diff --git a/src/SourceLocator/Type/AnonymousClassObjectSourceLocator.php b/src/SourceLocator/Type/AnonymousClassObjectSourceLocator.php
index 37b074d2b..3ec006321 100644
--- a/src/SourceLocator/Type/AnonymousClassObjectSourceLocator.php
+++ b/src/SourceLocator/Type/AnonymousClassObjectSourceLocator.php
@@ -29,7 +29,7 @@
 use function array_filter;
 use function assert;
 use function file_get_contents;
-use function strpos;
+use function str_contains;
 
 /** @internal */
 final class AnonymousClassObjectSourceLocator implements SourceLocator
@@ -75,7 +75,7 @@ private function getReflectionClass(Reflector $reflector, IdentifierType $identi
         /** @phpstan-var non-empty-string $fileName */
         $fileName = $this->coreClassReflection->getFileName();
 
-        if (strpos($fileName, 'eval()\'d code') !== false) {
+        if (str_contains($fileName, 'eval()\'d code')) {
             throw EvaledAnonymousClassCannotBeLocated::create();
         }
 
diff --git a/src/SourceLocator/Type/ClosureSourceLocator.php b/src/SourceLocator/Type/ClosureSourceLocator.php
index 869896c50..74cc006f1 100644
--- a/src/SourceLocator/Type/ClosureSourceLocator.php
+++ b/src/SourceLocator/Type/ClosureSourceLocator.php
@@ -29,7 +29,7 @@
 use function array_filter;
 use function assert;
 use function file_get_contents;
-use function strpos;
+use function str_contains;
 
 /** @internal */
 final class ClosureSourceLocator implements SourceLocator
@@ -70,7 +70,7 @@ private function getReflectionFunction(Reflector $reflector, IdentifierType $ide
         /** @phpstan-var non-empty-string $fileName */
         $fileName = $this->coreFunctionReflection->getFileName();
 
-        if (strpos($fileName, 'eval()\'d code') !== false) {
+        if (str_contains($fileName, 'eval()\'d code')) {
             throw EvaledClosureCannotBeLocated::create();
         }