diff --git a/README.md b/README.md
index 7bda276..7d0dd93 100644
--- a/README.md
+++ b/README.md
@@ -45,7 +45,7 @@ const client = new VlmRun({
 });
 
 // Process an image (using image url)
-imageUrl =
+const imageUrl =
   "https://storage.googleapis.com/vlm-data-public-prod/hub/examples/document.invoice/invoice_1.jpg";
 const response = await client.image.generate({
   images: [imageUrl],
@@ -94,7 +94,7 @@ const response = await client.document.generate({
 console.log(response);
 
 // Process a document (using url)
-documentUrl =
+const documentUrl =
   "https://storage.googleapis.com/vlm-data-public-prod/hub/examples/document.invoice/google_invoice.pdf";
 const response = await client.document.generate({
   url: documentUrl,
diff --git a/docs/CONTRIBUTING.md b/docs/CONTRIBUTING.md
index 1220644..0b9dfaf 100644
--- a/docs/CONTRIBUTING.md
+++ b/docs/CONTRIBUTING.md
@@ -40,8 +40,16 @@ npm install
 
 3. Run tests:
 
+Add .env.test file with the following variables:
+
+```bash
+TEST_API_KEY=<your-api-key>
+TEST_BASE_URL=https://dev.vlm.run/v1
+```
+
 ```bash
 npm test
+npm run test:integration
 ```
 
 ## Code Style