diff --git a/src/pymatlib/core/cpp/TestArrayContainer.py b/src/pymatlib/core/cpp/TestArrayContainer.py
index 6a37b6e8dc37027494ec210df167e72e6ff95f05..af9fe9edd461ced6da472345e30bbf1af7390b76 100644
--- a/src/pymatlib/core/cpp/TestArrayContainer.py
+++ b/src/pymatlib/core/cpp/TestArrayContainer.py
@@ -11,8 +11,11 @@ with SourceFileGenerator() as sfg:
     arr_container = DoubleLookupArrayContainer.from_material("SS316L", mat)
     sfg.generate(arr_container)'''
 
+    T = np.array([3243.15, 3253.15, 3263.15, 3273.15], dtype=np.float64)
+    E = np.array([1.68e10, 1.69e10, 1.70e10, 1.71e10], dtype=np.float64)
 
-    custom_container = InterpolationArrayContainer("DoubleLookupTests",
-                                       np.array([3243.15, 3253.15, 3263.15, 3273.15], dtype=np.float64),
-                                       np.array([1.68e10, 1.69e10, 1.70e10, 1.71e10], dtype=np.float64))
+    custom_container = InterpolationArrayContainer("DoubleLookupTests", np.flip(T), np.flip(E))
     sfg.generate(custom_container)
+
+    custom_container = InterpolationArrayContainer("BinarySearchTests", T, E)
+    sfg.generate(custom_container)
\ No newline at end of file