diff --git a/test/ExprBindTest.hx b/test/ExprBindTest.hx
index 3d51172..e142d89 100644
--- a/test/ExprBindTest.hx
+++ b/test/ExprBindTest.hx
@@ -56,7 +56,7 @@ class ExprBindTest extends BuddySuite {
                 var from:Null<Int> = null;
                 
                 BindExt.expr(if (a.str.charAt(b.str.length) == Std.string(c.str)) 1 else 0, function (f:Null<Int>, to:Null<Int>) {
-                    f.should.be(from);
+                    (f == from).should.be(true); // f.should.be(from); cast f to Int
                     from = to;
                     to.should.be(val());
                     callNum ++;