kill mutations

Author: staabm

tests/Rules/PHPUnit/AttributeRequiresPhpVersionRuleTest.php

@@ -12,12 +12,20 @@
 final class AttributeRequiresPhpVersionRuleTest extends RuleTestCase
 {
 
-	private int $phpunitMajorVersion;
+	private ?int $phpunitMajorVersion;
 
-	private int $phpunitMinorVersion;
+	private ?int $phpunitMinorVersion;
 
 	private bool $deprecationRulesInstalled = true;
 
+	public function testRuleOnPHPUnitUnknown(): void
+	{
+		$this->phpunitMajorVersion = null;
+		$this->phpunitMinorVersion = null;
+
+		$this->analyse([__DIR__ . '/data/requires-php-version.php'], []);
+	}
+
 	public function testRuleOnPHPUnit115(): void
 	{
 		$this->phpunitMajorVersion = 11;