diff --git a/demo/node/rntuple_test.js b/demo/node/rntuple_test.js
index c7706001f..149f2077a 100644
--- a/demo/node/rntuple_test.js
+++ b/demo/node/rntuple_test.js
@@ -1,18 +1,18 @@
-import { version, openFile } from 'jsroot';
+import { version, openFile, TSelector } from 'jsroot';
 
-import { readHeaderFooter } from 'jsroot/rntuple';
+import { readHeaderFooter, readEntry, rntupleProcess } from 'jsroot/rntuple';
 
 console.log(`JSROOT version ${version}`);
 // const file = await openFile('https://jsroot.gsi.de/files/tmp/ntpl001_staff.root'),
 // rntuple = await file.readObject('Staff');
-const file = await openFile('simple.root'),
-rntuple = await file.readObject('myNtuple');
+const file = await openFile('./rntuple_test.root'),
+rntuple = await file.readObject('Data');
 
 await readHeaderFooter(rntuple);
 
 console.log('Performing Validations and debugging info');
 
-if (rntuple.builder?.name !== 'Staff')
+if (rntuple.builder?.name !== 'Data')
   console.error('FAILURE: name differs from expected');
 else
   console.log('OK: name is', rntuple.builder?.name);
@@ -21,7 +21,7 @@ else
 if (rntuple.builder?.description !== '')
   console.error('FAILURE: description should be the empty string');
 else
-  console.log('OK: description is', rntuple.builder.description);
+  console.log('OK: description is empty string');
 
 if (rntuple.builder?.xxhash3 === undefined || rntuple.builder.xxhash3 === null)
   console.warn('WARNING: xxhash3 is missing');
@@ -41,11 +41,11 @@ else {
     else
       console.log(`OK: Field ${i}: ${field.fieldName} (${field.typeName})`);
     if (i === 0) {
-      if (field.fieldName !== 'Category' || field.typeName !== 'std::int32_t') 
-        console.error(`FAILURE: First field should be 'Category (std::int32_t)' but got '${field.fieldName} (${field.typeName})'`);     
+      if (field.fieldName !== 'IntField' || field.typeName !== 'std::int32_t') 
+        console.error(`FAILURE: First field should be 'IntField (std::int32_t)' but got '${field.fieldName} (${field.typeName})'`);     
     } else if (i === rntuple.builder.fieldDescriptors.length - 1){
-      if (field.fieldName !== 'Nation' || field.typeName !== 'std::string')
-        console.error(`FAILURE: Last field should be 'Nation (std::string)' but got '${field.fieldName} (${field.typeName})'`);      
+      if (field.fieldName !== 'StringField' || field.typeName !== 'std::string')
+        console.error(`FAILURE: Last field should be 'StringField (std::string)' but got '${field.fieldName} (${field.typeName})'`);      
     }
   }
 }
@@ -64,10 +64,58 @@ else {
       console.log(`OK: Column ${i} fieldId: ${column.fieldId} `);
     if (i === 0) {
       if (column.fieldId !== 0)
-        console.error('FAILURE: First column should be for fieldId 0 (Category)');
+        console.error('FAILURE: First column should be for fieldId 0 (IntField)');
     } else if (i === rntuple.builder.columnDescriptors.length - 1){
-      if (column.fieldId !== 10)
-        console.error('FAILURE: Last column should be for fieldId 10 (Nation)');
+      if (column.fieldId !== 3)
+        console.error('FAILURE: Last column should be for fieldId 3 (StringField)');
+    }
+  }
+}
+
+// Setup selector to process all fields (so cluster gets loaded)
+const selector = new TSelector(),
+      fields = ['IntField', 'FloatField', 'DoubleField', 'StringField'];
+for (const f of fields) selector.addBranch(f);
+
+selector.Begin = () => {
+  console.log('\nBegin processing to load cluster data...');
+};
+selector.Process = function() {};
+selector.Terminate = () => {
+  console.log('Finished dummy processing');
+};
+
+// Run rntupleProcess to ensure cluster is loaded
+await rntupleProcess(rntuple, selector);
+
+// Now validate entry data
+const EPSILON = 1e-10;
+
+for (let entryIndex = 0; entryIndex < 10; ++entryIndex) {
+  console.log(`\nChecking entry ${entryIndex}:`);
+  
+  const expected = {
+    IntField: entryIndex,
+    FloatField: entryIndex * entryIndex,
+    DoubleField: entryIndex * 0.5,
+    StringField: `entry_${entryIndex}`
+  };
+
+  for (const field of fields) {
+    try {
+      const value = readEntry(rntuple, field, entryIndex),
+            expectedValue = expected[field],
+
+      pass = typeof value === 'number'
+        ? Math.abs(value - expectedValue) < EPSILON
+        : value === expectedValue;
+
+      if (!pass)
+        console.error(`FAILURE: ${field} at entry ${entryIndex} expected ${expectedValue}, got ${value}`);
+      else
+        console.log(`OK: ${field} at entry ${entryIndex} = ${value}`);
+    } catch (err) {
+      console.error(`ERROR: Failed to read ${field} at entry ${entryIndex}: ${err.message}`);
     }
   }
 }
\ No newline at end of file
diff --git a/demo/node/rntuple_test.root b/demo/node/rntuple_test.root
new file mode 100644
index 000000000..28830eb60
Binary files /dev/null and b/demo/node/rntuple_test.root differ
diff --git a/modules/rntuple.mjs b/modules/rntuple.mjs
index 4381627db..fba4af2dc 100644
--- a/modules/rntuple.mjs
+++ b/modules/rntuple.mjs
@@ -928,4 +928,4 @@ async function tupleHierarchy(tuple_node, tuple) {
     });
 }
 
-export { tupleHierarchy, readHeaderFooter, RBufferReader, rntupleProcess };
\ No newline at end of file
+export { tupleHierarchy, readHeaderFooter, RBufferReader, rntupleProcess, readEntry };
\ No newline at end of file