diff --git a/compile.rkt b/compile.rkt
index 1c24e7f..e480661 100644
--- a/compile.rkt
+++ b/compile.rkt
@@ -4,9 +4,7 @@
          "lexical-structs.rkt"
          "il-structs.rkt"
          "lexical-env.rkt"
-         "helpers.rkt"
          "find-toplevel-variables.rkt"
-         "sets.rkt"
          racket/list)
 
 (provide (rename-out [-compile compile])
diff --git a/il-structs.rkt b/il-structs.rkt
index 3e5f778..f749922 100644
--- a/il-structs.rkt
+++ b/il-structs.rkt
@@ -50,11 +50,6 @@
 
 
 
-;; An environment reference is either lexical or referring to a whole prefix.
-(define-type EnvReference (U EnvLexicalReference
-                             EnvWholePrefixReference))
-
-
 
 ;; instruction sequences
 (define-type UnlabeledStatement (U 
diff --git a/lexical-env.rkt b/lexical-env.rkt
index a54516c..7f926ea 100644
--- a/lexical-env.rkt
+++ b/lexical-env.rkt
@@ -1,7 +1,6 @@
 #lang typed/racket/base
 
 (require racket/list
-         "il-structs.rkt"
          "lexical-structs.rkt"
          "sets.rkt")
 (provide find-variable 
diff --git a/lexical-structs.rkt b/lexical-structs.rkt
index e3fde45..758fb5e 100644
--- a/lexical-structs.rkt
+++ b/lexical-structs.rkt
@@ -35,6 +35,7 @@
 (define-struct: EnvLexicalReference ([depth : Natural]
                                      [unbox? : Boolean])
   #:transparent)
+
 (define-struct: EnvPrefixReference ([depth : Natural]
                                     [pos : Natural]
                                     [name : Symbol])
@@ -42,3 +43,8 @@
 
 (define-struct: EnvWholePrefixReference ([depth : Natural])
   #:transparent)
+
+
+;; An environment reference is either lexical or referring to a whole prefix.
+(define-type EnvReference (U EnvLexicalReference
+                             EnvWholePrefixReference))
\ No newline at end of file
diff --git a/test-assemble.rkt b/test-assemble.rkt
index 24ebc68..4154e82 100644
--- a/test-assemble.rkt
+++ b/test-assemble.rkt
@@ -2,10 +2,8 @@
 
 (require "assemble.rkt"
          "browser-evaluate.rkt"
-         "parse.rkt"
          "lexical-structs.rkt"
          "il-structs.rkt"
-         "compile.rkt"
          racket/port
          racket/promise
          racket/runtime-path)