diff --git a/packages/bazel/test/ngc-wrapped/index_test.ts b/packages/bazel/test/ngc-wrapped/index_test.ts
index c33fe20ca0..8c094890c0 100644
--- a/packages/bazel/test/ngc-wrapped/index_test.ts
+++ b/packages/bazel/test/ngc-wrapped/index_test.ts
@@ -13,7 +13,7 @@ import {setup} from './test_support';
 describe('ngc_wrapped', () => {
 
   it('should work', () => {
-    const {read, write, runOneBuild, writeConfig, shouldExist, basePath, typesRoots} = setup();
+    const {read, write, runOneBuild, writeConfig, shouldExist, basePath} = setup();
 
     write('some_project/index.ts', `
       import {Component} from '@angular/core';
@@ -21,8 +21,11 @@ describe('ngc_wrapped', () => {
       console.log('works: ', Component);
     `);
 
+    const tsconfig = writeConfig({
+      srcTargetPath: 'some_project',
+    });
     const typesFile = path.resolve(
-        basePath, typesRoots, 'thing',
+        tsconfig.compilerOptions.rootDir, tsconfig.compilerOptions.typeRoots[0], 'thing',
         'index.d.ts');
 
     write(typesFile, `
@@ -31,11 +34,6 @@ describe('ngc_wrapped', () => {
       }
     `);
 
-    writeConfig({
-      srcTargetPath: 'some_project',
-      depPaths: [path.dirname(typesFile)],
-    });
-
     // expect no error
     expect(runOneBuild()).toBe(true);
 
diff --git a/packages/bazel/test/ngc-wrapped/test_support.ts b/packages/bazel/test/ngc-wrapped/test_support.ts
index 9f0dc054a8..2b532f594d 100644
--- a/packages/bazel/test/ngc-wrapped/test_support.ts
+++ b/packages/bazel/test/ngc-wrapped/test_support.ts
@@ -17,7 +17,6 @@ export interface TestSupport {
   basePath: string;
   runfilesPath: string;
   angularCorePath: string;
-  typesRoots: string;
   writeConfig({
       srcTargetPath, depPaths, pathMapping,
   }: {
@@ -50,22 +49,17 @@ export function setup(
   const angularCorePath = path.dirname(require.resolve('angular/packages/core'));
   const tsConfigJsonPath = path.resolve(basePath, tsconfig);
 
-  const emptyTsConfig = ts.readConfigFile(
-      require.resolve('angular/packages/bazel/test/ngc-wrapped/empty/empty_tsconfig.json'), read);
-  const typesRoots = (emptyTsConfig as any).config.compilerOptions.typeRoots[0];
-
   return {
     basePath,
     runfilesPath,
     angularCorePath,
-    typesRoots,
     write,
     read,
     writeFiles,
     writeConfig,
     shouldExist,
     shouldNotExist,
-    runOneBuild: runOneBuildImpl,
+    runOneBuild: runOneBuildImpl
   };
 
   // -----------------