diff --git a/unit_test/burn_cell_metal_chem/inputs_metal_chem_1 b/unit_test/burn_cell_metal_chem/inputs_metal_chem_1
index b121a6efd..b3e57d7bb 100644
--- a/unit_test/burn_cell_metal_chem/inputs_metal_chem_1
+++ b/unit_test/burn_cell_metal_chem/inputs_metal_chem_1
@@ -80,6 +80,7 @@ network.redshift = 0.0
 network.metallicity = 1
 network.dust2gas_ratio = 1
 network.small_x = 1e-60
+network.crate = 0.0
 
 # amrex runtime parameters
 # these params help debug the code