diff --git a/src/NodeTypeResolver/Reflection/BetterReflection/SourceLocatorProvider/DynamicSourceLocatorProvider.php b/src/NodeTypeResolver/Reflection/BetterReflection/SourceLocatorProvider/DynamicSourceLocatorProvider.php
index f5fc2e9dd12..8e5275cbb9e 100644
--- a/src/NodeTypeResolver/Reflection/BetterReflection/SourceLocatorProvider/DynamicSourceLocatorProvider.php
+++ b/src/NodeTypeResolver/Reflection/BetterReflection/SourceLocatorProvider/DynamicSourceLocatorProvider.php
@@ -7,6 +7,7 @@
 use PHPStan\BetterReflection\SourceLocator\Type\AggregateSourceLocator;
 use PHPStan\BetterReflection\SourceLocator\Type\SourceLocator;
 use PHPStan\Reflection\BetterReflection\SourceLocator\OptimizedDirectorySourceLocatorFactory;
+use PHPStan\Reflection\BetterReflection\SourceLocator\OptimizedSingleFileSourceLocatorFactory;
 use PHPStan\Reflection\BetterReflection\SourceLocator\OptimizedSingleFileSourceLocatorRepository;
 use Rector\Contract\DependencyInjection\ResettableInterface;
 use Rector\Testing\PHPUnit\StaticPHPUnitEnvironment;
@@ -30,7 +31,8 @@ final class DynamicSourceLocatorProvider implements ResettableInterface
 
     public function __construct(
         private readonly OptimizedDirectorySourceLocatorFactory $optimizedDirectorySourceLocatorFactory,
-        private readonly OptimizedSingleFileSourceLocatorRepository $optimizedSingleFileSourceLocatorRepository
+        private readonly OptimizedSingleFileSourceLocatorRepository $optimizedSingleFileSourceLocatorRepository,
+        private readonly OptimizedSingleFileSourceLocatorFactory $optimizedSingleFileSourceLocatorFactory
     ) {
     }
 
@@ -67,7 +69,12 @@ public function provide(): SourceLocator
         $sourceLocators = [];
 
         foreach ($this->filePaths as $file) {
-            $sourceLocators[] = $this->optimizedSingleFileSourceLocatorRepository->getOrCreate($file);
+            // under PHPUnit each fixture is a throwaway temp file that is deleted after the test;
+            // the shared repository caches locators by path forever, so a stale locator for a since-deleted
+            // file can leak into a later test. build a fresh locator per run there, keep caching in production
+            $sourceLocators[] = $isPHPUnitRun
+                ? $this->optimizedSingleFileSourceLocatorFactory->create($file)
+                : $this->optimizedSingleFileSourceLocatorRepository->getOrCreate($file);
         }
 
         foreach ($this->directories as $directory) {