Yash Rode
--- a/tests/src/Kernel/ReadinessTraitTest.php
+++ b/tests/src/Kernel/ReadinessTraitTest.php
      ValidationResult::createError(['Boo!']),
      ValidationResult::createWarning(['Moo!']),
    ];
-    $this->assertSame(SystemManager::REQUIREMENT_ERROR, $this->getOverallSeverity($results));
+    $this->assertSame(SystemManager::REQUIREMENT_ERROR, ValidationResult::getOverallSeverity($results));