diff --git a/packages/metro-bundler/src/ModuleGraph/ModuleGraph.js b/packages/metro-bundler/src/ModuleGraph/ModuleGraph.js
index b26eca8e..757fe16f 100644
--- a/packages/metro-bundler/src/ModuleGraph/ModuleGraph.js
+++ b/packages/metro-bundler/src/ModuleGraph/ModuleGraph.js
@@ -52,7 +52,7 @@ exports.createBuildSetup = (
 
     parallel({
       graph: cb => graphWithOptions(
-        concat(defaults.runBeforeMainModule, entryPoints),
+        entryPoints,
         cb,
       ),
       moduleSystem: cb => graphOnlyModules(
diff --git a/packages/metro-bundler/src/ModuleGraph/__tests__/ModuleGraph-test.js b/packages/metro-bundler/src/ModuleGraph/__tests__/ModuleGraph-test.js
index d183feeb..4a3844c9 100644
--- a/packages/metro-bundler/src/ModuleGraph/__tests__/ModuleGraph-test.js
+++ b/packages/metro-bundler/src/ModuleGraph/__tests__/ModuleGraph-test.js
@@ -70,16 +70,6 @@ describe('build setup', () => {
     });
   });
 
-  it('places all modules from `defaults.runBeforeMainModule` after the polyfills', done => {
-    buildSetup(noEntryPoints, noOptions, (error, result) => {
-      const additionalModules =
-        Array.from(result.modules).slice(-defaults.runBeforeMainModule.length);
-      expect(additionalModules)
-        .toEqual(defaults.runBeforeMainModule.map(moduleFromPath));
-      done();
-    });
-  });
-
   it('places all entry points at the end', done => {
     const entryPoints = ['a', 'b', 'c'];
     buildSetup(entryPoints, noOptions, (error, result) => {
@@ -88,15 +78,6 @@ describe('build setup', () => {
       done();
     });
   });
-
-  it('concatenates `runBeforeMainModule` and entry points as `entryModules`', done => {
-    const entryPoints = ['a', 'b', 'c'];
-    buildSetup(entryPoints, noOptions, (error, result) => {
-      expect(Array.from(result.entryModules)).toEqual(
-        defaults.runBeforeMainModule.concat(entryPoints).map(moduleFromPath));
-      done();
-    });
-  });
 });
 
 function moduleFromPath(path) {