diff --git a/pyro/compressible_fv4/simulation.py b/pyro/compressible_fv4/simulation.py
index a88d64696..f7c44a8df 100644
--- a/pyro/compressible_fv4/simulation.py
+++ b/pyro/compressible_fv4/simulation.py
@@ -9,9 +9,6 @@ def __init__(self, solver_name, problem_name, rp, *,
                  timers=None, data_class=fv.FV2d):
         super().__init__(solver_name, problem_name, rp, timers=timers, data_class=data_class)
 
-    def initialize(self, *, extra_vars=None, ng=5):
-        super().initialize(extra_vars=extra_vars, ng=ng)
-
     def substep(self, myd):
         """
         compute the advective source term for the given state
diff --git a/pyro/compressible_fv4/tests/acoustic_pulse_0160.h5 b/pyro/compressible_fv4/tests/acoustic_pulse_0160.h5
index c71c4c021..70930f4b2 100644
Binary files a/pyro/compressible_fv4/tests/acoustic_pulse_0160.h5 and b/pyro/compressible_fv4/tests/acoustic_pulse_0160.h5 differ
diff --git a/pyro/compressible_sdc/tests/acoustic_pulse_0160.h5 b/pyro/compressible_sdc/tests/acoustic_pulse_0160.h5
index a588547f3..53ce86f1e 100644
Binary files a/pyro/compressible_sdc/tests/acoustic_pulse_0160.h5 and b/pyro/compressible_sdc/tests/acoustic_pulse_0160.h5 differ