diff --git a/packages/compiler-cli/test/test_support.ts b/packages/compiler-cli/test/test_support.ts
index b033097299..13a883eaf3 100644
--- a/packages/compiler-cli/test/test_support.ts
+++ b/packages/compiler-cli/test/test_support.ts
@@ -122,20 +122,21 @@ export function setupBazelTo(tmpDirPath: string) {
   fs.mkdirSync(nodeModulesPath);
   fs.mkdirSync(angularDirectory);
 
-  getAngularPackagesFromRunfiles().forEach(
-      ({pkgPath, name}) => { fs.symlinkSync(pkgPath, path.join(angularDirectory, name), 'dir'); });
+  getAngularPackagesFromRunfiles().forEach(({pkgPath, name}) => {
+    fs.symlinkSync(pkgPath, path.join(angularDirectory, name), 'junction');
+  });
 
   // Link typescript
   const typeScriptSource = resolveNpmTreeArtifact('npm/node_modules/typescript');
   const typescriptDest = path.join(nodeModulesPath, 'typescript');
-  fs.symlinkSync(typeScriptSource, typescriptDest, 'dir');
+  fs.symlinkSync(typeScriptSource, typescriptDest, 'junction');
 
   // Link "rxjs" if it has been set up as a runfile. "rxjs" is linked optionally because
   // not all compiler-cli tests need "rxjs" set up.
   try {
     const rxjsSource = resolveNpmTreeArtifact('rxjs', 'index.js');
     const rxjsDest = path.join(nodeModulesPath, 'rxjs');
-    fs.symlinkSync(rxjsSource, rxjsDest, 'dir');
+    fs.symlinkSync(rxjsSource, rxjsDest, 'junction');
   } catch (e) {
     if (e.code !== 'MODULE_NOT_FOUND') throw e;
   }
diff --git a/packages/language-service/test/reflector_host_spec.ts b/packages/language-service/test/reflector_host_spec.ts
index 0f58ce06df..8e706dc3eb 100644
--- a/packages/language-service/test/reflector_host_spec.ts
+++ b/packages/language-service/test/reflector_host_spec.ts
@@ -7,12 +7,8 @@
  */
 
 import * as path from 'path';
-import * as ts from 'typescript';
 
-import {createLanguageService} from '../src/language_service';
 import {ReflectorHost} from '../src/reflector_host';
-import {Completions, LanguageService} from '../src/types';
-import {TypeScriptServiceHost} from '../src/typescript_host';
 
 import {toh} from './test_data';
 import {MockTypescriptHost} from './test_utils';
@@ -25,12 +21,14 @@ describe('reflector_host_spec', () => {
     let mockHost = new MockTypescriptHost(
         ['/app/main.ts', '/app/parsing-cases.ts'], toh, 'app/node_modules',
         {...path, join: (...args: string[]) => originalJoin.apply(path, args)});
-    let service = ts.createLanguageService(mockHost);
-    let ngHost = new TypeScriptServiceHost(mockHost, service);
-    let ngService = createLanguageService(ngHost);
     const reflectorHost = new ReflectorHost(() => undefined as any, mockHost, {basePath: '\\app'});
 
-    spyOn(path, 'join').and.callFake((...args: string[]) => { return path.win32.join(...args); });
+    if (process.platform !== 'win32') {
+      // If we call this in Windows it will cause a 'Maximum call stack size exceeded error'
+      // Because we are spying on the same function that we are call faking
+      spyOn(path, 'join').and.callFake((...args: string[]) => { return path.win32.join(...args); });
+    }
+
     const result = reflectorHost.moduleNameToFileName('@angular/core');
     expect(result).not.toBeNull('could not find @angular/core using path.win32');
   });