diff --git a/tests/regression_tests/lattice_hex_OX/__init__.py b/tests/regression_tests/lattice_hex_x/__init__.py
similarity index 100%
rename from tests/regression_tests/lattice_hex_OX/__init__.py
rename to tests/regression_tests/lattice_hex_x/__init__.py
diff --git a/tests/regression_tests/lattice_hex_OX/inputs_true.dat b/tests/regression_tests/lattice_hex_x/inputs_true.dat
similarity index 100%
rename from tests/regression_tests/lattice_hex_OX/inputs_true.dat
rename to tests/regression_tests/lattice_hex_x/inputs_true.dat
diff --git a/tests/regression_tests/lattice_hex_OX/results_true.dat b/tests/regression_tests/lattice_hex_x/results_true.dat
similarity index 100%
rename from tests/regression_tests/lattice_hex_OX/results_true.dat
rename to tests/regression_tests/lattice_hex_x/results_true.dat
diff --git a/tests/regression_tests/lattice_hex_OX/test.py b/tests/regression_tests/lattice_hex_x/test.py
similarity index 100%
rename from tests/regression_tests/lattice_hex_OX/test.py
rename to tests/regression_tests/lattice_hex_x/test.py