diff --git a/runtime_tests_grad.cpp b/runtime_tests_grad.cpp
index a3571d0..206c7c9 100644
--- a/runtime_tests_grad.cpp
+++ b/runtime_tests_grad.cpp
@@ -7,6 +7,9 @@
 // > sourceCpp('runtime_tests_grad.cpp')
 //
 
+// // #define ARMA_DONT_USE_WRAPPER
+// #define ARMA_DONT_USE_BLAS
+
 // [[Rcpp::depends(RcppArmadillo)]]
 #include <RcppArmadillo.h>
 #include <math.h>
@@ -102,7 +105,7 @@ arma::mat grad(const arma::mat& X,
         }
     }
 
-    // weighted first, secend order responce means `y1`, `y2`
+    // weighted first, second order responce means `y1`, `y2`
     // and component wise Loss `L(i) = L_n(V, X_i)`
     vec y1(n);
     vec y2(n);
@@ -376,7 +379,7 @@ setup.tests <- function () {
 }
 mbm <- microbenchmark(
     arma = arma_grad(X, X_diff, Y, Y_rep, V, h),
-    grad = grad(Xt, Y, V, h),
+    # grad = grad(Xt, Y, V, h),
     grad_p = grad_p(Xt, Y, V, h),
     check = comp.all,
     setup = setup.tests(),