diff --git a/test.ref b/test.ref
index dac0403..32a8366 100644
--- a/test.ref
+++ b/test.ref
@@ -12,7 +12,18 @@ Point.new(x: 3, y: 4) => <<Point>>
   |   y: 4
   |   x: 3
 twice 21 is 42
-double => <closure>
+double => <<Closure>>
+  |   environment: nil
+  |   function: <<Lambda>>
+  |   |   body: <<Object>>
+  |   |   |   0: <<Binop>>
+  |   |   |   |   operation: 13
+  |   |   |   |   0: <<GetVar>>
+  |   |   |   |   |   name: x
+  |   |   |   |   1: <<GetVar>>
+  |   |   |   |   |   name: x
+  |   |   parameters: <<Object>>
+  |   |   |   0: x
 Point.new(x:3, y:4).magnitude() => 5.000000
 <<?>>
   |   self: nil =>
@@ -50,7 +61,7 @@ ok
 ----
 MyType.__eval__() invoked
 42
-<closure>
+<<Closure>>
 ====
 42
 hello
@@ -130,7 +141,44 @@ f 102 ( 40 ) 41   32 { 123   32 p 112 r 114 i 105 n 110 t 116 ( 40 _ 95 _ 95 e 1
 42
 6 * 7
 MACRO table <<Object>>
-  |   test: <closure>
+  |   test: <<Closure>>
+  |   |   environment: nil
+  |   |   function: <<Lambda>>
+  |   |   |   body: <<Object>>
+  |   |   |   |   0: <<Call>>
+  |   |   |   |   |   arguments: <<Object>>
+  |   |   |   |   |   |   0: MACRO EVAL test with 
+  |   |   |   |   |   |   1: <<GetVar>>
+  |   |   |   |   |   |   |   name: x
+  |   |   |   |   |   |   2:  and 
+  |   |   |   |   |   |   3: <<GetVar>>
+  |   |   |   |   |   |   |   name: y
+  |   |   |   |   |   |   4: 
+
+  |   |   |   |   |   function: <<GetVar>>
+  |   |   |   |   |   |   name: print
+  |   |   |   |   1: <<Unyop>>
+  |   |   |   |   |   operation: 3
+  |   |   |   |   |   0: <<Block>>
+  |   |   |   |   |   |   body: <<Object>>
+  |   |   |   |   |   |   |   0: <<Call>>
+  |   |   |   |   |   |   |   |   arguments: <<Object>>
+  |   |   |   |   |   |   |   |   |   0: REPLACEMENT 
+  |   |   |   |   |   |   |   |   |   1: <<Unyop>>
+  |   |   |   |   |   |   |   |   |   |   operation: 4
+  |   |   |   |   |   |   |   |   |   |   0: <<GetVar>>
+  |   |   |   |   |   |   |   |   |   |   |   name: x
+  |   |   |   |   |   |   |   |   |   2: 
+
+  |   |   |   |   |   |   |   |   function: <<GetVar>>
+  |   |   |   |   |   |   |   |   |   name: print
+  |   |   |   |   |   |   |   1: <<Unyop>>
+  |   |   |   |   |   |   |   |   operation: 4
+  |   |   |   |   |   |   |   |   0: <<GetVar>>
+  |   |   |   |   |   |   |   |   |   name: y
+  |   |   |   parameters: <<Object>>
+  |   |   |   |   0: x
+  |   |   |   |   1: y
 define testfun
 MACRO EVAL test with 1 and 2
 MACRO EVAL test with three and four
@@ -142,6 +190,8 @@ REPLACEMENT three
 0 1 2 3 4 5 6 7 8 9 
 65 66 67 68 69 
 1 two 3 four 
+
+test.txt:331: *: illegal operand types Integer and String
 11: n * factorial(n - 1)
 10: if (n < 2) "1" else n * factorial(n - 1)
  9: factorial(n - 1)
diff --git a/test.txt b/test.txt
index 475bb5a..5419ceb 100644
--- a/test.txt
+++ b/test.txt
@@ -97,7 +97,7 @@ assert(x) {
   }
 }
 
-makeForm(assert);
+assert.fixed = #t; // do not evaluate arguments (x will be an AST suitable for eval())
 
 refute(x) {
   if (eval(x)) {
@@ -106,7 +106,9 @@ refute(x) {
   }
 }
 
-makeForm(refute);
+refute.fixed = #t;
+
+refute;
 
 assert(1 == 1);
 refute(1 == 0);