diff --git a/package-lock.json b/package-lock.json
index b7a5837..a43123b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
     "name": "codi-test-framework",
-    "version": "0.0.31",
+    "version": "0.0.32",
     "lockfileVersion": 3,
     "requires": true,
     "packages": {
         "": {
             "name": "codi-test-framework",
-            "version": "0.0.31",
+            "version": "0.0.32",
             "license": "MIT",
             "dependencies": {
                 "chalk": "^5.3.0",
diff --git a/src/assertions/assertNoDuplicates.js b/src/assertions/assertNoDuplicates.js
index 0bbda08..18536aa 100644
--- a/src/assertions/assertNoDuplicates.js
+++ b/src/assertions/assertNoDuplicates.js
@@ -2,8 +2,8 @@ import chalk from "chalk";
 
 export function assertNoDuplicates(arr, message) {
     //Filter array until for duplicate entries
-    arr => arr.filter((item, index) => arr.indexOf(item) !== index)
-    if (arr > 0) {
+    arr = arr.filter((item, index) => arr.indexOf(item) !== index)
+    if (arr.length > 0) {
         throw new Error(message || `Duplicates found: ${chalk.bold.yellow(arr)}`);
     }
 }
\ No newline at end of file
diff --git a/tests/example.test.mjs b/tests/example.test.mjs
index ac107d6..d4fea05 100644
--- a/tests/example.test.mjs
+++ b/tests/example.test.mjs
@@ -1,4 +1,4 @@
-import { describe, it, assertEqual, assertNotEqual, assertTrue, assertFalse, assertThrows } from '../src/testRunner.js';
+import { describe, it, assertEqual, assertNotEqual, assertTrue, assertFalse, assertThrows, assertNoDuplicates } from '../src/testRunner.js';
 
 import { helloworld } from '../example/example.mjs';
 
@@ -15,7 +15,7 @@ describe('I am an Example Test Suite', () => {
   });
 
   it('should pass inequality assertion', () => {
-    assertNotEqual(1, 2, 'Expected 1 not to equal 2');  
+    assertNotEqual(1, 2, 'Expected 1 not to equal 2');
   });
 
   it('should pass true assertion', () => {
@@ -38,4 +38,9 @@ describe('I am an Example Test Suite', () => {
     assertEqual(obj1, obj2, 'Expected objects to be deeply equal');
   });
 
+  it('should check for duplicates', () => {
+    const array = ['field1', 'field2']
+    assertNoDuplicates(array, 'There should be no duplicates');
+  });
+
 });
\ No newline at end of file