diff --git a/.github/workflows/e2e-matrix.yml b/.github/workflows/e2e-matrix.yml
index ddf952207ba99..925a2758c18da 100644
--- a/.github/workflows/e2e-matrix.yml
+++ b/.github/workflows/e2e-matrix.yml
@@ -46,6 +46,7 @@ jobs:
           - e2e-storybook
           - e2e-workspace-integrations,e2e-workspace-core,e2e-workspace-create
           - e2e-react-native,e2e-detox
+          - e2e-add-nx-to-monorepo
         exclude:
           # exclude react-native and detox from ubuntu
           - os: ubuntu-latest
diff --git a/e2e/add-nx-to-monorepo/jest.config.js b/e2e/add-nx-to-monorepo/jest.config.js
new file mode 100644
index 0000000000000..e2d940f526fff
--- /dev/null
+++ b/e2e/add-nx-to-monorepo/jest.config.js
@@ -0,0 +1,10 @@
+module.exports = {
+  preset: '../../jest.preset.js',
+  transform: {
+    '^.+\\.[tj]sx?$': 'ts-jest',
+  },
+  moduleFileExtensions: ['ts', 'tsx', 'js', 'jsx', 'html'],
+  maxWorkers: 1,
+  globals: { 'ts-jest': { tsconfig: '<rootDir>/tsconfig.spec.json' } },
+  displayName: 'e2e-add-nx-to-monorepo',
+};
diff --git a/e2e/add-nx-to-monorepo/project.json b/e2e/add-nx-to-monorepo/project.json
new file mode 100644
index 0000000000000..af47be398efa5
--- /dev/null
+++ b/e2e/add-nx-to-monorepo/project.json
@@ -0,0 +1,34 @@
+{
+  "root": "e2e/add-nx-to-monorepo",
+  "sourceRoot": "e2e/add-nx-to-monorepo",
+  "projectType": "application",
+  "targets": {
+    "e2e": {
+      "executor": "@nrwl/workspace:run-commands",
+      "options": {
+        "commands": [
+          {
+            "command": "yarn e2e-start-local-registry"
+          },
+          {
+            "command": "yarn e2e-build-package-publish"
+          },
+          {
+            "command": "nx run-e2e-tests e2e-add-nx-to-monorepo"
+          }
+        ],
+        "parallel": false
+      }
+    },
+    "run-e2e-tests": {
+      "executor": "@nrwl/jest:jest",
+      "options": {
+        "jestConfig": "e2e/add-nx-to-monorepo/jest.config.js",
+        "passWithNoTests": true,
+        "runInBand": true
+      },
+      "outputs": ["coverage/e2e/add-nx-to-monorepo"]
+    }
+  },
+  "implicitDependencies": ["workspace"]
+}
diff --git a/e2e/add-nx-to-monorepo/src/add-nx-to-monorepo.test.ts b/e2e/add-nx-to-monorepo/src/add-nx-to-monorepo.test.ts
new file mode 100644
index 0000000000000..fb1009af06519
--- /dev/null
+++ b/e2e/add-nx-to-monorepo/src/add-nx-to-monorepo.test.ts
@@ -0,0 +1,37 @@
+import {
+  createNonNxProjectDirectory,
+  readProjectConfig,
+  runCommand,
+  tmpProjPath,
+  updateFile,
+} from '@nrwl/e2e/utils';
+import { Workspaces } from '@nrwl/tao/src/shared/workspace';
+
+describe('add-nx-to-monorepo', () => {
+  it('should not throw', () => {
+    // Arrange
+    createNonNxProjectDirectory();
+    updateFile(
+      'packages/package-a/package.json',
+      JSON.stringify({
+        name: 'package-a',
+      })
+    );
+    updateFile(
+      'packages/package-b/package.json',
+      JSON.stringify({
+        name: 'package-b',
+      })
+    );
+
+    // Act
+    const output = runCommand('npx add-nx-to-monorepo');
+    // Assert
+    expect(output).toBeTruthy();
+    expect(readWorkspaceConfig().projects['package-a']).toBeTruthy();
+    expect(readWorkspaceConfig().projects['package-b']).toBeTruthy();
+  });
+});
+
+const readWorkspaceConfig = () =>
+  new Workspaces(tmpProjPath()).readWorkspaceConfiguration();
diff --git a/e2e/add-nx-to-monorepo/tsconfig.json b/e2e/add-nx-to-monorepo/tsconfig.json
new file mode 100644
index 0000000000000..6d5abf8483200
--- /dev/null
+++ b/e2e/add-nx-to-monorepo/tsconfig.json
@@ -0,0 +1,13 @@
+{
+  "extends": "../../tsconfig.base.json",
+  "compilerOptions": {
+    "types": ["node", "jest"]
+  },
+  "include": [],
+  "files": [],
+  "references": [
+    {
+      "path": "./tsconfig.spec.json"
+    }
+  ]
+}
diff --git a/e2e/add-nx-to-monorepo/tsconfig.spec.json b/e2e/add-nx-to-monorepo/tsconfig.spec.json
new file mode 100644
index 0000000000000..1ad559c708973
--- /dev/null
+++ b/e2e/add-nx-to-monorepo/tsconfig.spec.json
@@ -0,0 +1,19 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "outDir": "../../dist/out-tsc",
+    "module": "commonjs",
+    "types": ["jest", "node"]
+  },
+  "include": [
+    "**/*.test.ts",
+    "**/*.spec.ts",
+    "**/*.spec.tsx",
+    "**/*.test.tsx",
+    "**/*.spec.js",
+    "**/*.test.js",
+    "**/*.spec.jsx",
+    "**/*.test.jsx",
+    "**/*.d.ts"
+  ]
+}
diff --git a/e2e/utils/index.ts b/e2e/utils/index.ts
index b45d92edab41c..952e697b0c070 100644
--- a/e2e/utils/index.ts
+++ b/e2e/utils/index.ts
@@ -91,6 +91,17 @@ export function readProjectConfig(projectName: string): ProjectConfiguration {
   return readJson(path);
 }
 
+export function createNonNxProjectDirectory(name = uniq('proj')) {
+  projName = name;
+  ensureDirSync(tmpProjPath());
+  createFile(
+    'package.json',
+    JSON.stringify({
+      name,
+    })
+  );
+}
+
 export function runCreateWorkspace(
   name: string,
   {
diff --git a/workspace.json b/workspace.json
index 858842c6cbb0c..8ddeed969efb3 100644
--- a/workspace.json
+++ b/workspace.json
@@ -11,6 +11,7 @@
     "detox": "packages/detox",
     "devkit": "packages/devkit",
     "docs": "docs",
+    "e2e-add-nx-to-monorepo": "e2e/add-nx-to-monorepo",
     "e2e-angular-core": "e2e/angular-core",
     "e2e-angular-extensions": "e2e/angular-extensions",
     "e2e-cli": "e2e/cli",