diff --git a/admin/tool/phpunit/cli/util.php b/admin/tool/phpunit/cli/util.php
index 13dcacc03fe..a4da37456fe 100644
--- a/admin/tool/phpunit/cli/util.php
+++ b/admin/tool/phpunit/cli/util.php
@@ -50,16 +50,13 @@ list($options, $unrecognized) = cli_get_params(
     )
 );
 
-if (file_exists(__DIR__.'/../../../../vendor/phpunit/phpunit/PHPUnit/Autoload.php')) {
+if (file_exists(__DIR__.'/../../../../vendor/phpunit/phpunit/composer.json')) {
     // Composer packages present.
     require_once(__DIR__.'/../../../../vendor/autoload.php');
-    require_once(__DIR__.'/../../../../vendor/phpunit/phpunit/PHPUnit/Autoload.php');
 
 } else {
-    // Verify PHPUnit PEAR libs can be loaded.
-    if (!include('PHPUnit/Autoload.php')) {
-        phpunit_bootstrap_error(PHPUNIT_EXITCODE_PHPUNITMISSING);
-    }
+    // Note: installation via PEAR is not supported any more.
+    phpunit_bootstrap_error(PHPUNIT_EXITCODE_PHPUNITMISSING);
 }
 
 if ($options['install'] or $options['drop']) {
diff --git a/lib/phpunit/lib.php b/lib/phpunit/lib.php
index 86f8e413434..e01c804224f 100644
--- a/lib/phpunit/lib.php
+++ b/lib/phpunit/lib.php
@@ -25,9 +25,6 @@
 
 // NOTE: MOODLE_INTERNAL is not verified here because we load this before setup.php!
 
-require_once('PHPUnit/Autoload.php');
-require_once('PHPUnit/Extensions/Database/Autoload.php');
-
 require_once(__DIR__.'/classes/util.php');
 require_once(__DIR__.'/classes/event_mock.php');
 require_once(__DIR__.'/classes/event_sink.php');