Fix an incorrect fixture argument

test.py

@@ -139,7 +139,7 @@ def test_flux_splitting_uniform_grid(ctx_factory, flux_test_data_fixture):
     u.compare_arrays(fluxes_neg_dev.get(), data.char_fluxes_neg)
 
 
-def test_pointwise_eigenvalues_ideal_gas(ctx_factory, data):
+def test_pointwise_eigenvalues_ideal_gas(ctx_factory, flux_test_data_fixture):
     data = flux_test_data_fixture
 
     prg = u.get_weno_program_with_root_kernel("pointwise_eigenvalues")