diff --git a/Solver/TESTCASES/BackwardFacingStep.lua b/Solver/TESTCASES/BackwardFacingStep.lua
index a6b545b27293b58a4c81bfac0fc56ea8867dc0a1..e474376ad9a10315e642d7f881350281120834c0 100644
--- a/Solver/TESTCASES/BackwardFacingStep.lua
+++ b/Solver/TESTCASES/BackwardFacingStep.lua
@@ -1,4 +1,4 @@
-MACH = 0.1;
+MACH = 3;
 RHO  = 1.0;
 PRES = 1./(MACH*RHO*RHO*1.4*1.4) 
 V = 1.0 
@@ -49,7 +49,7 @@ DG:exportSolution('output/solution_0')
 
 print'*** solve ***'
 
-LC = 0.1
+LC = 0.1*.1
 dt = .3*LC/(SOUND+V);
 print('DT=',dt)
 
diff --git a/Solver/TESTCASES/step.geo b/Solver/TESTCASES/step.geo
index 62afa73c6a7e652daf7fd6af7765e2162eb72279..b101b8c6dd916b18924ec1e295f0ccac8d43cd91 100644
--- a/Solver/TESTCASES/step.geo
+++ b/Solver/TESTCASES/step.geo
@@ -1,9 +1,9 @@
 Point(1) = {0, 0, 0, .1};
-Point(2) = {3, 0, 0, .1};
-Point(3) = {3, 1, 0, .1};
-Point(4) = {5, 1, 0, .1};
-Point(5) = {5, 2, 0, .1};
-Point(6) = {0, 2, 0, .1};
+Point(2) = {.5, 0, 0, .1};
+Point(3) = {.5, .25, 0, .1};
+Point(4) = {3, .25, 0, .1};
+Point(5) = {3, 1, 0, .1};
+Point(6) = {0, 1, 0, .1};
 Line(1) = {6, 5};
 Line(2) = {5, 4};
 Line(3) = {4, 3};