diff --git a/test/ExprBindTest.hx b/test/ExprBindTest.hx
index e142d89..d88cf4a 100644
--- a/test/ExprBindTest.hx
+++ b/test/ExprBindTest.hx
@@ -15,7 +15,9 @@ class ExprBindTest extends BuddySuite {
             
             var callNum:Int;
             var from:String;
+            var target:{a:String};
             before({
+                target = {a:null};
                 from = null;
                 callNum = 0;
             });
@@ -27,6 +29,7 @@ class ExprBindTest extends BuddySuite {
                 b.str = "b1";
                 inline function val() return b.str + "ab".charAt(a.str.length - 2) + Std.string(1);
                 
+                BindExt.exprTo(b.str + "ab".charAt(a.str.length - 2) + Std.string(1), target.a);
                 BindExt.expr(b.str + "ab".charAt(a.str.length - 2) + Std.string(1), function (f, to:String) {
                     f.should.be(from);
                     from = to;
@@ -34,14 +37,17 @@ class ExprBindTest extends BuddySuite {
                     callNum ++;
                 });
                 
+                target.a.should.be(val());
                 callNum.should.be(1);
                 
                 a.str = "a2";
                 
+                target.a.should.be(val());
                 callNum.should.be(2);
                 
                 b.str = "b2";
                 
+                target.a.should.be(val());
                 callNum.should.be(3);
             });
             
@@ -52,9 +58,11 @@ class ExprBindTest extends BuddySuite {
                 a.str = "a1";
                 b.str = "";
                 c.str = "1";
+                var target:{a:Null<Int>} = {a:null};
                 inline function val() return if (a.str.charAt(b.str.length) == Std.string(c.str)) 1 else 0;
                 var from:Null<Int> = null;
                 
+                BindExt.exprTo(if (a.str.charAt(b.str.length) == Std.string(c.str)) 1 else 0, target.a);
                 BindExt.expr(if (a.str.charAt(b.str.length) == Std.string(c.str)) 1 else 0, function (f:Null<Int>, to:Null<Int>) {
                     (f == from).should.be(true); // f.should.be(from); cast f to Int
                     from = to;
@@ -62,22 +70,27 @@ class ExprBindTest extends BuddySuite {
                     callNum ++;
                 });
                 
+                target.a.should.be(val());
                 callNum.should.be(1);
                 
                 b.str = "1";
                 
+                target.a.should.be(val());
                 callNum.should.be(2);
                 
                 b.str = "";
                 
+                target.a.should.be(val());
                 callNum.should.be(3);
                 
                 a.str = "b2";
                 
+                target.a.should.be(val());
                 callNum.should.be(4);
                 
                 c.str = "b";
                 
+                target.a.should.be(val());
                 callNum.should.be(5);
             });