diff --git a/pipelined/regression/regression-wally b/pipelined/regression/regression-wally
index 8bb8ad21..3b5fc3a7 100755
--- a/pipelined/regression/regression-wally
+++ b/pipelined/regression/regression-wally
@@ -103,7 +103,7 @@ for test in tests32e:
 ahbTests = [("0", "0"), ("0", "1"), ("1", "0"), ("1", "1"), ("2", "0"), ("2", "1")] 
 for test in ahbTests:
   tc = TestCase(
-        name="RAM_LATENCH_" + test[0] + "_BURST_EN_" + test[1],
+        name="ram_latency_" + test[0] + "_burst_en_" + test[1],
         variant="ahb",
         cmd="vsim > {} -c <<!\ndo wally-pipelined-batch.do rv64gc ahb "+test[0]+" "+test[1]+"\n!",
         grepstr="All tests ran without failures")
diff --git a/pipelined/regression/wally-pipelined-batch.do b/pipelined/regression/wally-pipelined-batch.do
index 146ab04c..1e70e234 100644
--- a/pipelined/regression/wally-pipelined-batch.do
+++ b/pipelined/regression/wally-pipelined-batch.do
@@ -20,11 +20,17 @@
 onbreak {resume}
 
 # create library
-if [file exists wkdir/work_${1}_${2}] {
-    vdel -lib wkdir/work_${1}_${2} -all
+if {$2 eq "ahb"} {
+    if [file exists wkdir/work_${1}_${2}_${3}_${4}] {
+        vdel -lib wkdir/work_${1}_${2}_${3}_${4} -all
+    }
+    vlib wkdir/work_${1}_${2}_${3}_${4}
+} else {
+    if [file exists wkdir/work_${1}_${2}] {
+        vdel -lib wkdir/work_${1}_${2} -all
+    }
+    vlib wkdir/work_${1}_${2}
 }
-vlib wkdir/work_${1}_${2}
-
 # compile source files
 # suppress spurious warnngs about 
 # "Extra checking for conflicts with always_comb done at vopt time"