diff --git a/CHANGES.md b/CHANGES.md
index 177fc96..793c1a4 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -4,6 +4,10 @@ moodle-local_profilecohort
 Changes
 -------
 
+### Unreleased
+
+* 2024-10-27 - Tests: Call parent setup() function when instantiating PHPUnit tests.
+
 ### v4.1-r5
 
 * 2024-08-20 - Remove duplicate header on overview page.
diff --git a/tests/rules_test.php b/tests/rules_test.php
index 94ba9e9..ba08e23 100644
--- a/tests/rules_test.php
+++ b/tests/rules_test.php
@@ -73,6 +73,9 @@ public function setUp(): void {
         $this->cohortids[] = $this->getDataGenerator()->create_cohort(['component' => 'local_profilecohort'])->id;
 
         $this->resetAfterTest();
+
+        // Call parent setup.
+        parent::setUp();
     }
 
     /**