diff --git a/myhdl/Simulation.py b/myhdl/Simulation.py
index 72707e3a..994261c7 100644
--- a/myhdl/Simulation.py
+++ b/myhdl/Simulation.py
@@ -37,10 +37,10 @@ from Cosimulation import Cosimulation
 from join import join
 from _Waiter import _Waiter
 from util import StopSimulation, SuspendSimulation
-try:
-    import simrunc
-except:
-    pass
+## try:
+##     import simrunc
+## except:
+##     pass
 
 
 schedule = _futureEvents.append
diff --git a/myhdl/intbv.py b/myhdl/intbv.py
index 37a528ff..3508135c 100644
--- a/myhdl/intbv.py
+++ b/myhdl/intbv.py
@@ -261,7 +261,9 @@ class intbv(object):
             self._val %= other
         return self
         
-    def __ipow__(self, other, modulo): # XXX why 3rd param required?
+    def __ipow__(self, other, modulo=None):
+        # XXX why 3rd param required?
+        # unused but needed in 2.2, not in 2.3 
         if type(other) is intbv:
             self._val **= other._val
         else:
diff --git a/myhdl/test_intbv.py b/myhdl/test_intbv.py
index f550364b..179bf637 100644
--- a/myhdl/test_intbv.py
+++ b/myhdl/test_intbv.py
@@ -261,11 +261,11 @@ class TestIntBvAsInt(TestCase):
     def binaryCheck(self, op, imin=0, imax=None, jmin=0, jmax=None):
         self.seqSetup(imin=imin, imax=imax, jmin=jmin, jmax=jmax)
         for i, j in zip(self.seqi, self.seqj):
-            bi = intbv(i)
+            bi = intbv(long(i))
             bj = intbv(j)
-            ref = op(i, j)
+            ref = op(long(i), j)
             r1 = op(bi, j)
-            r2 = op(i, bj)
+            r2 = op(long(i), bj)
             r3 = op(bi, bj)
             self.assertEqual(type(r1), intbv)
             self.assertEqual(type(r2), intbv)
@@ -278,13 +278,13 @@ class TestIntBvAsInt(TestCase):
         self.seqSetup(imin=imin, imax=imax, jmin=jmin, jmax=jmax)
         for i, j in zip(self.seqi, self.seqj):
             bj = intbv(j)
-            ref = i
+            ref = long(i)
             exec("ref %s j" % op)
-            r1 = bi1 = intbv(i)
+            r1 = bi1 = intbv(long(i))
             exec("r1 %s j" % op)
-            r2 = i 
+            r2 = long(i)
             exec("r2 %s bj" % op)
-            r3 = bi3 = intbv(i)
+            r3 = bi3 = intbv(long(i))
             exec("r3 %s bj" % op)
             self.assertEqual(type(r1), intbv)
             self.assertEqual(type(r3), intbv)