diff --git a/Firestore/composer.json b/Firestore/composer.json
index fb2186c44002..43447f70faf0 100644
--- a/Firestore/composer.json
+++ b/Firestore/composer.json
@@ -35,9 +35,6 @@
     "autoload-dev": {
         "psr-4": {
             "Google\\Cloud\\Firestore\\Tests\\": "tests"
-        },
-        "files": [
-            "tests/Conformance/FirestoreTestGpb.php"
-        ]
+        }
     }
 }