diff --git a/WORKSPACE b/WORKSPACE
index 2abf5f6cc8..1beda0c030 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -16,7 +16,7 @@ node_repositories(package_json = ["//:package.json"])
 git_repository(
     name = "build_bazel_rules_typescript",
     remote = "https://github.com/bazelbuild/rules_typescript.git",
-    commit = "eb3244363e1cb265c84e723b347926f28c29aa35"
+    commit = "d3ad16d1f105e2490859da9ad528ba4c45991d09"
 )
 
 load("@build_bazel_rules_typescript//:defs.bzl", "ts_setup_workspace")
diff --git a/integration/bazel/WORKSPACE b/integration/bazel/WORKSPACE
index f063fe7d64..a5983fedb5 100644
--- a/integration/bazel/WORKSPACE
+++ b/integration/bazel/WORKSPACE
@@ -14,7 +14,7 @@ node_repositories(package_json = ["//:package.json"])
 git_repository(
     name = "build_bazel_rules_typescript",
     remote = "https://github.com/bazelbuild/rules_typescript.git",
-    commit = "eb3244363e1cb265c84e723b347926f28c29aa35"
+    commit = "d3ad16d1f105e2490859da9ad528ba4c45991d09"
 )
 
 load("@build_bazel_rules_typescript//:defs.bzl", "ts_setup_workspace")
diff --git a/packages/bazel/test/ngc-wrapped/index_test.ts b/packages/bazel/test/ngc-wrapped/index_test.ts
index b7cce77b1d..49a85d99a6 100644
--- a/packages/bazel/test/ngc-wrapped/index_test.ts
+++ b/packages/bazel/test/ngc-wrapped/index_test.ts
@@ -18,12 +18,22 @@ describe('ngc_wrapped', () => {
 
     write('some_project/index.ts', `
       import {Component} from '@angular/core';
+      import {a} from 'ambient_module';
       console.log('works: ', Component);
     `);
 
-    writeConfig({
+    const tsconfig = writeConfig({
       srcTargetPath: 'some_project',
     });
+    const typesFile = path.resolve(
+        tsconfig.compilerOptions.rootDir, tsconfig.compilerOptions.typeRoots[0], 'thing',
+        'index.d.ts');
+
+    write(typesFile, `
+      declare module "ambient_module" {
+        declare const a = 1;
+      }
+    `);
 
     // 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 9246d57efb..eec4cb8ee0 100644
--- a/packages/bazel/test/ngc-wrapped/test_support.ts
+++ b/packages/bazel/test/ngc-wrapped/test_support.ts
@@ -24,7 +24,7 @@ export interface TestSupport {
     srcTargetPath: string,
     depPaths?: string[],
     pathMapping?: Array<{moduleName: string; path: string;}>,
-  }): void;
+  }): {compilerOptions: ts.CompilerOptions};
   read(fileName: string): string;
   write(fileName: string, content: string): void;
   writeFiles(...mockDirs: {[fileName: string]: string}[]): void;
@@ -68,11 +68,19 @@ export function setup(
   // -----------------
   // helpers
 
+  function mkdirp(dirname: string) {
+    const parent = path.dirname(dirname);
+    if (!fs.existsSync(parent)) {
+      mkdirp(parent);
+    }
+    fs.mkdirSync(dirname);
+  }
+
   function write(fileName: string, content: string) {
     const dir = path.dirname(fileName);
     if (dir != '.') {
       const newDir = path.resolve(basePath, dir);
-      if (!fs.existsSync(newDir)) fs.mkdirSync(newDir);
+      if (!fs.existsSync(newDir)) mkdirp(newDir);
     }
     fs.writeFileSync(path.resolve(basePath, fileName), content, {encoding: 'utf-8'});
   }
@@ -126,6 +134,7 @@ export function setup(
       pathMapping: pathMappingObj,
     });
     write(path.resolve(basePath, tsConfigJsonPath), JSON.stringify(tsconfig, null, 2));
+    return tsconfig;
   }
 
   function shouldExist(fileName: string) {