diff --git a/tests/src/Kernel/IndexStorageTest.php b/tests/src/Kernel/IndexStorageTest.php
index 0e89a46..bab7e78 100644
--- a/tests/src/Kernel/IndexStorageTest.php
+++ b/tests/src/Kernel/IndexStorageTest.php
@@ -64,7 +64,12 @@ class IndexStorageTest extends KernelTestBase {
     $indexData = array(
       'id' => 'test',
       'name' => 'Index test name',
-      'tracker' => 'default',
+      'tracker' => array(
+        'default' => array(
+          'plugin_id' => 'default',
+          'settings' => array(),
+        )
+      ),
     );
 
     $index = $this->storage->create($indexData);
diff --git a/tests/src/Kernel/ServerTaskTest.php b/tests/src/Kernel/ServerTaskTest.php
index e83a87f..a3faf29 100644
--- a/tests/src/Kernel/ServerTaskTest.php
+++ b/tests/src/Kernel/ServerTaskTest.php
@@ -97,7 +97,12 @@ class ServerTaskTest extends KernelTestBase {
           'settings' => array(),
         ),
       ),
-      'tracker' => 'default',
+      'tracker' => array(
+        'default' => array(
+          'plugin_id' => 'default',
+          'settings' => array(),
+        )
+      ),
       'server' => $this->server->id(),
       'options' => array('index_directly' => FALSE),
     ));