diff --git a/tests/common/testUtils.h b/tests/common/testUtils.h
index 9c94a422d..9294b6c1a 100644
--- a/tests/common/testUtils.h
+++ b/tests/common/testUtils.h
@@ -341,3 +341,12 @@ typename DataPoint::Scalar getKappaMean(const std::vector<DataPoint>& _vectorPoi
 
     return kappaMean / nbNei;
 }
+
+// compile-time and run-time check if a given value is true or false
+// this template function is required because "Outside a template, a discarded 
+// statement is fully checked." (cppreference.com/w/cpp/language/if) 
+template<bool b>
+void CHECK() {
+    static_assert(b);
+    VERIFY(b);
+}
\ No newline at end of file
diff --git a/tests/src/capability.cpp b/tests/src/capability.cpp
index 97a8fda99..da8971d54 100644
--- a/tests/src/capability.cpp
+++ b/tests/src/capability.cpp
@@ -27,15 +27,6 @@ using DataPoint = PointPosition<float, Dim>;
 using Kernel = ConstantWeightKernel<float>;
 using WeightFunc = DistWeightFunc<DataPoint, Kernel>;
 
-// compile-time and run-time check if a given value is true or false
-// this template function is required because "Outside a template, a discarded 
-// statement is fully checked." (cppreference.com/w/cpp/language/if) 
-template<bool b>
-void CHECK() {
-    static_assert(b);
-    VERIFY(b);
-}
-
 // extension that test if PLANE is provided
 template<class P, class W, typename T>
 class InitTestExtensionPlane : public T