diff --git a/document-ai/batch_parse_form.js b/document-ai/batch_parse_form.js
index 6acbf69bb3..242c1c9742 100644
--- a/document-ai/batch_parse_form.js
+++ b/document-ai/batch_parse_form.js
@@ -19,7 +19,6 @@ 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'
@@ -29,7 +28,6 @@ async function main(
    * TODO(developer): Uncomment these variables before running the sample.
    */
   // const projectId = 'YOUR_PROJECT_ID';
-  // const location = 'YOUR_PROJECT_LOCATION',
   // const gcsOutputUri = 'YOUR_STORAGE_BUCKET';
   // const gcsOutputUriPrefix = 'YOUR_STORAGE_PREFIX';
   // const gcsInputUri = 'GCS URI of the PDF to process';
@@ -44,7 +42,7 @@ async function main(
   const storage = new Storage();
 
   async function parseFormGCS(inputUri, outputUri, outputUriPrefix) {
-    const parent = `projects/${projectId}/locations/${location}`;
+    const parent = `projects/${projectId}`;
 
     // Configure the batch process request.
     const request = {
diff --git a/document-ai/batch_parse_table.js b/document-ai/batch_parse_table.js
index 68357be509..028cc1343f 100644
--- a/document-ai/batch_parse_table.js
+++ b/document-ai/batch_parse_table.js
@@ -19,7 +19,6 @@ 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'
@@ -29,7 +28,6 @@ async function main(
    * TODO(developer): Uncomment these variables before running the sample.
    */
   // const projectId = 'YOUR_PROJECT_ID';
-  // const location = 'YOUR_PROJECT_LOCATION';
   // const gcsOutputUri = 'YOUR_STORAGE_BUCKET';
   // const gcsOutputUriPrefix = 'YOUR_STORAGE_PREFIX';
   // const gcsInputUri = 'YOUR_SOURCE_PDF';
@@ -44,7 +42,7 @@ async function main(
   const storage = new Storage();
 
   async function parseTableGCS(inputUri, outputUri, outputUriPrefix) {
-    const parent = `projects/${projectId}/locations/${location}`;
+    const parent = `projects/${projectId}`;
 
     // Configure the batch process request.
     const request = {
diff --git a/document-ai/parse_form.js b/document-ai/parse_form.js
index 9cb943d126..edac82f810 100644
--- a/document-ai/parse_form.js
+++ b/document-ai/parse_form.js
@@ -18,12 +18,10 @@
 /**
  * Process a single PDF as a form.
  * @param {string} projectId your Google Cloud project ID
- * @param {string} location region to use for this operation
  * @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]
@@ -31,7 +29,6 @@ async function main(
    * TODO(developer): Uncomment these variables before running the sample.
    */
   // const projectId = 'YOUR_PROJECT_ID';
-  // const location = 'YOUR_PROJECT_LOCATION';
   // const gcsInputUri = 'YOUR_SOURCE_PDF';
 
   const {
@@ -41,7 +38,7 @@ async function main(
 
   async function parseForm() {
     // Configure the request for processing the PDF
-    const parent = `projects/${projectId}/locations/${location}`;
+    const parent = `projects/${projectId}`;
     const request = {
       parent,
       inputConfig: {
diff --git a/document-ai/parse_table.js b/document-ai/parse_table.js
index eb1ab4f460..b8059357a4 100644
--- a/document-ai/parse_table.js
+++ b/document-ai/parse_table.js
@@ -18,12 +18,10 @@
 /**
  * Process a single PDF.
  * @param {string} projectId your Google Cloud project ID
- * @param {string} location region to use for this operation
  * @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]
@@ -31,7 +29,6 @@ async function main(
    * TODO(developer): Uncomment these variables before running the sample.
    */
   // const projectId = 'YOUR_PROJECT_ID';
-  // const location = 'YOUR_PROJECT_LOCATION';
   // const gcsInputUri = 'YOUR_SOURCE_PDF';
 
   const {
@@ -41,7 +38,7 @@ async function main(
 
   async function parseTable() {
     // Configure the request for processing the PDF
-    const parent = `projects/${projectId}/locations/${location}`;
+    const parent = `projects/${projectId}`;
     const request = {
       parent,
       inputConfig: {
diff --git a/document-ai/parse_with_model.js b/document-ai/parse_with_model.js
index 50d01b8ef8..08c99a5252 100644
--- a/document-ai/parse_with_model.js
+++ b/document-ai/parse_with_model.js
@@ -18,13 +18,11 @@
 /**
  * Process a single PDF.
  * @param {string} projectId your Google Cloud project ID
- * @param {string} location region to use for this operation
  * @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'
 ) {
@@ -33,7 +31,6 @@ async function main(
    * TODO(developer): Uncomment these variables before running the sample.
    */
   // const projectId = 'YOUR_PROJECT_ID';
-  // const location = 'YOUR_PROJECT_LOCATION';
   // const autoMLModel = 'Full resource name of AutoML Natural Language model';
   // const gcsInputUri = 'YOUR_SOURCE_PDF';
 
@@ -44,7 +41,7 @@ async function main(
 
   async function parseWithModel() {
     // Configure the request for processing the PDF
-    const parent = `projects/${projectId}/locations/${location}`;
+    const parent = `projects/${projectId}`;
     const request = {
       parent,
       inputConfig: {
diff --git a/document-ai/quickstart.js b/document-ai/quickstart.js
index 25e391f7e2..9741973141 100644
--- a/document-ai/quickstart.js
+++ b/document-ai/quickstart.js
@@ -18,12 +18,10 @@
 /**
  * Process a single PDF.
  * @param {string} projectId your Google Cloud project ID
- * @param {string} location region to use for this operation
  * @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]
@@ -31,7 +29,6 @@ async function main(
    * TODO(developer): Uncomment these variables before running the sample.
    */
   // const projectId = 'YOUR_PROJECT_ID';
-  // const location = 'YOUR_PROJECT_LOCATION';
   // const gcsInputUri = 'YOUR_SOURCE_PDF';
 
   const {
@@ -41,7 +38,7 @@ async function main(
 
   async function quickstart() {
     // Configure the request for processing the PDF
-    const parent = `projects/${projectId}/locations/${location}`;
+    const parent = `projects/${projectId}`;
     const request = {
       parent,
       inputConfig: {
diff --git a/document-ai/set_endpoint.js b/document-ai/set_endpoint.js
index b96de2796b..d47f64e76d 100644
--- a/document-ai/set_endpoint.js
+++ b/document-ai/set_endpoint.js
@@ -18,12 +18,10 @@
 /**
  * Process a single PDF.
  * @param {string} projectId your Google Cloud project ID
- * @param {string} location region to use for this operation
  * @param {string} gcsInputUri Cloud Storage URI of the PDF document to parse
  */
 async function main(
   projectId,
-  location = 'europe-west2',
   gcsInputUri = 'gs://cloud-samples-data/documentai/invoice.pdf'
 ) {
   // [START documentai_set_endpoint]
@@ -31,7 +29,6 @@ async function main(
    * TODO(developer): Uncomment these variables before running the sample.
    */
   // const projectId = 'YOUR_PROJECT_ID';
-  // const location = 'Location for operation--must match region of endpoint';
   // const gcsInputUri = 'YOUR_SOURCE_PDF';
 
   const {
@@ -44,7 +41,7 @@ async function main(
 
   async function setEndpoint() {
     // Configure the request for processing the PDF
-    const parent = `projects/${projectId}/locations/${location}`;
+    const parent = `projects/${projectId}`;
     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 72602c5533..55bf7a088f 100644
--- a/document-ai/test/batch_parse_form.test.js
+++ b/document-ai/test/batch_parse_form.test.js
@@ -28,7 +28,6 @@ const cmd = 'node batch_parse_form.js';
 
 const testParseForm = {
   projectId: process.env.GCLOUD_PROJECT,
-  location: 'us-central1',
   gcsOutputUriPrefix: uuid.v4(),
 };
 
@@ -45,7 +44,7 @@ describe('Document AI batch parse form', () => {
 
   it('should parse the GCS invoice example as a form', async () => {
     const output = execSync(
-      `${cmd} ${testParseForm.projectId} ${testParseForm.location} gs://${bucketName}`
+      `${cmd} ${testParseForm.projectId} gs://${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 f57cd3a4f9..65b78ba1b3 100644
--- a/document-ai/test/batch_parse_table.test.js
+++ b/document-ai/test/batch_parse_table.test.js
@@ -28,7 +28,6 @@ const cmd = 'node batch_parse_table.js';
 
 const testParseTable = {
   projectId: process.env.GCLOUD_PROJECT,
-  location: 'us-central1',
   gcsOutputUriPrefix: uuid.v4(),
 };
 
@@ -45,7 +44,7 @@ describe('Document AI batch parse table', () => {
 
   it('should parse the GCS invoice example as as table', async () => {
     const output = execSync(
-      `${cmd} ${testParseTable.projectId} ${testParseTable.location} gs://${bucketName}`
+      `${cmd} ${testParseTable.projectId} gs://${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 1b17e6242d..4108a23f2c 100644
--- a/document-ai/test/parse_form.test.js
+++ b/document-ai/test/parse_form.test.js
@@ -23,11 +23,10 @@ const execSync = cmd => cp.execSync(cmd, {encoding: 'utf-8'});
 
 const cwd = path.join(__dirname, '..');
 const projectId = process.env.GCLOUD_PROJECT;
-const LOCATION = 'us-central1';
 
 describe('Document AI parse form', () => {
   it('should parse the GCS invoice example as a form', async () => {
-    const stdout = execSync(`node ./parse_form.js ${projectId} ${LOCATION}`, {
+    const stdout = execSync(`node ./parse_form.js ${projectId}`, {
       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 a2cc481b63..fcace94dee 100644
--- a/document-ai/test/parse_table.test.js
+++ b/document-ai/test/parse_table.test.js
@@ -23,11 +23,10 @@ const execSync = cmd => cp.execSync(cmd, {encoding: 'utf-8'});
 
 const cwd = path.join(__dirname, '..');
 const projectId = process.env.GCLOUD_PROJECT;
-const LOCATION = 'us-central1';
 
 describe('Document AI parse table', () => {
   it('should parse the GCS invoice example as as table', async () => {
-    const stdout = execSync(`node ./parse_table.js ${projectId} ${LOCATION}`, {
+    const stdout = execSync(`node ./parse_table.js ${projectId}`, {
       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 7857863362..b976bda61a 100644
--- a/document-ai/test/parse_with_model.test.js
+++ b/document-ai/test/parse_with_model.test.js
@@ -23,7 +23,6 @@ const execSync = cmd => cp.execSync(cmd, {encoding: 'utf-8'});
 
 const cwd = path.join(__dirname, '..');
 const projectId = process.env.GCLOUD_PROJECT;
-const LOCATION = 'us-central1';
 const MODEL_NAME =
   process.env.MODEL_NAME ||
   'projects/1046198160504/locations/us-central1/models/TCN7483069430457434112';
@@ -31,7 +30,7 @@ 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} ${LOCATION} ${MODEL_NAME}`,
+      `node ./parse_with_model.js ${projectId} ${MODEL_NAME}`,
       {
         cwd,
       }
diff --git a/document-ai/test/quickstart.test.js b/document-ai/test/quickstart.test.js
index 9a32e02e77..63c2285ba6 100644
--- a/document-ai/test/quickstart.test.js
+++ b/document-ai/test/quickstart.test.js
@@ -23,11 +23,10 @@ const execSync = cmd => cp.execSync(cmd, {encoding: 'utf-8'});
 
 const cwd = path.join(__dirname, '..');
 const projectId = process.env.GCLOUD_PROJECT;
-const LOCATION = 'us-central1';
 
 describe('Quickstart', () => {
   it('should run quickstart', async () => {
-    const stdout = execSync(`node ./quickstart.js ${projectId} ${LOCATION}`, {
+    const stdout = execSync(`node ./quickstart.js ${projectId}`, {
       cwd,
     });
     assert.match(stdout, /Entity/);
diff --git a/document-ai/test/set_endpoint.test.js b/document-ai/test/set_endpoint.test.js
index 279186dc30..92c96a11c5 100644
--- a/document-ai/test/set_endpoint.test.js
+++ b/document-ai/test/set_endpoint.test.js
@@ -23,11 +23,10 @@ const execSync = cmd => cp.execSync(cmd, {encoding: 'utf-8'});
 
 const cwd = path.join(__dirname, '..');
 const projectId = process.env.GCLOUD_PROJECT;
-const LOCATION = 'europe-west2';
 
 describe('Document AI set endpoint', () => {
   it('should process a PDF in another region', async () => {
-    const stdout = execSync(`node ./set_endpoint.js ${projectId} ${LOCATION}`, {
+    const stdout = execSync(`node ./set_endpoint.js ${projectId}`, {
       cwd,
     });
     assert.match(stdout, /Entity/);