diff --git a/course/tests/courselib_test.php b/course/tests/courselib_test.php
index 8021886e338..5d4d1d42385 100644
--- a/course/tests/courselib_test.php
+++ b/course/tests/courselib_test.php
@@ -2008,7 +2008,10 @@ final class courselib_test extends advanced_testcase {
 
         // Create the XML file we want to use.
         $course->category = (array)$course->category;
-        $imstestcase = new imsenterprise_test();
+
+        // Note: this is a violation of component communication principles.
+        // TODO MDL-83789.
+        $imstestcase = new imsenterprise_test('courselib_imsenterprise_test');
         $imstestcase->imsplugin = enrol_get_plugin('imsenterprise');
         $imstestcase->set_test_config();
         $imstestcase->set_xml_file(false, array($course));
diff --git a/lib/phpunit/classes/advanced_testcase.php b/lib/phpunit/classes/advanced_testcase.php
index 9c4d6488cc8..b2fd06cfd4a 100644
--- a/lib/phpunit/classes/advanced_testcase.php
+++ b/lib/phpunit/classes/advanced_testcase.php
@@ -49,7 +49,7 @@ abstract class advanced_testcase extends base_testcase {
      *
      * @param string $name
      */
-    final public function __construct(string $name = null) {
+    final public function __construct(string $name) {
         parent::__construct($name);
 
         $this->setBackupGlobals(false);