core/modules/rest/config/schema/rest.schema.yml |  5 +++++
 core/modules/rest/rest.install                  | 25 +++++++++++++++++++++++++
 2 files changed, 30 insertions(+)

diff --git a/core/modules/rest/config/schema/rest.schema.yml b/core/modules/rest/config/schema/rest.schema.yml
index 467ae5b..7c9e650 100644
--- a/core/modules/rest/config/schema/rest.schema.yml
+++ b/core/modules/rest/config/schema/rest.schema.yml
@@ -1,3 +1,8 @@
+# Make non-REST update path tests pass.
+# @todo Remove this when those update path tests from 8.0.0 to the last 8.x minor before 9.0.0 have been removed.
+rest.settings:
+  type: config_object
+
 # Method-level granularity of REST resource configuration.
 rest_resource.method:
   type: mapping
diff --git a/core/modules/rest/rest.install b/core/modules/rest/rest.install
index c2d9412..69384b0 100644
--- a/core/modules/rest/rest.install
+++ b/core/modules/rest/rest.install
@@ -24,3 +24,28 @@ function rest_requirements($phase) {
   }
   return $requirements;
 }
+
+/**
+ * Make non-REST update path tests pass.
+ *
+ * @todo Remove this when those update path tests from 8.0.0 to the last 8.x minor before 9.0.0 have been removed.
+ */
+function rest_update_8201() {
+  \Drupal::entityDefinitionUpdateManager()->installEntityType(new ConfigEntityType([
+    'id' => 'rest_resource_config',
+    'label' => new TranslatableMarkup('REST resource configuration'),
+    'config_prefix' => 'resource',
+    'admin_permission' => 'administer rest resources',
+    'label_callback' => 'getLabelFromPlugin',
+    'entity_keys' => ['id' => 'id'],
+    'config_export' => [
+      'id',
+      'plugin_id',
+      'granularity',
+      'configuration',
+    ],
+  ]));
+  \Drupal::configFactory()->getEditable('rest.settings')
+    ->clear('resources')
+    ->save();
+}