit-branch: [main]
+        phpunit-branch: [10.0.x-dev]
 
     name: PHP ${{ matrix.php }} - ${{ matrix.os }} - ${{ matrix.phpunit-branch }}
 
@@ -33,8 +33,8 @@ jobs:
         echo "::add-matcher::${{ runner.tool_cache }}/php.json"
         echo "::add-matcher::${{ runner.tool_cache }}/phpunit.json"
 
-    - name: Install PHP dependencies with phpunit/phpunit:dev-${{ matrix.phpunit-branch }}
-      run: composer require phpunit/phpunit:dev-${{ matrix.phpunit-branch }} --ansi --no-interaction --no-progress
+    - name: Install PHP dependencies with phpunit/phpunit:${{ matrix.phpunit-branch }}
+      run: composer require phpunit/phpunit:${{ matrix.phpunit-branch }} --ansi --no-interaction --no-progress
 
     - name: Unit Tests
       run: composer test:unit