diff --git a/packages/bruno-app/src/components/RequestPane/Assertions/AssertionOperator/index.js b/packages/bruno-app/src/components/RequestPane/Assertions/AssertionOperator/index.js
index 1bc1c3f88..523fcf73d 100644
--- a/packages/bruno-app/src/components/RequestPane/Assertions/AssertionOperator/index.js
+++ b/packages/bruno-app/src/components/RequestPane/Assertions/AssertionOperator/index.js
@@ -20,6 +20,7 @@ import React from 'react';
  * endsWith    : ends with
  * between     : between
  * isEmpty     : is empty
+ * isNotEmpty  : is not empty
  * isNull      : is null
  * isUndefined : is undefined
  * isDefined   : is defined
@@ -51,6 +52,7 @@ const AssertionOperator = ({ operator, onChange }) => {
     'endsWith',
     'between',
     'isEmpty',
+    'isNotEmpty',
     'isNull',
     'isUndefined',
     'isDefined',
diff --git a/packages/bruno-app/src/components/RequestPane/Assertions/AssertionRow/index.js b/packages/bruno-app/src/components/RequestPane/Assertions/AssertionRow/index.js
index 38250f8ea..953db9e8d 100644
--- a/packages/bruno-app/src/components/RequestPane/Assertions/AssertionRow/index.js
+++ b/packages/bruno-app/src/components/RequestPane/Assertions/AssertionRow/index.js
@@ -24,6 +24,7 @@ import { useTheme } from 'providers/Theme';
  * endsWith    : ends with
  * between     : between
  * isEmpty     : is empty
+ * isNotEmpty  : is not empty
  * isNull      : is null
  * isUndefined : is undefined
  * isDefined   : is defined
@@ -61,6 +62,7 @@ const parseAssertionOperator = (str = '') => {
     'endsWith',
     'between',
     'isEmpty',
+    'isNotEmpty',
     'isNull',
     'isUndefined',
     'isDefined',
@@ -75,6 +77,7 @@ const parseAssertionOperator = (str = '') => {
 
   const unaryOperators = [
     'isEmpty',
+    'isNotEmpty',
     'isNull',
     'isUndefined',
     'isDefined',
@@ -113,6 +116,7 @@ const parseAssertionOperator = (str = '') => {
 const isUnaryOperator = (operator) => {
   const unaryOperators = [
     'isEmpty',
+    'isNotEmpty',
     'isNull',
     'isUndefined',
     'isDefined',
diff --git a/packages/bruno-js/src/runtime/assert-runtime.js b/packages/bruno-js/src/runtime/assert-runtime.js
index b338730cc..4132fea9c 100644
--- a/packages/bruno-js/src/runtime/assert-runtime.js
+++ b/packages/bruno-js/src/runtime/assert-runtime.js
@@ -58,6 +58,7 @@ chai.use(function (chai, utils) {
  * endsWith    : ends with
  * between     : between
  * isEmpty     : is empty
+ * isNotEmpty  : is not empty
  * isNull      : is null
  * isUndefined : is undefined
  * isDefined   : is defined
@@ -95,6 +96,7 @@ const parseAssertionOperator = (str = '') => {
     'endsWith',
     'between',
     'isEmpty',
+    'isNotEmpty',
     'isNull',
     'isUndefined',
     'isDefined',
@@ -109,6 +111,7 @@ const parseAssertionOperator = (str = '') => {
 
   const unaryOperators = [
     'isEmpty',
+    'isNotEmpty',
     'isNull',
     'isUndefined',
     'isDefined',
@@ -147,6 +150,7 @@ const parseAssertionOperator = (str = '') => {
 const isUnaryOperator = (operator) => {
   const unaryOperators = [
     'isEmpty',
+    'isNotEmpty',
     'isNull',
     'isUndefined',
     'isDefined',
@@ -345,6 +349,9 @@ class AssertRuntime {
           case 'isEmpty':
             expect(lhs).to.be.empty;
             break;
+          case 'isNotEmpty':
+            expect(lhs).to.not.be.empty;
+            break;
           case 'isNull':
             expect(lhs).to.be.null;
             break;