From 6ad016ca953f93cc4566fb0f3881e78b856f2f2c Mon Sep 17 00:00:00 2001
From: Jakub Zalas <jakub@zalas.pl>
Date: Mon, 6 Apr 2020 11:48:26 +0100
Subject: [PATCH] Update the method definition to match the one in updated
 phpunit

---
 src/TestCase/TestDoubles.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/TestCase/TestDoubles.php b/src/TestCase/TestDoubles.php
index c04fe9e..08f0088 100644
--- a/src/TestCase/TestDoubles.php
+++ b/src/TestCase/TestDoubles.php
@@ -15,7 +15,7 @@ trait TestDoubles
 {
     abstract public function getMockBuilder(string $className): MockBuilder;
 
-    abstract protected function prophesize($classOrInterface = null): ObjectProphecy;
+    abstract protected function prophesize(?string $classOrInterface = null): ObjectProphecy;
 
     /**
      * @before