diff --git a/crates/syntest/src/constants.rs b/crates/syntest/src/constants.rs
new file mode 100644
index 0000000..b43105d
--- /dev/null
+++ b/crates/syntest/src/constants.rs
@@ -0,0 +1,24 @@
+use std::rc::Rc;
+
+/// Helper functions for macros
+#[derive(Debug)]
+pub struct Const {
+    file: Rc<syn::File>,
+}
+
+impl Const {
+    pub fn new(file: Rc<syn::File>) -> Self {
+        Self { file }
+    }
+
+    pub fn constants(&self) -> Vec<syn::ItemConst> {
+        self.file
+            .items
+            .iter()
+            .filter_map(|item| match item {
+                syn::Item::Const(item) => Some(item.clone()),
+                _ => None,
+            })
+            .collect()
+    }
+}
diff --git a/crates/syntest/src/lib.rs b/crates/syntest/src/lib.rs
index f655454..fea893d 100644
--- a/crates/syntest/src/lib.rs
+++ b/crates/syntest/src/lib.rs
@@ -1,9 +1,13 @@
+mod constants;
 mod func;
 mod mac;
 mod mutation;
+mod syn;
 mod syntest;
 mod var;
 
+pub use constants::Const;
 pub use mutation::Mutation;
+pub use syn::*;
 pub use syntest::Syntest;
 pub use var::{LocalVariable, Value};
diff --git a/crates/syntest/src/syn.rs b/crates/syntest/src/syn.rs
new file mode 100644
index 0000000..85b8e4f
--- /dev/null
+++ b/crates/syntest/src/syn.rs
@@ -0,0 +1,2 @@
+pub use syn::parse_quote;
+pub use syn::Type;
diff --git a/crates/syntest/src/syntest.rs b/crates/syntest/src/syntest.rs
index 5eded22..dfd71cd 100644
--- a/crates/syntest/src/syntest.rs
+++ b/crates/syntest/src/syntest.rs
@@ -5,11 +5,12 @@ use syn::{
     parse_file, punctuated::Punctuated, token::PathSep, BinOp, Expr, Lit, Pat, PathSegment, Stmt,
 };
 
-use crate::{func::Func, mac::Mac, var::LocalVariable, Value};
+use crate::{constants::Const, func::Func, mac::Mac, var::LocalVariable, Value};
 
 pub struct Syntest {
-    pub file: Rc<syn::File>,
     pub mac: Mac,
+    pub constant: Const,
+    pub file: Rc<syn::File>,
 }
 
 impl Syntest {
@@ -18,6 +19,7 @@ impl Syntest {
 
         Ok(Self {
             mac: Mac::new(Rc::clone(&file)),
+            constant: Const::new(Rc::clone(&file)),
             file,
         })
     }
@@ -27,6 +29,7 @@ impl Syntest {
 
         Ok(Self {
             mac: Mac::new(Rc::clone(&file)),
+            constant: Const::new(Rc::clone(&file)),
             file: Rc::new(parse_file(code)?),
         })
     }