diff --git a/index.js b/index.js
index b5d166c6..d34d70c6 100644
--- a/index.js
+++ b/index.js
@@ -63,6 +63,10 @@ function setValidatorCompiler(instance, ajvOpts, noAdditional) {
   instance.setValidatorCompiler(({ schema, method, url, httpPart }) =>
     ajv.compile(schema)
   );
+
+  instance.setSchemaErrorFormatter(
+    (errors, dataVar) => new Error(ajv.errorsText(errors, { dataVar }))
+  );
 }
 
 function checkParserValidators(instance, contentTypes) {
diff --git a/test/test-petstore-example.js b/test/test-petstore-example.js
index f645d357..0c4c545b 100644
--- a/test/test-petstore-example.js
+++ b/test/test-petstore-example.js
@@ -33,7 +33,7 @@ test("/v2/pet/myPet returns Fastify validation error", t => {
     (err, res) => {
       t.error(err);
       t.equal(res.statusCode, 400);
-      t.equal(res.body, '{"statusCode":400,"error":"Bad Request","message":"params must be integer"}');
+      t.equal(res.body, '{"statusCode":400,"error":"Bad Request","message":"params/petId must be integer"}');
     }
   );
 });