diff --git a/__tests__/__fixtures__/mock-node-v8.8.0-linux-x86.tar.gz b/__tests__/__fixtures__/mock-node-v8.8.0-linux-x86.tar.gz
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index 000000000..fd88664a8
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diff --git a/__tests__/__fixtures__/mock-node-v8.8.0-win-x86.7z b/__tests__/__fixtures__/mock-node-v8.8.0-win-x86.7z
new file mode 100644
index 000000000..9a16b0912
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diff --git a/__tests__/__fixtures__/mock-node-v8.9.1-linux-x64.tar.gz b/__tests__/__fixtures__/mock-node-v8.9.1-linux-x64.tar.gz
new file mode 100644
index 000000000..3a4824456
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diff --git a/__tests__/__fixtures__/mock-node-v8.9.1-win-x64.7z b/__tests__/__fixtures__/mock-node-v8.9.1-win-x64.7z
new file mode 100644
index 000000000..dda8188f3
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diff --git a/__tests__/installer.test.ts b/__tests__/installer.test.ts
index 6f3a411eb..71b7b8058 100644
--- a/__tests__/installer.test.ts
+++ b/__tests__/installer.test.ts
@@ -9,6 +9,7 @@ import * as main from '../src/main';
 import * as im from '../src/installer';
 import * as auth from '../src/authutil';
 import {context} from '@actions/github';
+import nock = require('nock');
 
 let nodeTestManifest = require('./data/versions-manifest.json');
 let nodeTestDist = require('./data/node-dist-index.json');
@@ -40,7 +41,20 @@ describe('setup-node', () => {
   let execSpy: jest.SpyInstance;
   let authSpy: jest.SpyInstance;
 
+  const IS_WINDOWS = process.platform === 'win32';
+  const toolDir = path.join(
+    __dirname,
+    'runner',
+    path.join(
+      Math.random()
+        .toString(36)
+        .substring(7)
+    ),
+    'tools'
+  );
+
   beforeEach(() => {
+    nock.cleanAll();
     // @actions/core
     inputs = {};
     inSpy = jest.spyOn(core, 'getInput');
@@ -337,6 +351,64 @@ describe('setup-node', () => {
     expect(cnSpy).toHaveBeenCalledWith(`::error::${errMsg}${osm.EOL}`);
   });
 
+  it('Acquires specified x86 version of node if no matching version is installed', async () => {
+    const arch = 'x86';
+    const version = '8.8.0';
+    const fileExtension = IS_WINDOWS ? '7z' : 'tar.gz';
+    const platform = {
+      linux: 'linux',
+      darwin: 'darwin',
+      win32: 'win'
+    }[process.platform];
+    const fileName = `node-v${version}-${platform}-${arch}.${fileExtension}`;
+    const pathOnNodeJs = `/dist/v${version}/${fileName}`;
+    const scope = nock('nodejs.org')
+    .get(pathOnNodeJs)
+    .replyWithFile(
+      200,
+      path.join(__dirname, '__fixtures__', `mock-${fileName}`)
+    );
+    await im.getNode(version, true, true, arch);
+    const nodeDir = path.join(toolDir, 'node', version, arch);
+
+    expect(scope.isDone()).toBe(true);
+    expect(fs.existsSync(`${nodeDir}.complete`)).toBe(true);
+    if (IS_WINDOWS) {
+      expect(fs.existsSync(path.join(nodeDir, 'node.exe'))).toBe(true);
+    } else {
+      expect(fs.existsSync(path.join(nodeDir, 'bin', 'node'))).toBe(true);
+    }
+  }, 100000);
+
+  it('Acquires specified x64 version of node if no matching version is installed', async () => {
+    const arch = 'x64';
+    const version = '8.9.1';
+    const fileExtension = IS_WINDOWS ? '7z' : 'tar.gz';
+    const platform = {
+      linux: 'linux',
+      darwin: 'darwin',
+      win32: 'win'
+    }[process.platform];
+    const fileName = `node-v${version}-${platform}-${arch}.${fileExtension}`;
+    const pathOnNodeJs = `/dist/v${version}/${fileName}`;
+    const scope = nock('nodejs.org')
+    .get(pathOnNodeJs)
+    .replyWithFile(
+      200,
+      path.join(__dirname, '__fixtures__', `mock-${fileName}`)
+    );
+    await im.getNode(version, true, true, arch);
+    const nodeDir = path.join(toolDir, 'node', version, arch);
+
+    expect(scope.isDone()).toBe(true);
+    expect(fs.existsSync(`${nodeDir}.complete`)).toBe(true);
+    if (IS_WINDOWS) {
+      expect(fs.existsSync(path.join(nodeDir, 'node.exe'))).toBe(true);
+    } else {
+      expect(fs.existsSync(path.join(nodeDir, 'bin', 'node'))).toBe(true);
+    }
+  }, 100000);
+
   describe('check-latest flag', () => {
     it('use local version and dont check manifest if check-latest is not specified', async () => {
       os.platform = 'linux';