diff --git a/core/modules/system/src/Form/ModulesListForm.php b/core/modules/system/src/Form/ModulesListForm.php
index 28ff7ef4cc..c043b1b384 100644
--- a/core/modules/system/src/Form/ModulesListForm.php
+++ b/core/modules/system/src/Form/ModulesListForm.php
@@ -159,7 +159,7 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       $form['modules'][$package] += [
         '#type' => 'details',
         '#title' => $this->t($package),
-        '#open' => TRUE,
+        '#open' => FALSE,
         '#theme' => 'system_modules_details',
         '#attributes' => ['class' => ['package-listing']],
         // Ensure that the "Core" package comes first.