diff --git a/test/data/helmholtz/test_adiabatic_layer.py b/test/data/helmholtz/test_adiabatic_layer.py new file mode 100644 index 00000000..e69de29b diff --git a/test/data/helmholtz/test_c_shaped_crystals.py b/test/data/helmholtz/test_c_shaped_crystals.py new file mode 100644 index 00000000..e69de29b diff --git a/test/data/helmholtz/test_cylindrical_crystals.py b/test/data/helmholtz/test_cylindrical_crystals.py new file mode 100644 index 00000000..e69de29b