diff --git a/__tests__/__fixtures__/mock-node-v12.18.3-linux-x64.tar.gz b/__tests__/__fixtures__/mock-node-v12.18.3-linux-x64.tar.gz
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diff --git a/__tests__/__fixtures__/mock-node-v12.18.3-linux-x86.tar.gz b/__tests__/__fixtures__/mock-node-v12.18.3-linux-x86.tar.gz
new file mode 100644
index 00000000..bedb162d
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diff --git a/__tests__/__fixtures__/mock-node-v12.18.3-win-x64.7z b/__tests__/__fixtures__/mock-node-v12.18.3-win-x64.7z
new file mode 100644
index 00000000..f5ecfd4d
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diff --git a/__tests__/__fixtures__/mock-node-v12.18.3-win-x86.7z b/__tests__/__fixtures__/mock-node-v12.18.3-win-x86.7z
new file mode 100644
index 00000000..ef5d0737
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diff --git a/__tests__/installer.test.ts b/__tests__/installer.test.ts
index b1e3cb0c..8007952a 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');
@@ -337,6 +338,52 @@ describe('setup-node', () => {
     expect(cnSpy).toHaveBeenCalledWith(`::error::${errMsg}${osm.EOL}`);
   });
 
+  it('Acquires specified x64 or x86 version of node if no matching version is installed', async () => {
+    const toolDir = path.join(
+      __dirname,
+      'runner',
+      path.join(
+        Math.random()
+          .toString(36)
+          .substring(7)
+      ),
+      'tools'
+    );
+
+    os.platform = process.platform;
+    const IS_WINDOWS = os.platform === 'win32';
+    for (const {arch, version} of [
+      {arch: 'x64', version: '12.18.3'},
+      {arch: 'x86', version: '12.18.3'}
+    ]) {
+      nock.cleanAll();
+      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-${fileName}`)
+        );
+      await im.getNode(version, true, true, undefined, arch);
+      const nodeDir = path.join(toolDir, 'node', version, arch);
+
+      expect(scope.isDone()).toBe(true);
+      expect(fs.existsSync(`${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';
diff --git a/package-lock.json b/package-lock.json
index be7fec2d..4f5279b2 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -6577,6 +6577,35 @@
       "resolved": "https://registry.npmjs.org/nice-try/-/nice-try-1.0.5.tgz",
       "integrity": "sha512-1nh45deeb5olNY7eX82BkPO7SSxR5SSYJiPTrTdFUVYwAl8CKMA5N9PjTYkHiRjisVcxcQ1HXdLhx2qxxJzLNQ=="
     },
+    "nock": {
+      "version": "13.0.4",
+      "resolved": "https://registry.npmjs.org/nock/-/nock-13.0.4.tgz",
+      "integrity": "sha512-alqTV8Qt7TUbc74x1pKRLSENzfjp4nywovcJgi/1aXDiUxXdt7TkruSTF5MDWPP7UoPVgea4F9ghVdmX0xxnSA==",
+      "dev": true,
+      "requires": {
+        "debug": "^4.1.0",
+        "json-stringify-safe": "^5.0.1",
+        "lodash.set": "^4.3.2",
+        "propagate": "^2.0.0"
+      },
+      "dependencies": {
+        "debug": {
+          "version": "4.1.1",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-4.1.1.tgz",
+          "integrity": "sha512-pYAIzeRo8J6KPEaJ0VWOh5Pzkbw/RetuzehGM7QRRX5he4fPHx2rdKMB256ehJCkX+XRQm16eZLqLNS8RSZXZw==",
+          "dev": true,
+          "requires": {
+            "ms": "^2.1.1"
+          }
+        },
+        "ms": {
+          "version": "2.1.2",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
+          "integrity": "sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w==",
+          "dev": true
+        }
+      }
+    },
     "node-fetch": {
       "version": "2.6.0",
       "resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-2.6.0.tgz",
@@ -6945,6 +6974,12 @@
         "sisteransi": "^1.0.4"
       }
     },
+    "propagate": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/propagate/-/propagate-2.0.1.tgz",
+      "integrity": "sha512-vGrhOavPSTz4QVNuBNdcNXePNdNMaO1xj9yBeH1ScQPjk/rhg9sSlCXPhMkFuaNNW/syTvYqsnbIJxMBfRbbag==",
+      "dev": true
+    },
     "psl": {
       "version": "1.8.0",
       "resolved": "https://registry.npmjs.org/psl/-/psl-1.8.0.tgz",
diff --git a/package.json b/package.json
index 9a3f1c57..c80fa0c7 100644
--- a/package.json
+++ b/package.json
@@ -38,6 +38,7 @@
     "@zeit/ncc": "^0.21.0",
     "jest": "^24.9.0",
     "jest-circus": "^24.7.1",
+    "nock": "^13.0.4",
     "prettier": "^1.19.1",
     "ts-jest": "^24.3.0",
     "typescript": "^3.8.3"