diff --git a/include/nmtools/testing/data/array/slice.hpp b/include/nmtools/testing/data/array/slice.hpp
index e3f839de5..d24d54144 100644
--- a/include/nmtools/testing/data/array/slice.hpp
+++ b/include/nmtools/testing/data/array/slice.hpp
@@ -4,6 +4,8 @@
 #include "nmtools/testing/testing.hpp"
 #include "nmtools/testing/array_cast.hpp"
 
+using nmtools_tuple;
+
 NMTOOLS_TESTING_DECLARE_CASE(array, slice)
 {
     using nmtools::array::static_vector;
diff --git a/include/nmtools/testing/data/index/slice.hpp b/include/nmtools/testing/data/index/slice.hpp
index 9d259e06f..d9b317a80 100644
--- a/include/nmtools/testing/data/index/slice.hpp
+++ b/include/nmtools/testing/data/index/slice.hpp
@@ -9,9 +9,10 @@ namespace nm = nmtools;
 namespace na = nm::array;
 namespace kind = na::kind;
 
+using nmtools_tuple;
+
 NMTOOLS_TESTING_DECLARE_CASE(index, shape_slice)
 {
-    using nmtools_tuple;
     using namespace nm::literals;
 
     NMTOOLS_TESTING_DECLARE_ARGS(case1)