diff --git a/tests/test_cas_exp.py b/tests/test_cas_exp.py
index 9cfb12d..6cd2857 100644
--- a/tests/test_cas_exp.py
+++ b/tests/test_cas_exp.py
@@ -2,6 +2,8 @@
 import pickle
 from amoco.cas.expressions import *
 
+conf.Cas.complexity = 0
+
 def test_cst():
     c = cst(253,8)
     assert c == 0xfd
diff --git a/tests/test_cas_mapper.py b/tests/test_cas_mapper.py
index ae119d0..a427a16 100644
--- a/tests/test_cas_mapper.py
+++ b/tests/test_cas_mapper.py
@@ -2,6 +2,8 @@
 
 from amoco.cas.mapper import *
 
+conf.Cas.complexity = 0
+
 def test_slicing(m,x,y):
     m.clear()
     m[x] = cst(0xabcdef89,32)