diff --git a/test/triqs/arrays/serialization.cpp b/test/triqs/arrays/serialization.cpp
index b511cb2d..5737b269 100644
--- a/test/triqs/arrays/serialization.cpp
+++ b/test/triqs/arrays/serialization.cpp
@@ -19,6 +19,7 @@
  * TRIQS. If not, see <http://www.gnu.org/licenses/>.
  *
  ******************************************************************************/
+#define TRIQS_ARRAYS_ENFORCE_BOUNDCHECK
 
 #include "./common.hpp"
 #include "./src/array.hpp"
@@ -69,7 +70,9 @@ int main(int argc, char **argv) {
   ia >> A>> SL;
   // archive and stream closed when destructors are called
  }
+ 
  std::cout<<"A is "<<A<<std::endl;
+ 
  std::cout<<"SLICE : A(0,range(0,3))  "<<SL<<std::endl;
 
  std::cout<<"Setting A(0,0) =56 "<<std::endl;
diff --git a/test/triqs/arrays/temp_slice.cpp b/test/triqs/arrays/temp_slice.cpp
index 7887307b..62c69a12 100644
--- a/test/triqs/arrays/temp_slice.cpp
+++ b/test/triqs/arrays/temp_slice.cpp
@@ -61,6 +61,9 @@ int main(int argc, char **argv) {
    std::cerr  << " good "<< r << r.storage().is_weak << std::endl ;
   }
 
+// rm or valgrind will find the error
+//#define VALGRIND
+#ifndef VALGRIND
   {
    auto & r = bad2 ( { 1,2,3,4} );
    std::cerr  << " bad2 " << r << std::endl ;
@@ -70,6 +73,7 @@ int main(int argc, char **argv) {
    auto r = bad ( { 1,2,3,4} );
    std::cerr  << " bad " << r << r.storage().is_weak << std::endl ;
   }
+#endif
 
  }
  catch (std::exception & e) { std::cout << e.what()<<std::endl;}