diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index eb2029b..4498417 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -30,10 +30,20 @@ jobs:
           nrnivmodl -coreneuron mod/
       - name: Run ringtest
         run:  |
-          # Test NEURON
-          python ringtest.py -tstop 100
-          diff spk1.std reference_data/spk1.100ms.std.ref
-          # Test CoreNEURON
-          python ringtest.py -coreneuron -tstop 100
-          sortspike spk1.std spk1.coreneuron.std
-          diff spk1.coreneuron.std reference_data/spk1.100ms.std.ref
+          # Get NEURON major version
+          NRNVER=$(python -c 'import neuron; print(neuron.__version__.split(".")[0])')
+          echo "NEURON major version: ${NRNVER}"
+
+          if [ "$NRNVER" -ge 9 ]; then
+            # 8.2 coreneuron mod files comment out TABLE statements
+            # so only do the tests if >= 9
+
+            # Test NEURON
+            python ringtest.py -tstop 100
+            diff spk1.std reference_data/spk1.100ms.std.ref
+
+            # Test CoreNEURON
+            python ringtest.py -coreneuron -tstop 100
+            sortspike spk1.std spk1.coreneuron.std
+            diff spk1.coreneuron.std reference_data/spk1.100ms.std.ref
+          fi
diff --git a/args.py b/args.py
index 0c43683..cec9c97 100644
--- a/args.py
+++ b/args.py
@@ -42,6 +42,19 @@
                     type=float,
                     default=100.)
 
+parser.add_argument("-method",
+                    dest='method',
+                    metavar='N',
+                    help="0-fixed, 1-global cvode, 2-local cvode",
+                    type=int,
+                    default=0)
+
+parser.add_argument("-2nd_order_thresh",
+                   dest='thresh_order2',
+                   action='store_true',
+                   help="2nd order correct threshold detection (cvode only)",
+                   default=False)
+
 parser.add_argument("-gran",
                     metavar='N',
                     help="global Random123 index (default 0)",
diff --git a/ringtest.py b/ringtest.py
index 00345ca..be04886 100644
--- a/ringtest.py
+++ b/ringtest.py
@@ -24,6 +24,12 @@
 # stop time of simulation
 tstop = args.tstop
 
+# Which integration method to use
+method = args.method
+
+# Cvode threshold detection --- first or second order
+condition_order = 2 if args.thresh_order2 else 1
+
 # whether to randomize cell parameters
 randomize_parameters = args.rparm
 
@@ -76,6 +82,9 @@
     print ("%s %s" % (str(nbranch), str(ncompart)))
     print ("nring=%d\ncell per ring=%d\nncell_per_type=%d" % (nring, ncell, ncell_per_type))
     print ("ntype=%d" % ntype)
+    methname=["fixed", "global vardt, ", "local vardt, "]
+    co = "condition_order="+str(condition_order) if method else ""
+    print ("method = %s %s" % (methname[method], co))
 
 #from cell import BallStick
 h.load_file("cell.hoc")
@@ -195,6 +204,11 @@ def create_rings():
 
     ## Initialize ##
 
+    if method > 0:
+        h.cvode.condition_order(condition_order)
+        h.cvode.active(1)
+        if method == 2:
+            h.cvode.use_local_dt(1)
     pc.set_maxstep(10)
     h.stdinit()
     timeit("initialized", settings.rank)