diff --git a/tests/validation/fixtures/Box3x3Fixture.h b/tests/validation/fixtures/Box3x3Fixture.h
index a53987a..1aa958a 100644
--- a/tests/validation/fixtures/Box3x3Fixture.h
+++ b/tests/validation/fixtures/Box3x3Fixture.h
@@ -52,8 +52,9 @@
         std::uniform_int_distribution<uint8_t> distribution(0, 255);
         const uint8_t                          constant_border_value = distribution(gen);
 
-        _target    = compute_target(shape, data_type, border_mode, constant_border_value);
-        _reference = compute_reference(shape, data_type, border_mode, constant_border_value);
+        _border_mode = border_mode;
+        _target      = compute_target(shape, data_type, border_mode, constant_border_value);
+        _reference   = compute_reference(shape, data_type, border_mode, constant_border_value);
     }
 
 protected: