diff --git a/composer.json b/composer.json
index 6c4c31a6..1a210510 100644
--- a/composer.json
+++ b/composer.json
@@ -26,7 +26,7 @@
         "doctrine/coding-standard": "^8.2.0",
         "infection/infection": "^0.16.4",
         "php-standard-library/psalm-plugin": "^1.1",
-        "phpunit/phpunit": "^9.2.6",
+        "phpunit/phpunit": "^9.5",
         "roave/security-advisories": "dev-master",
         "squizlabs/php_codesniffer": "^3.6.0",
         "vimeo/psalm": "^4.7"
diff --git a/composer.lock b/composer.lock
index 6cc8b883..56540c5d 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "92c62d968f24dce0f4201786a22aa910",
+    "content-hash": "c294b928d0fcb3386b49039ba25a00f5",
     "packages": [
         {
             "name": "azjezz/psl",
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index b4acd2c7..fae9d95a 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -1,9 +1,9 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <phpunit
-    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-    xsi:noNamespaceSchemaLocation="vendor/phpunit/phpunit/phpunit.xsd"
-    bootstrap="vendor/autoload.php"
-    colors="true"
+        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+        xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd"
+        bootstrap="vendor/autoload.php"
+        colors="true"
 >
     <testsuites>
         <testsuite name="unit">
@@ -13,12 +13,14 @@
             <directory>./test/e2e</directory>
         </testsuite>
     </testsuites>
-    <filter>
-        <whitelist processUncoveredFilesFromWhitelist="true">
+
+    <coverage processUncoveredFiles="true">
+        <include>
             <directory suffix=".php">./src</directory>
-        </whitelist>
-    </filter>
+        </include>
+    </coverage>
+
     <php>
-        <ini name="error_reporting" value="E_ALL"/>
+      <ini name="error_reporting" value="E_ALL"/>
     </php>
 </phpunit>
diff --git a/src/Command/AssertBackwardsCompatible.php b/src/Command/AssertBackwardsCompatible.php
index 92bae300..45e56d14 100644
--- a/src/Command/AssertBackwardsCompatible.php
+++ b/src/Command/AssertBackwardsCompatible.php
@@ -141,7 +141,11 @@ public function execute(InputInterface $input, OutputInterface $output): int
 
         $toRevision = $this->parseRevision->fromStringForRepository($to, $sourceRepo);
 
-        $stdErr->writeln(Str\format('Comparing from %s to %s...', (string) $fromRevision, (string) $toRevision));
+        $stdErr->writeln(Str\format(
+            'Comparing from %s to %s...',
+            Type\string()->coerce($fromRevision),
+            Type\string()->coerce($toRevision)
+        ));
 
         $fromPath = $this->git->checkout($sourceRepo, $fromRevision);
         $toPath   = $this->git->checkout($sourceRepo, $toRevision);
diff --git a/test/e2e/Command/AssertBackwardsCompatibleTest.php b/test/e2e/Command/AssertBackwardsCompatibleTest.php
index 35c54d0e..20a907fc 100644
--- a/test/e2e/Command/AssertBackwardsCompatibleTest.php
+++ b/test/e2e/Command/AssertBackwardsCompatibleTest.php
@@ -173,7 +173,7 @@ public function testWillAllowSpecifyingGitRevision() : void
 
 EXPECTED
                 ,
-                $exception->getOutput() // @TODO https://github.com/Roave/BackwardCompatibilityCheck/issues/79 this looks like a symfony bug - we shouldn't check STDERR, but STDOUT
+                $exception->getErrorOutput() // @TODO https://github.com/Roave/BackwardCompatibilityCheck/issues/79 this looks like a symfony bug - we shouldn't check STDERR, but STDOUT
             );
         }
     }
@@ -199,7 +199,7 @@ public function testWillRunSuccessfullyOnNoBcBreaks() : void
             '-vvv',
         ], $this->sourcesRepository);
 
-        self::assertStringContainsString('No backwards-incompatible changes detected', $output);
+        self::assertEmpty($output);
     }
 
     public function testWillPickTaggedVersionOnNoGivenFrom() : void