diff --git a/src/test/cases.ECEGO/branin.R b/src/test/cases.ECEGO/branin.R
index d518bdf..c854332 100644
--- a/src/test/cases.ECEGO/branin.R
+++ b/src/test/cases.ECEGO/branin.R
@@ -25,7 +25,7 @@ min.f = 0.3978874
 
 library(testthat)
 if (!isTRUE(test_that("f(armgin.f) == f.min",{expect_equal(f(matrix(argmin.f,nrow=1))[1],min.f,tolerance = .0001)}))) quit(status=1)
-if (!isTRUE(test_that("f_constr(armgin.f) == 0",{expect_equal(f(matrix(argmin.f,nrow=1))[1],0,tolerance = .0001)}))) quit(status=1)
+if (!isTRUE(test_that("f_constr(armgin.f) == 0",{expect_equal(f(matrix(argmin.f,nrow=1))[2],0,tolerance = .0001)}))) quit(status=1)
 
 test = function(algorithm_file) {
     results = run.algorithm(algorithm_file, options = list(nugget='0.1', nugget_constr='0.1'),fun=list(input=input.f,output=output.f))