diff --git a/document-ai/batch_parse_form.js b/document-ai/batch_parse_form.js
index 242c1c9742..4812d4a926 100644
--- a/document-ai/batch_parse_form.js
+++ b/document-ai/batch_parse_form.js
@@ -19,6 +19,7 @@ const uuid = require('uuid');
 
 async function main(
   projectId = 'YOUR_PROJECT_ID',
+  location = 'YOUR_PROJECT_LOCATION',
   gcsOutputUri = 'output-bucket',
   gcsOutputUriPrefix = uuid.v4(),
   gcsInputUri = 'gs://cloud-samples-data/documentai/invoice.pdf'
@@ -28,6 +29,7 @@ async function main(
    * TODO(developer): Uncomment these variables before running the sample.
    */
   // const projectId = 'YOUR_PROJECT_ID';
+  // const location = 'YOUR_PROJECT_LOCATION'; // Format is 'us' or 'eu'
   // const gcsOutputUri = 'YOUR_STORAGE_BUCKET';
   // const gcsOutputUriPrefix = 'YOUR_STORAGE_PREFIX';
   // const gcsInputUri = 'GCS URI of the PDF to process';
@@ -42,7 +44,7 @@ async function main(
   const storage = new Storage();
 
   async function parseFormGCS(inputUri, outputUri, outputUriPrefix) {
-    const parent = `projects/${projectId}`;
+    const parent = `projects/${projectId}/locations/${location}`;
 
     // Configure the batch process request.
     const request = {
diff --git a/document-ai/batch_parse_table.js b/document-ai/batch_parse_table.js
index 028cc1343f..98136962f3 100644
--- a/document-ai/batch_parse_table.js
+++ b/document-ai/batch_parse_table.js
@@ -19,6 +19,7 @@ const uuid = require('uuid');
 
 async function main(
   projectId = 'YOUR_PROJECT_ID',
+  location = 'YOUR_PROJECT_LOCATION',
   gcsOutputUri = 'output-bucket',
   gcsOutputUriPrefix = uuid.v4(),
   gcsInputUri = 'gs://cloud-samples-data/documentai/invoice.pdf'
@@ -28,6 +29,7 @@ async function main(
    * TODO(developer): Uncomment these variables before running the sample.
    */
   // const projectId = 'YOUR_PROJECT_ID';
+  // const location = 'YOUR_PROJECT_LOCATION'; // Format is 'us' or 'eu'
   // const gcsOutputUri = 'YOUR_STORAGE_BUCKET';
   // const gcsOutputUriPrefix = 'YOUR_STORAGE_PREFIX';
   // const gcsInputUri = 'YOUR_SOURCE_PDF';
@@ -42,7 +44,7 @@ async function main(
   const storage = new Storage();
 
   async function parseTableGCS(inputUri, outputUri, outputUriPrefix) {
-    const parent = `projects/${projectId}`;
+    const parent = `projects/${projectId}/locations/${location}`;
 
     // Configure the batch process request.
     const request = {
diff --git a/document-ai/parse_form.js b/document-ai/parse_form.js
index edac82f810..72e27d3c44 100644
--- a/document-ai/parse_form.js
+++ b/document-ai/parse_form.js
@@ -15,13 +15,9 @@
 
 'use strict';
 
-/**
- * Process a single PDF as a form.
- * @param {string} projectId your Google Cloud project ID
- * @param {string} gcsInputUri Cloud Storage URI of the PDF document to parse
- */
 async function main(
   projectId,
+  location,
   gcsInputUri = 'gs://cloud-samples-data/documentai/invoice.pdf'
 ) {
   // [START documentai_parse_form]
@@ -29,6 +25,7 @@ async function main(
    * TODO(developer): Uncomment these variables before running the sample.
    */
   // const projectId = 'YOUR_PROJECT_ID';
+  // const location = 'YOUR_PROJECT_LOCATION'; // Format is 'us' or 'eu'
   // const gcsInputUri = 'YOUR_SOURCE_PDF';
 
   const {
@@ -38,7 +35,7 @@ async function main(
 
   async function parseForm() {
     // Configure the request for processing the PDF
-    const parent = `projects/${projectId}`;
+    const parent = `projects/${projectId}/locations/${location}`;
     const request = {
       parent,
       inputConfig: {
diff --git a/document-ai/parse_table.js b/document-ai/parse_table.js
index b8059357a4..d368ca869c 100644
--- a/document-ai/parse_table.js
+++ b/document-ai/parse_table.js
@@ -15,13 +15,9 @@
 
 'use strict';
 
-/**
- * Process a single PDF.
- * @param {string} projectId your Google Cloud project ID
- * @param {string} gcsInputUri Cloud Storage URI of the PDF document to parse
- */
 async function main(
   projectId,
+  location,
   gcsInputUri = 'gs://cloud-samples-data/documentai/invoice.pdf'
 ) {
   // [START documentai_parse_table]
@@ -29,6 +25,7 @@ async function main(
    * TODO(developer): Uncomment these variables before running the sample.
    */
   // const projectId = 'YOUR_PROJECT_ID';
+  // const location = 'YOUR_PROJECT_LOCATION'; // Format is 'us' or 'eu'
   // const gcsInputUri = 'YOUR_SOURCE_PDF';
 
   const {
@@ -38,7 +35,7 @@ async function main(
 
   async function parseTable() {
     // Configure the request for processing the PDF
-    const parent = `projects/${projectId}`;
+    const parent = `projects/${projectId}/locations/${location}`;
     const request = {
       parent,
       inputConfig: {
diff --git a/document-ai/parse_with_model.js b/document-ai/parse_with_model.js
index 08c99a5252..3285756159 100644
--- a/document-ai/parse_with_model.js
+++ b/document-ai/parse_with_model.js
@@ -15,14 +15,9 @@
 
 'use strict';
 
-/**
- * Process a single PDF.
- * @param {string} projectId your Google Cloud project ID
- * @param {string} autoMLModel AutoML Natural Language model to use
- * @param {string} gcsInputUri Cloud Storage URI of the PDF document to parse
- */
 async function main(
   projectId,
+  location,
   autoMLModel,
   gcsInputUri = 'gs://cloud-samples-data/documentai/invoice.pdf'
 ) {
@@ -31,6 +26,7 @@ async function main(
    * TODO(developer): Uncomment these variables before running the sample.
    */
   // const projectId = 'YOUR_PROJECT_ID';
+  // const location = 'YOUR_PROJECT_LOCATION'; // Format is 'us' or 'eu'
   // const autoMLModel = 'Full resource name of AutoML Natural Language model';
   // const gcsInputUri = 'YOUR_SOURCE_PDF';
 
@@ -41,7 +37,7 @@ async function main(
 
   async function parseWithModel() {
     // Configure the request for processing the PDF
-    const parent = `projects/${projectId}`;
+    const parent = `projects/${projectId}/locations/${location}`;
     const request = {
       parent,
       inputConfig: {
diff --git a/document-ai/quickstart.js b/document-ai/quickstart.js
index 9741973141..4ac5bf6699 100644
--- a/document-ai/quickstart.js
+++ b/document-ai/quickstart.js
@@ -15,13 +15,9 @@
 
 'use strict';
 
-/**
- * Process a single PDF.
- * @param {string} projectId your Google Cloud project ID
- * @param {string} gcsInputUri Cloud Storage URI of the PDF document to parse
- */
 async function main(
   projectId,
+  location,
   gcsInputUri = 'gs://cloud-samples-data/documentai/invoice.pdf'
 ) {
   // [START documentai_quickstart]
@@ -29,6 +25,7 @@ async function main(
    * TODO(developer): Uncomment these variables before running the sample.
    */
   // const projectId = 'YOUR_PROJECT_ID';
+  // const location = 'YOUR_PROJECT_LOCATION'; // Format is 'us' or 'eu'
   // const gcsInputUri = 'YOUR_SOURCE_PDF';
 
   const {
@@ -38,7 +35,7 @@ async function main(
 
   async function quickstart() {
     // Configure the request for processing the PDF
-    const parent = `projects/${projectId}`;
+    const parent = `projects/${projectId}/locations/${location}`;
     const request = {
       parent,
       inputConfig: {
diff --git a/document-ai/set_endpoint.js b/document-ai/set_endpoint.js
index d47f64e76d..fef1ff80d9 100644
--- a/document-ai/set_endpoint.js
+++ b/document-ai/set_endpoint.js
@@ -15,13 +15,9 @@
 
 'use strict';
 
-/**
- * Process a single PDF.
- * @param {string} projectId your Google Cloud project ID
- * @param {string} gcsInputUri Cloud Storage URI of the PDF document to parse
- */
 async function main(
   projectId,
+  location = 'eu',
   gcsInputUri = 'gs://cloud-samples-data/documentai/invoice.pdf'
 ) {
   // [START documentai_set_endpoint]
@@ -29,6 +25,7 @@ async function main(
    * TODO(developer): Uncomment these variables before running the sample.
    */
   // const projectId = 'YOUR_PROJECT_ID';
+  // const location = 'YOUR_PROJECT_LOCATION'; // Format is 'us' or 'eu'
   // const gcsInputUri = 'YOUR_SOURCE_PDF';
 
   const {
@@ -41,7 +38,7 @@ async function main(
 
   async function setEndpoint() {
     // Configure the request for processing the PDF
-    const parent = `projects/${projectId}`;
+    const parent = `projects/${projectId}/locations/${location}`;
     const request = {
       parent,
       inputConfig: {
diff --git a/document-ai/test/batch_parse_form.test.js b/document-ai/test/batch_parse_form.test.js
index 55bf7a088f..9c8b57e973 100644
--- a/document-ai/test/batch_parse_form.test.js
+++ b/document-ai/test/batch_parse_form.test.js
@@ -28,6 +28,7 @@ const cmd = 'node batch_parse_form.js';
 
 const testParseForm = {
   projectId: process.env.GCLOUD_PROJECT,
+  location: 'us',
   gcsOutputUriPrefix: uuid.v4(),
 };
 
@@ -44,7 +45,7 @@ describe('Document AI batch parse form', () => {
 
   it('should parse the GCS invoice example as a form', async () => {
     const output = execSync(
-      `${cmd} ${testParseForm.projectId} gs://${bucketName}`
+      `${cmd} ${testParseForm.projectId} ${testParseForm.location} gs://${bucketName}`
     );
     assert.match(output, /Extracted key value pair:/);
   });
diff --git a/document-ai/test/batch_parse_table.test.js b/document-ai/test/batch_parse_table.test.js
index 65b78ba1b3..6844b13557 100644
--- a/document-ai/test/batch_parse_table.test.js
+++ b/document-ai/test/batch_parse_table.test.js
@@ -28,6 +28,7 @@ const cmd = 'node batch_parse_table.js';
 
 const testParseTable = {
   projectId: process.env.GCLOUD_PROJECT,
+  location: 'us',
   gcsOutputUriPrefix: uuid.v4(),
 };
 
@@ -44,7 +45,7 @@ describe('Document AI batch parse table', () => {
 
   it('should parse the GCS invoice example as as table', async () => {
     const output = execSync(
-      `${cmd} ${testParseTable.projectId} gs://${bucketName}`
+      `${cmd} ${testParseTable.projectId} ${testParseTable.location} gs://${bucketName}`
     );
     assert.match(output, /First detected language:/);
   });
diff --git a/document-ai/test/parse_form.test.js b/document-ai/test/parse_form.test.js
index 4108a23f2c..8052ceb632 100644
--- a/document-ai/test/parse_form.test.js
+++ b/document-ai/test/parse_form.test.js
@@ -23,10 +23,11 @@ const execSync = cmd => cp.execSync(cmd, {encoding: 'utf-8'});
 
 const cwd = path.join(__dirname, '..');
 const projectId = process.env.GCLOUD_PROJECT;
+const LOCATION = 'us';
 
 describe('Document AI parse form', () => {
   it('should parse the GCS invoice example as a form', async () => {
-    const stdout = execSync(`node ./parse_form.js ${projectId}`, {
+    const stdout = execSync(`node ./parse_form.js ${projectId} ${LOCATION}`, {
       cwd,
     });
     assert.match(stdout, /Extracted key value pair:/);
diff --git a/document-ai/test/parse_table.test.js b/document-ai/test/parse_table.test.js
index fcace94dee..060e825f4d 100644
--- a/document-ai/test/parse_table.test.js
+++ b/document-ai/test/parse_table.test.js
@@ -23,10 +23,11 @@ const execSync = cmd => cp.execSync(cmd, {encoding: 'utf-8'});
 
 const cwd = path.join(__dirname, '..');
 const projectId = process.env.GCLOUD_PROJECT;
+const LOCATION = 'us';
 
 describe('Document AI parse table', () => {
   it('should parse the GCS invoice example as as table', async () => {
-    const stdout = execSync(`node ./parse_table.js ${projectId}`, {
+    const stdout = execSync(`node ./parse_table.js ${projectId} ${LOCATION}`, {
       cwd,
     });
     assert.match(stdout, /Header row/);
diff --git a/document-ai/test/parse_with_model.test.js b/document-ai/test/parse_with_model.test.js
index b976bda61a..a2f0afed65 100644
--- a/document-ai/test/parse_with_model.test.js
+++ b/document-ai/test/parse_with_model.test.js
@@ -23,6 +23,7 @@ const execSync = cmd => cp.execSync(cmd, {encoding: 'utf-8'});
 
 const cwd = path.join(__dirname, '..');
 const projectId = process.env.GCLOUD_PROJECT;
+const LOCATION = 'us';
 const MODEL_NAME =
   process.env.MODEL_NAME ||
   'projects/1046198160504/locations/us-central1/models/TCN7483069430457434112';
@@ -30,7 +31,7 @@ const MODEL_NAME =
 describe('Document AI parse with AutoML model', () => {
   it('should run use an AutoML model to parse a PDF', async () => {
     const stdout = execSync(
-      `node ./parse_with_model.js ${projectId} ${MODEL_NAME}`,
+      `node ./parse_with_model.js ${projectId} ${LOCATION} ${MODEL_NAME}`,
       {
         cwd,
       }
diff --git a/document-ai/test/quickstart.test.js b/document-ai/test/quickstart.test.js
index 63c2285ba6..8a44c2d6c8 100644
--- a/document-ai/test/quickstart.test.js
+++ b/document-ai/test/quickstart.test.js
@@ -23,10 +23,11 @@ const execSync = cmd => cp.execSync(cmd, {encoding: 'utf-8'});
 
 const cwd = path.join(__dirname, '..');
 const projectId = process.env.GCLOUD_PROJECT;
+const LOCATION = 'us';
 
 describe('Quickstart', () => {
   it('should run quickstart', async () => {
-    const stdout = execSync(`node ./quickstart.js ${projectId}`, {
+    const stdout = execSync(`node ./quickstart.js ${projectId} ${LOCATION}`, {
       cwd,
     });
     assert.match(stdout, /Entity/);
diff --git a/document-ai/test/set_endpoint.test.js b/document-ai/test/set_endpoint.test.js
index 92c96a11c5..f8b52acdcd 100644
--- a/document-ai/test/set_endpoint.test.js
+++ b/document-ai/test/set_endpoint.test.js
@@ -23,10 +23,11 @@ const execSync = cmd => cp.execSync(cmd, {encoding: 'utf-8'});
 
 const cwd = path.join(__dirname, '..');
 const projectId = process.env.GCLOUD_PROJECT;
+const LOCATION = 'eu';
 
 describe('Document AI set endpoint', () => {
   it('should process a PDF in another region', async () => {
-    const stdout = execSync(`node ./set_endpoint.js ${projectId}`, {
+    const stdout = execSync(`node ./set_endpoint.js ${projectId} ${LOCATION}`, {
       cwd,
     });
     assert.match(stdout, /Entity/);