diff --git a/src/LiveComponent/src/Test/TestLiveComponent.php b/src/LiveComponent/src/Test/TestLiveComponent.php
index 212d5b962b6..45cce6c2822 100644
--- a/src/LiveComponent/src/Test/TestLiveComponent.php
+++ b/src/LiveComponent/src/Test/TestLiveComponent.php
@@ -40,6 +40,8 @@ public function __construct(
     ) {
         $this->client->catchExceptions(false);
 
+        $data['attributes']['data-live-id'] ??= 'in-a-real-scenario-it-would-already-have-one---provide-one-yourself-if-needed';
+
         $mounted = $this->factory->create($this->metadata->getName(), $data);
         $props = $this->hydrator->dehydrate(
             $mounted->getComponent(),
diff --git a/src/LiveComponent/tests/Functional/EventListener/LiveComponentSubscriberTest.php b/src/LiveComponent/tests/Functional/EventListener/LiveComponentSubscriberTest.php
index 0216a4fa29b..4e57d2682e1 100644
--- a/src/LiveComponent/tests/Functional/EventListener/LiveComponentSubscriberTest.php
+++ b/src/LiveComponent/tests/Functional/EventListener/LiveComponentSubscriberTest.php
@@ -290,7 +290,7 @@ public function testItUseBlocksFromEmbeddedContextUsingMultipleComponents(): voi
             })
             ->post('/_components/component2/increase', [
                 'headers' => ['X-CSRF-TOKEN' => $token],
-                'body' => json_encode(['props' => $dehydrated->getProps()]),
+                'body' => ['data' => json_encode(['props' => $dehydrated->getProps()])],
             ])
             ->assertSuccessful()
             ->assertHeaderContains('Content-Type', 'html')