diff --git a/test_data/sphere/config_two_layers.yml b/test_data/sphere/config_two_layers.yml
index ef4f19f3ecf7fefd2a9a05873d10e1df007a59a8..30cc120220cf16b07c54e5a5606056c23bdfcc34 100644
--- a/test_data/sphere/config_two_layers.yml
+++ b/test_data/sphere/config_two_layers.yml
@@ -47,7 +47,7 @@ material_settings:
   # External medium dielectric constant
   extern_diel : 1.000e+00
   # Dielectric constant files folder
-  dielec_path : "."
+  dielec_path : "../../ref_data"
   # List of dielectric constant files (used if diel_flag = 0)
   dielec_file : [ "eps_draine_Si.csv", "eps_ashok_C.csv"]
   # Dielectric constant files format (same for all files)