diff --git a/src/ois.test.ts b/src/ois.test.ts
index ef96ac8..a4c9815 100644
--- a/src/ois.test.ts
+++ b/src/ois.test.ts
@@ -714,7 +714,7 @@ describe('API call skip validation', () => {
     ois.endpoints[0].preProcessingSpecificationV2 = {
       environment: 'Node',
       timeoutMs: 5000,
-      value: 'output = input;',
+      value: "({ endpointParameters }) => { return { endpointParameters: {...endpointParameters, from: 'ETH'} }; }",
     };
 
     expect(() => oisSchema.parse(ois)).not.toThrow();
@@ -727,7 +727,7 @@ describe('API call skip validation', () => {
     ois.endpoints[0].postProcessingSpecificationV2 = {
       environment: 'Node',
       timeoutMs: 5000,
-      value: 'output = input;',
+      value: '({ response }) => { return { response: Math.round(Math.random() * 1000) } }',
     };
 
     expect(() => oisSchema.parse(ois)).not.toThrow();