diff --git a/core/modules/book/tests/src/Kernel/BookUninstallTest.php b/core/modules/book/tests/src/Kernel/BookUninstallTest.php
index 817b1335c1..d4205ebf11 100644
--- a/core/modules/book/tests/src/Kernel/BookUninstallTest.php
+++ b/core/modules/book/tests/src/Kernel/BookUninstallTest.php
@@ -76,7 +76,7 @@ public function testBookUninstall() {
 
     $book_node->delete();
     // No nodes exist therefore the book module is not required.
-    $module_data = \Drupal::service('extension.list.module')->reset()->list();
+    $module_data = \Drupal::service('extension.list.module')->reset()->getList();
     $this->assertFalse(isset($module_data['book']->info['required']), 'The book module is not required.');
 
     $node = Node::create(['title' => $this->randomString(), 'type' => $content_type->id()]);
diff --git a/core/modules/filter/tests/src/Kernel/FilterAPITest.php b/core/modules/filter/tests/src/Kernel/FilterAPITest.php
index 0760699328..d5ab64914e 100644
--- a/core/modules/filter/tests/src/Kernel/FilterAPITest.php
+++ b/core/modules/filter/tests/src/Kernel/FilterAPITest.php
@@ -488,7 +488,7 @@ public function testDependencyRemoval() {
 
     drupal_static_reset('filter_formats');
     \Drupal::entityManager()->getStorage('filter_format')->resetCache();
-    $module_data = \Drupal::service('extension.list.module')->reset()->list();
+    $module_data = \Drupal::service('extension.list.module')->reset()->getList();
     $this->assertFalse(isset($module_data['filter_test']->info['required']), 'The filter_test module is required.');
 
     // Verify that a dependency exists on the module that provides the filter
diff --git a/core/modules/system/system.module b/core/modules/system/system.module
index f54f28057c..9d70a0d00b 100644
--- a/core/modules/system/system.module
+++ b/core/modules/system/system.module
@@ -1020,14 +1020,14 @@ function _system_rebuild_module_data_ensure_required($module, &$modules) {
  *   An associative array of module information.
  *
  * @deprecated in Drupal 8.5.0 and will be removed before Drupal 9.0.0.
- *   Use \Drupal::service('extension.list.module')->reset()->list()
+ *   Use \Drupal::service('extension.list.module')->reset()->getList()
  *   instead. Note: You probably don't need the reset() method.
  *
  * @see https://www.drupal.org/node/2709919
  */
 function _system_rebuild_module_data() {
-  @trigger_error("_system_rebuild_module_data() is deprecated in Drupal 8.5.0 and will be removed before Drupal 9.0.0. Instead, you should use \\Drupal::service('extension.list.module')->reset()->list(). See https://www.drupal.org/node/2709919", E_USER_DEPRECATED);
-  return \Drupal::service('extension.list.module')->reset()->list();
+  @trigger_error("_system_rebuild_module_data() is deprecated in Drupal 8.5.0 and will be removed before Drupal 9.0.0. Instead, you should use \\Drupal::service('extension.list.module')->reset()->getList(). See https://www.drupal.org/node/2709919", E_USER_DEPRECATED);
+  return \Drupal::service('extension.list.module')->reset()->getList();
 }
 
 /**
@@ -1037,7 +1037,7 @@ function _system_rebuild_module_data() {
  *   Array of all available modules and their data.
  */
 function system_rebuild_module_data() {
-  return \Drupal::service('extension.list.module')->reset()->list();
+  return \Drupal::service('extension.list.module')->reset()->getList();
 }
 
 /**
diff --git a/core/modules/system/tests/src/Kernel/Extension/ModuleHandlerTest.php b/core/modules/system/tests/src/Kernel/Extension/ModuleHandlerTest.php
index dcad79ee13..a8767e92d5 100644
--- a/core/modules/system/tests/src/Kernel/Extension/ModuleHandlerTest.php
+++ b/core/modules/system/tests/src/Kernel/Extension/ModuleHandlerTest.php
@@ -182,7 +182,7 @@ public function testUninstallProfileDependency() {
     drupal_get_filename('profile', $profile, 'core/profiles/' . $profile . '/' . $profile . '.info.yml');
     $this->enableModules(['module_test', $profile]);
 
-    $data = \Drupal::service('extension.list.module')->reset()->list();
+    $data = \Drupal::service('extension.list.module')->reset()->getList();
     $this->assertTrue(isset($data[$profile]->requires[$dependency]));
 
     $this->moduleInstaller()->install([$dependency]);