diff --git a/src/Composer/Package/Comparer/Comparer.php b/src/Composer/Package/Comparer/Comparer.php
index ed1931e82..c0ab98d9c 100644
--- a/src/Composer/Package/Comparer/Comparer.php
+++ b/src/Composer/Package/Comparer/Comparer.php
@@ -70,6 +70,7 @@ class Comparer
         if (!is_array($source)) {
             return;
         }
+        chdir($currentDirectory);
         chdir($this->update);
         $destination = $this->doTree('.', $destination);
         if (!is_array($destination)) {
diff --git a/tests/Composer/Test/Repository/Fixtures/artifacts/not-a-zip-with-zip-extension.zip b/tests/Composer/Test/Repository/Fixtures/artifacts/not-a-zip-with-zip-extension.zip
index 562f032d4..ff342b0e6 100644
Binary files a/tests/Composer/Test/Repository/Fixtures/artifacts/not-a-zip-with-zip-extension.zip and b/tests/Composer/Test/Repository/Fixtures/artifacts/not-a-zip-with-zip-extension.zip differ