diff --git a/react-packager/src/Bundler/__tests__/Bundle-test.js b/react-packager/src/Bundler/__tests__/Bundle-test.js
index a043c164..9aef2b35 100644
--- a/react-packager/src/Bundler/__tests__/Bundle-test.js
+++ b/react-packager/src/Bundler/__tests__/Bundle-test.js
@@ -212,7 +212,7 @@ describe('Bundle', () => {
       }).then(() => {
         otherBundle.setMainModuleId('foo');
         otherBundle.finalize({
-          runBeforeMainModule: ['InitializeJavaScriptAppEngine'],
+          runBeforeMainModule: ['InitializeCore'],
           runMainModule: true,
         });
 
@@ -243,11 +243,11 @@ describe('Bundle', () => {
                 line: 6
               },
               map: {
-                file: 'require-InitializeJavaScriptAppEngine.js',
+                file: 'require-InitializeCore.js',
                 mappings: 'AAAA;',
                 names: [],
-                sources: [ 'require-InitializeJavaScriptAppEngine.js' ],
-                sourcesContent: [';require("InitializeJavaScriptAppEngine");'],
+                sources: [ 'require-InitializeCore.js' ],
+                sourcesContent: [';require("InitializeCore");'],
                 version: 3,
               }
             },
diff --git a/react-packager/src/Server/__tests__/Server-test.js b/react-packager/src/Server/__tests__/Server-test.js
index 4cb07397..2a404116 100644
--- a/react-packager/src/Server/__tests__/Server-test.js
+++ b/react-packager/src/Server/__tests__/Server-test.js
@@ -160,7 +160,7 @@ describe('processRequest', () => {
         dev: true,
         platform: undefined,
         onProgress: jasmine.any(Function),
-        runBeforeMainModule: ['InitializeJavaScriptAppEngine'],
+        runBeforeMainModule: ['InitializeCore'],
         unbundle: false,
         entryModuleOnly: false,
         isolateModuleIDs: false,
@@ -185,7 +185,7 @@ describe('processRequest', () => {
         dev: true,
         platform: 'ios',
         onProgress: jasmine.any(Function),
-        runBeforeMainModule: ['InitializeJavaScriptAppEngine'],
+        runBeforeMainModule: ['InitializeCore'],
         unbundle: false,
         entryModuleOnly: false,
         isolateModuleIDs: false,
@@ -210,7 +210,7 @@ describe('processRequest', () => {
         dev: true,
         platform: undefined,
         onProgress: jasmine.any(Function),
-        runBeforeMainModule: ['InitializeJavaScriptAppEngine'],
+        runBeforeMainModule: ['InitializeCore'],
         unbundle: false,
         entryModuleOnly: false,
         isolateModuleIDs: false,
@@ -440,7 +440,7 @@ describe('processRequest', () => {
           runModule: true,
           dev: true,
           platform: undefined,
-          runBeforeMainModule: ['InitializeJavaScriptAppEngine'],
+          runBeforeMainModule: ['InitializeCore'],
           unbundle: false,
           entryModuleOnly: false,
           isolateModuleIDs: false,
@@ -463,7 +463,7 @@ describe('processRequest', () => {
             sourceMapUrl: '/path/to/foo.map?dev=false&runModule=false',
             dev: false,
             platform: undefined,
-            runBeforeMainModule: ['InitializeJavaScriptAppEngine'],
+            runBeforeMainModule: ['InitializeCore'],
             unbundle: false,
             entryModuleOnly: false,
             isolateModuleIDs: false,
diff --git a/react-packager/src/Server/index.js b/react-packager/src/Server/index.js
index 1b679e81..a9153d27 100644
--- a/react-packager/src/Server/index.js
+++ b/react-packager/src/Server/index.js
@@ -130,7 +130,7 @@ const bundleOpts = declareOpts({
     type: 'array',
     default: [
       // Ensures essential globals are available and are patched correctly.
-      'InitializeJavaScriptAppEngine'
+      'InitializeCore'
     ],
   },
   unbundle: {