diff --git a/Spr24/HW/Homework3/test_parse.sml b/Spr24/HW/Homework3/test_parse.sml
index 9d69e50..4b9b36d 100644
--- a/Spr24/HW/Homework3/test_parse.sml
+++ b/Spr24/HW/Homework3/test_parse.sml
@@ -6,19 +6,19 @@ use "hw3_q3.sml";
         smlnj test_parse.sml
 *)
 
-exception TestFailure of string;
+let
+    exception TestFailure of string;
 
-local
-    fun sexp_to_string (ATOM(SYMBOL s)) = s
-    | sexp_to_string (ATOM NIL) = "NIL"
-    | sexp_to_string (CONS (x, y)) = "(" ^ sexp_to_string x ^ "." ^ sexp_to_string y ^ ")";
-in
-    fun assert_equal (expected, actual, msg) =
-        if expected = actual then ()
-        else raise TestFailure (msg ^ ": expected " ^ sexp_to_string expected ^ ", but got " ^ sexp_to_string actual);
-end;
+    local
+        fun sexp_to_string (ATOM(SYMBOL s)) = s
+        | sexp_to_string (ATOM NIL) = "NIL"
+        | sexp_to_string (CONS (x, y)) = "(" ^ sexp_to_string x ^ "." ^ sexp_to_string y ^ ")";
+    in
+        fun assert_equal (expected, actual, msg) =
+            if expected = actual then ()
+            else raise TestFailure (msg ^ ": expected " ^ sexp_to_string expected ^ ", but got " ^ sexp_to_string actual);
+    end;
 
-let
     fun run_tests tests =
         let
             fun runTest (name, test) =