diff --git a/src/Rules/ClassForbiddenNameCheck.php b/src/Rules/ClassForbiddenNameCheck.php
index 217c42443b..70249cc666 100644
--- a/src/Rules/ClassForbiddenNameCheck.php
+++ b/src/Rules/ClassForbiddenNameCheck.php
@@ -59,11 +59,12 @@ public function checkClassNames(array $pairs): array
 				$projectName = $project;
 				$withoutPrefixClassName = substr($className, strlen($prefix));
 
-				if (strpos($withoutPrefixClassName, '\\') === false) {
+				$pos = strpos($withoutPrefixClassName, '\\');
+				if ($pos === false) {
 					continue;
 				}
 
-				$withoutPrefixClassName = substr($withoutPrefixClassName, strpos($withoutPrefixClassName, '\\'));
+				$withoutPrefixClassName = substr($withoutPrefixClassName, $pos);
 			}
 
 			if ($projectName === null) {
diff --git a/src/Testing/TypeInferenceTestCase.php b/src/Testing/TypeInferenceTestCase.php
index 1793d7b1ec..4ff7d99a1a 100644
--- a/src/Testing/TypeInferenceTestCase.php
+++ b/src/Testing/TypeInferenceTestCase.php
@@ -41,8 +41,8 @@
 use function is_string;
 use function preg_match;
 use function sprintf;
+use function str_starts_with;
 use function stripos;
-use function strpos;
 use function strtolower;
 use function version_compare;
 use const PHP_VERSION;
@@ -424,7 +424,7 @@ private static function isFileLintSkipped(string $file): bool
 			}
 
 			// ignore shebang line
-			if (strpos($firstLine, '#!') === 0) {
+			if (str_starts_with($firstLine, '#!')) {
 				$firstLine = fgets($f);
 				if ($firstLine === false) {
 					return false;