diff --git a/packages/metro-bundler/src/Server/__tests__/Server-test.js b/packages/metro-bundler/src/Server/__tests__/Server-test.js
index 178dd212..10eb8395 100644
--- a/packages/metro-bundler/src/Server/__tests__/Server-test.js
+++ b/packages/metro-bundler/src/Server/__tests__/Server-test.js
@@ -537,7 +537,7 @@ describe('processRequest', () => {
             onProgress: null,
             platform: undefined,
             resolutionResponse: null,
-            runBeforeMainModule: [],
+            runBeforeMainModule: ['InitializeCore'],
             runModule: true,
             sourceMapUrl: null,
             unbundle: false,
diff --git a/packages/metro-bundler/src/Server/index.js b/packages/metro-bundler/src/Server/index.js
index f74072da..e0c86d91 100644
--- a/packages/metro-bundler/src/Server/index.js
+++ b/packages/metro-bundler/src/Server/index.js
@@ -324,7 +324,10 @@ class Server {
   }
 
   async buildBundle(options: BundleOptions): Promise<Bundle> {
-    const bundle = await this._bundler.bundle(options);
+    const bundle = await this._bundler.bundle({
+      ...options,
+      runBeforeMainModule: this._opts.runBeforeMainModule,
+    });
     const modules = bundle.getModules();
     const nonVirtual = modules.filter(m => !m.virtual);
     bundleDeps.set(bundle, {