diff --git a/tests/lib/Util/User/Dummy.php b/tests/lib/Util/User/Dummy.php
index 478b759970174..7106d879256eb 100644
--- a/tests/lib/Util/User/Dummy.php
+++ b/tests/lib/Util/User/Dummy.php
@@ -168,7 +168,7 @@ public function setDisplayName($uid, $displayName) {
 	}
 
 	public function getDisplayName($uid) {
-		return isset($this->displayNames[$uid])? $this->displayNames[$uid]: $uid;
+		return $this->displayNames[$uid] ?? $uid;
 	}
 
 	/**
diff --git a/tests/lib/UtilCheckServerTest.php b/tests/lib/UtilCheckServerTest.php
index 9ddb1f8e45f6f..7e47734ede772 100644
--- a/tests/lib/UtilCheckServerTest.php
+++ b/tests/lib/UtilCheckServerTest.php
@@ -30,7 +30,7 @@ protected function getConfig($systemOptions) {
 		$config->expects($this->any())
 			->method('getValue')
 			->willReturnCallback(function ($key, $default) use ($systemOptions) {
-				return isset($systemOptions[$key]) ? $systemOptions[$key] : $default;
+				return $systemOptions[$key] ?? $default;
 			});
 		return $config;
 	}