fix tests

test/integration.js

@@ -218,10 +218,11 @@ describe('Copay server', function() {
     it('should fail when requesting for non-existent copayer', function(done) {
       CopayServer.getInstanceWithAuth({
         copayerId: 'ads',
-          message: 'dummy',
-          signature: 'dummy',
+        message: TestData.message.text,
+        signature: TestData.message.signature,
       }, function(err, server) {
-          err.should.contain('Copayer not found');
+        err.code.should.equal('NOTAUTHORIZED');
+        err.message.should.contain('Copayer not found');
         done();
       });
     });
@@ -233,7 +234,8 @@ describe('Copay server', function() {
           message: 'dummy',
           signature: 'dummy',
         }, function(err, server) {
-            err.should.contain('Invalid signature');
+          err.code.should.equal('NOTAUTHORIZED');
+          err.message.should.contain('Invalid signature');
           done();
         });
       });