diff --git a/src/mlpack/tests/rmsprop_test.cpp b/src/mlpack/tests/rmsprop_test.cpp
index bb556dc48c..3f95c558d6 100644
--- a/src/mlpack/tests/rmsprop_test.cpp
+++ b/src/mlpack/tests/rmsprop_test.cpp
@@ -29,9 +29,9 @@ BOOST_AUTO_TEST_CASE(SimpleRMSpropTestFunction)
   RMSprop<SGDTestFunction> optimizer(f, 1e-3, 0.99, 1e-8, 5000000, 1e-9, true);
 
   arma::mat coordinates = f.GetInitialPoint();
-  double result = optimizer.Optimize(coordinates);
+  const double result = optimizer.Optimize(coordinates);
 
-  BOOST_REQUIRE_CLOSE(result, -1.0, 0.05);
+  BOOST_REQUIRE_CLOSE(result, (double) -1.0, 0.15);
   BOOST_REQUIRE_SMALL(coordinates[0], 1e-3);
   BOOST_REQUIRE_SMALL(coordinates[1], 1e-3);
   BOOST_REQUIRE_SMALL(coordinates[2], 1e-3);