diff --git a/packages/plugin/tests/mocks/graphql-server.ts b/packages/plugin/tests/mocks/graphql-server.ts
index 9e7c0a27419..a1483adbfdc 100644
--- a/packages/plugin/tests/mocks/graphql-server.ts
+++ b/packages/plugin/tests/mocks/graphql-server.ts
@@ -40,7 +40,9 @@ class TestGraphQLServer {
     if (pathname === '/') {
       const { query } = await this.parseData(req);
       if (query.includes('query IntrospectionQuery')) {
-        res.end(JSON.stringify(introspectionQueryResult));
+        res.end(JSON.stringify({
+          data: introspectionQueryResult
+        }));
       }
     } else if (pathname === '/my-headers') {
       res.end(JSON.stringify(req.headers));