diff --git a/src/utils/__tests__/openapi.test.ts b/src/utils/__tests__/openapi.test.ts
index 94fb1e0c93..9e511259f1 100644
--- a/src/utils/__tests__/openapi.test.ts
+++ b/src/utils/__tests__/openapi.test.ts
@@ -335,7 +335,8 @@ describe('Utils', () => {
       min: number | undefined = undefined,
       max: number | undefined = undefined,
       multipleOf: number | undefined = undefined,
-    ) => ({ type: 'array', minItems: min, maxItems: max, multipleOf });
+      uniqueItems?: boolean,
+    ) => ({ type: 'array', minItems: min, maxItems: max, multipleOf, uniqueItems });
 
     it('should not have a humanized constraint without schema constraints', () => {
       expect(humanizeConstraints(itemConstraintSchema())).toHaveLength(0);
@@ -372,6 +373,12 @@ describe('Utils', () => {
         'multiple of 0.5',
       );
     });
+
+    it('should have a humanized constraint when uniqueItems is set', () => {
+      expect(humanizeConstraints(itemConstraintSchema(undefined, undefined, undefined, true))).toContain(
+        'unique',
+      );
+    });
   });
 
   describe('OpenAPI pluralizeType', () => {
diff --git a/src/utils/openapi.ts b/src/utils/openapi.ts
index ad98c811b3..e20dbef9d6 100644
--- a/src/utils/openapi.ts
+++ b/src/utils/openapi.ts
@@ -448,6 +448,10 @@ export function humanizeConstraints(schema: OpenAPISchema): string[] {
     res.push(numberRange);
   }
 
+  if (schema.uniqueItems) {
+    res.push('unique');
+  }
+
   return res;
 }