diff --git a/wally-pipelined/regression/regression-wally.py b/wally-pipelined/regression/regression-wally.py
index a352c375..83fa703e 100755
--- a/wally-pipelined/regression/regression-wally.py
+++ b/wally-pipelined/regression/regression-wally.py
@@ -25,7 +25,7 @@ def test_config(config, print_res=True):
   logname = "wally_"+config+".log"
   if config == "busybear":
     # Handle busybear separately
-    cmd = "echo 'quit' | vsim -do wally-busybear.do -c >" + logname
+    cmd = "vsim -do wally-busybear-batch.do -c >" + logname
     os.system(cmd)
     # check for success.  grep returns 0 if found, 1 if not found
     passed = search_log_for_text("# loaded 800000 instructions", logname)