From b6fe0eb680a7eabdda511b6df4c0e428394654cb Mon Sep 17 00:00:00 2001
From: David Buchmann <david.buchmann@liip.ch>
Date: Fri, 2 Mar 2018 12:16:38 +0100
Subject: [PATCH 1/2] allow completely empty configuration

---
 PhpUnit/AbstractConfigurationConstraint.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/PhpUnit/AbstractConfigurationConstraint.php b/PhpUnit/AbstractConfigurationConstraint.php
index 7c28eb8..37c8852 100644
--- a/PhpUnit/AbstractConfigurationConstraint.php
+++ b/PhpUnit/AbstractConfigurationConstraint.php
@@ -33,7 +33,7 @@ protected function validateConfigurationValuesArray($configurationValues)
         }
 
         foreach ($configurationValues as $values) {
-            if (!is_array($values)) {
+            if (!is_array($values) && null !== $values) {
                 throw new \InvalidArgumentException('Configuration values should be an array of arrays');
             }
         }

From 65f2d687639a1d6bc92bac6e5f1bd759624d0e7d Mon Sep 17 00:00:00 2001
From: Tobias Nyholm <tobias.nyholm@gmail.com>
Date: Mon, 5 Mar 2018 10:18:57 +0100
Subject: [PATCH 2/2] Added changelog 3.1.1

---
 CHANGELOG.md | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 20b2f63..aa39c3c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## 3.1.1
+
+- Allow for completely empty configuration
+
 ## 3.1.0 
 
 - Support for Symfony 4