diff --git a/Exec/radiation_tests/RadSuOlsonMG/inputs.common b/Exec/radiation_tests/RadSuOlsonMG/inputs.common
index a4f04069c1..50612a32a5 100644
--- a/Exec/radiation_tests/RadSuOlsonMG/inputs.common
+++ b/Exec/radiation_tests/RadSuOlsonMG/inputs.common
@@ -8,7 +8,7 @@ geometry.is_periodic = 0 0 0
 geometry.coord_sys = 0  # 0 => cart, 1 => RZ, 2 => Spherical
 
 geometry.prob_lo   =    0.0   0.0   0.0
-geometry.prob_hi   =  102.4   1.    1.    
+geometry.prob_hi   =  102.4   0.8   0.8
 
 amr.n_cell   =  1024  8  8