diff --git a/unittests/math_dec.chai b/unittests/math_dec.chai
index 4ece194..40d588d 100644
--- a/unittests/math_dec.chai
+++ b/unittests/math_dec.chai
@@ -1 +1,2 @@
-print(--3)
+var i = 3
+print(--i)
diff --git a/unittests/math_inc.chai b/unittests/math_inc.chai
index 6d00ac0..e39d73a 100644
--- a/unittests/math_inc.chai
+++ b/unittests/math_inc.chai
@@ -1 +1,2 @@
-print(++3)
+var i = 3
+print(++i)