diff --git a/tapl/lam-testing.rkt b/tapl/lam-testing.rkt
new file mode 100644
index 0000000..2be3869
--- /dev/null
+++ b/tapl/lam-testing.rkt
@@ -0,0 +1,22 @@
+#lang racket
+(require (for-syntax syntax/parse))
+(require (for-meta 2 racket/base))
+(provide #%module-begin #%top-interaction #%app #%datum)
+(provide (rename-out [lam/tc λ]))
+
+(define-syntax (lam/tc stx)
+  (syntax-parse stx
+    [(_ (x y) e)
+     #:with
+     (lam xs (lr bs1 vs1 (lr2 bs2 vs2 e+)))
+     (local-expand
+      #'(λ (x y)
+          (let-syntax
+;              ([x (λ (sx) (syntax-parse sx [z:id (syntax-property #'y 'type 100)]))])
+              ([x (make-rename-transformer (syntax-property #'x 'type 100))])
+            e))
+      'expression
+      null)
+     #:when (printf "~a\n" #'e+)
+     #:when (printf "~a\n" (syntax-property #'e+ 'type))
+     #'(λ xs e+)]))
\ No newline at end of file
diff --git a/tapl/stlc-tests.rkt b/tapl/stlc-tests.rkt
deleted file mode 100644
index 5bc0523..0000000
--- a/tapl/stlc-tests.rkt
+++ /dev/null
@@ -1 +0,0 @@
-#lang s-exp "stlc.rkt"
\ No newline at end of file