diff --git a/packages/Testing/PHPUnit/Behavior/MultipleFilesChangedTrait.php b/packages/Testing/PHPUnit/Behavior/MultipleFilesChangedTrait.php
index ffc99cee721..3fdbd51cf4d 100644
--- a/packages/Testing/PHPUnit/Behavior/MultipleFilesChangedTrait.php
+++ b/packages/Testing/PHPUnit/Behavior/MultipleFilesChangedTrait.php
@@ -76,12 +76,21 @@ trait MultipleFilesChangedTrait
         $addedFilesWithContent = $this->removedAndAddedFilesCollector->getAddedFilesWithContent();
         $addedFiles = [];
         foreach ($addedFilesWithContent as $addedFileWithContent) {
-            $addedFiles[$addedFileWithContent->getFilePath()] = $addedFileWithContent;
+            [, $addedFilePathWithContentFilePath] = explode(
+                '_temp_fixture_easy_testing',
+                $addedFileWithContent->getFilePath()
+            );
+            $addedFiles[$addedFilePathWithContentFilePath] = $addedFileWithContent;
         }
 
         foreach ($expectedFileChanges as $path => $expectedFileChange) {
-            $addedFile = $addedFiles[$path] ?? null;
-            $this->assertSame($path, $addedFile ? $addedFile->getFilePath() : null);
+            [, $relativePath] = explode('_temp_fixture_easy_testing', $path);
+            $addedFile = $addedFiles[$relativePath] ?? null;
+            [, $addedFilePathWithContentFilePath] = $addedFile
+                ? explode('_temp_fixture_easy_testing', $addedFile->getFilePath())
+                : null;
+
+            $this->assertSame($relativePath, $addedFilePathWithContentFilePath);
             $realFileContent = $addedFile ? trim($addedFile->getFileContent()) : null;
             $this->assertSame($expectedFileChange, $realFileContent);
             if (file_exists($path)) {