diff --git a/scripts/flow/flow_validation.py b/scripts/flow/flow_validation.py
index 7c015f1..ec07630 100644
--- a/scripts/flow/flow_validation.py
+++ b/scripts/flow/flow_validation.py
@@ -296,9 +296,9 @@ if __name__ == "__main__":
     num_epochs = 50
     inference_method = "mike"
     mag_selection = None
-    sample_alpha = False if "IndranilVoid_" in ARGS.simname else True
+    sample_alpha = False if "IndranilVoid_" in ARGS.simname or ARGS.simname == "no_field" else True  # noqa
     sample_beta = None
-    no_Vext = True
+    no_Vext = None
     sample_Vmono = False
     sample_mag_dipole = False
     absolute_calibration = None