diff --git a/tests/php_test_files/composer.json b/tests/php_test_files/composer.json
index f5906937..e82f0971 100644
--- a/tests/php_test_files/composer.json
+++ b/tests/php_test_files/composer.json
@@ -2,7 +2,7 @@
 	"minimum-stability": "dev",
 	"prefer-stable": true,
 	"require": {
-		"temporal/sdk": "^2.15.1",
+		"temporal/sdk": "^2.16.0",
 		"spiral/roadrunner-kv": "^4.0"
 	},
 	"name": "test/test",
diff --git a/tests/php_test_files/src/Workflow/CancelSignaledChildWorkflow.php b/tests/php_test_files/src/Workflow/CancelSignaledChildWorkflow.php
index 1f9d267c..9a7b1424 100644
--- a/tests/php_test_files/src/Workflow/CancelSignaledChildWorkflow.php
+++ b/tests/php_test_files/src/Workflow/CancelSignaledChildWorkflow.php
@@ -35,7 +35,7 @@ function () use ($simple, $waitSignaled) {
 
                 yield $simple->add(8);
                 $this->status[] = 'child signaled';
-                $waitSignaled->resolve();
+                $waitSignaled->resolve(null);
 
                 return yield $call;
             }