diff --git a/src/test/simulation.js b/src/test/simulation.js
index dd06c33a8aef4fb0fb7915453a1be48eb4e6f85c..91996ce1774c283f522aa7a0d431c76476aeab11 100644
--- a/src/test/simulation.js
+++ b/src/test/simulation.js
@@ -425,8 +425,8 @@ describe('Requires a simulation', () => {
             .end((err, res) => {
                 res.should.have.status(400);
                 res.should.be.json;
-                res.body.should.have.property('message');
-                res.body.message.should.equal('Invalid value for mandatory parameter max_time');
+                res.body.should.have.property('error');
+                res.body.error.should.equal('Invalid value for mandatory parameter max_time');
                 done();
             });
     });