diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 81a13906604..1e61c7d650e 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -262,7 +262,7 @@ jobs:
         run: ant phar-snapshot
 
       - name: Check whether PHAR is scoped
-        run: grep -q PHPUnit\\\\DeepCopy\\\\Exception\\\\CloneException build/artifacts/phpunit-snapshot.phar || (echo "phpunit-snapshot.phar is not scoped." && false)
+        run: grep -q PHPUnitPHAR\\\\DeepCopy\\\\Exception\\\\CloneException build/artifacts/phpunit-snapshot.phar || (echo "phpunit-snapshot.phar is not scoped." && false)
 
       - name: Upload PHAR
         uses: actions/upload-artifact@v4
diff --git a/build.xml b/build.xml
index bc74b8e9fdf..3b7e489e9fb 100644
--- a/build.xml
+++ b/build.xml
@@ -361,18 +361,16 @@
             <arg value="--no-interaction" />
             <arg value="--output-dir" />
             <arg path="${basedir}/build/tmp/phar-scoped" />
-            <arg value="--prefix" />
-            <arg value="PHPUnit" />
             <arg path="${basedir}/build/tmp/phar" />
         </exec>
 
-        <replace file="${basedir}/build/tmp/phar-scoped/phpunit/Util/PHP/Template/PhptTestCase.tpl"   token="SebastianBergmann\CodeCoverage\CodeCoverage" value="PHPUnit\SebastianBergmann\CodeCoverage\CodeCoverage"/>
-        <replace file="${basedir}/build/tmp/phar-scoped/phpunit/Util/PHP/Template/PhptTestCase.tpl"   token="SebastianBergmann\CodeCoverage\Driver\Selector" value="PHPUnit\SebastianBergmann\CodeCoverage\Driver\Selector"/>
-        <replace file="${basedir}/build/tmp/phar-scoped/phpunit/Util/PHP/Template/PhptTestCase.tpl"   token="SebastianBergmann\CodeCoverage\Filter" value="PHPUnit\SebastianBergmann\CodeCoverage\Filter"/>
-        <replace file="${basedir}/build/tmp/phar-scoped/phpunit/Util/PHP/Template/TestCaseClass.tpl"  token="SebastianBergmann\CodeCoverage\CodeCoverage" value="PHPUnit\SebastianBergmann\CodeCoverage\CodeCoverage"/>
-        <replace file="${basedir}/build/tmp/phar-scoped/phpunit/Util/PHP/Template/TestCaseClass.tpl"  token="SebastianBergmann\CodeCoverage\Driver\Selector" value="PHPUnit\SebastianBergmann\CodeCoverage\Driver\Selector"/>
-        <replace file="${basedir}/build/tmp/phar-scoped/phpunit/Util/PHP/Template/TestCaseMethod.tpl" token="SebastianBergmann\CodeCoverage\CodeCoverage" value="PHPUnit\SebastianBergmann\CodeCoverage\CodeCoverage"/>
-        <replace file="${basedir}/build/tmp/phar-scoped/phpunit/Util/PHP/Template/TestCaseMethod.tpl" token="SebastianBergmann\CodeCoverage\Driver\Selector" value="PHPUnit\SebastianBergmann\CodeCoverage\Driver\Selector"/>
+        <replace file="${basedir}/build/tmp/phar-scoped/phpunit/Util/PHP/Template/PhptTestCase.tpl"   token="SebastianBergmann\CodeCoverage\CodeCoverage" value="PHPUnitPHAR\SebastianBergmann\CodeCoverage\CodeCoverage"/>
+        <replace file="${basedir}/build/tmp/phar-scoped/phpunit/Util/PHP/Template/PhptTestCase.tpl"   token="SebastianBergmann\CodeCoverage\Driver\Selector" value="PHPUnitPHAR\SebastianBergmann\CodeCoverage\Driver\Selector"/>
+        <replace file="${basedir}/build/tmp/phar-scoped/phpunit/Util/PHP/Template/PhptTestCase.tpl"   token="SebastianBergmann\CodeCoverage\Filter" value="PHPUnitPHAR\SebastianBergmann\CodeCoverage\Filter"/>
+        <replace file="${basedir}/build/tmp/phar-scoped/phpunit/Util/PHP/Template/TestCaseClass.tpl"  token="SebastianBergmann\CodeCoverage\CodeCoverage" value="PHPUnitPHAR\SebastianBergmann\CodeCoverage\CodeCoverage"/>
+        <replace file="${basedir}/build/tmp/phar-scoped/phpunit/Util/PHP/Template/TestCaseClass.tpl"  token="SebastianBergmann\CodeCoverage\Driver\Selector" value="PHPUnitPHAR\SebastianBergmann\CodeCoverage\Driver\Selector"/>
+        <replace file="${basedir}/build/tmp/phar-scoped/phpunit/Util/PHP/Template/TestCaseMethod.tpl" token="SebastianBergmann\CodeCoverage\CodeCoverage" value="PHPUnitPHAR\SebastianBergmann\CodeCoverage\CodeCoverage"/>
+        <replace file="${basedir}/build/tmp/phar-scoped/phpunit/Util/PHP/Template/TestCaseMethod.tpl" token="SebastianBergmann\CodeCoverage\Driver\Selector" value="PHPUnitPHAR\SebastianBergmann\CodeCoverage\Driver\Selector"/>
 
         <copy file="${basedir}/.phpstorm.meta.php" tofile="${basedir}/build/tmp/phar-scoped/.phpstorm.meta.php"/>
 
diff --git a/build/config/php-scoper.php b/build/config/php-scoper.php
index c783a25f5d2..dc7dcb42183 100644
--- a/build/config/php-scoper.php
+++ b/build/config/php-scoper.php
@@ -9,10 +9,13 @@
  */
 
 return [
+    'prefix' => 'PHPUnitPHAR',
+
     'exclude-namespaces' => [
         'PHPUnit',
         'Prophecy'
     ],
+
     'expose-constants' => [
         '/^__PHPUNIT_.+$/'
     ],