diff --git a/src/builtin/functions/list.rs b/src/builtin/functions/list.rs
index 9dbb483..c0b8550 100644
--- a/src/builtin/functions/list.rs
+++ b/src/builtin/functions/list.rs
@@ -11,7 +11,7 @@ use crate::{
     value::{Number, Value},
 };
 
-fn length(mut args: CallArgs, parser: &mut Parser<'_>) -> SassResult<Value> {
+pub(crate) fn length(mut args: CallArgs, parser: &mut Parser<'_>) -> SassResult<Value> {
     args.max_args(1)?;
     Ok(Value::Dimension(
         Number::from(args.get_err(0, "list")?.as_list().len()),
@@ -20,7 +20,7 @@ fn length(mut args: CallArgs, parser: &mut Parser<'_>) -> SassResult<Value> {
     ))
 }
 
-fn nth(mut args: CallArgs, parser: &mut Parser<'_>) -> SassResult<Value> {
+pub(crate) fn nth(mut args: CallArgs, parser: &mut Parser<'_>) -> SassResult<Value> {
     args.max_args(2)?;
     let mut list = args.get_err(0, "list")?.as_list();
     let n = match args.get_err(1, "n")? {
@@ -61,7 +61,7 @@ fn nth(mut args: CallArgs, parser: &mut Parser<'_>) -> SassResult<Value> {
     }))
 }
 
-fn list_separator(mut args: CallArgs, parser: &mut Parser<'_>) -> SassResult<Value> {
+pub(crate) fn list_separator(mut args: CallArgs, parser: &mut Parser<'_>) -> SassResult<Value> {
     args.max_args(1)?;
     Ok(Value::String(
         match args.get_err(0, "list")? {
@@ -73,7 +73,7 @@ fn list_separator(mut args: CallArgs, parser: &mut Parser<'_>) -> SassResult<Val
     ))
 }
 
-fn set_nth(mut args: CallArgs, parser: &mut Parser<'_>) -> SassResult<Value> {
+pub(crate) fn set_nth(mut args: CallArgs, parser: &mut Parser<'_>) -> SassResult<Value> {
     args.max_args(3)?;
     let (mut list, sep, brackets) = match args.get_err(0, "list")? {
         Value::List(v, sep, b) => (v, sep, b),
@@ -120,7 +120,7 @@ fn set_nth(mut args: CallArgs, parser: &mut Parser<'_>) -> SassResult<Value> {
     Ok(Value::List(list, sep, brackets))
 }
 
-fn append(mut args: CallArgs, parser: &mut Parser<'_>) -> SassResult<Value> {
+pub(crate) fn append(mut args: CallArgs, parser: &mut Parser<'_>) -> SassResult<Value> {
     args.max_args(3)?;
     let (mut list, sep, brackets) = match args.get_err(0, "list")? {
         Value::List(v, sep, b) => (v, sep, b),
@@ -158,7 +158,7 @@ fn append(mut args: CallArgs, parser: &mut Parser<'_>) -> SassResult<Value> {
     Ok(Value::List(list, sep, brackets))
 }
 
-fn join(mut args: CallArgs, parser: &mut Parser<'_>) -> SassResult<Value> {
+pub(crate) fn join(mut args: CallArgs, parser: &mut Parser<'_>) -> SassResult<Value> {
     args.max_args(4)?;
     let (mut list1, sep1, brackets) = match args.get_err(0, "list1")? {
         Value::List(v, sep, brackets) => (v, sep, brackets),
@@ -225,7 +225,7 @@ fn join(mut args: CallArgs, parser: &mut Parser<'_>) -> SassResult<Value> {
     Ok(Value::List(list1, sep, brackets))
 }
 
-fn is_bracketed(mut args: CallArgs, parser: &mut Parser<'_>) -> SassResult<Value> {
+pub(crate) fn is_bracketed(mut args: CallArgs, parser: &mut Parser<'_>) -> SassResult<Value> {
     args.max_args(1)?;
     Ok(Value::bool(match args.get_err(0, "list")? {
         Value::List(.., brackets) => match brackets {
@@ -236,7 +236,7 @@ fn is_bracketed(mut args: CallArgs, parser: &mut Parser<'_>) -> SassResult<Value
     }))
 }
 
-fn index(mut args: CallArgs, parser: &mut Parser<'_>) -> SassResult<Value> {
+pub(crate) fn index(mut args: CallArgs, parser: &mut Parser<'_>) -> SassResult<Value> {
     args.max_args(2)?;
     let list = args.get_err(0, "list")?.as_list();
     let value = args.get_err(1, "value")?;
@@ -247,7 +247,7 @@ fn index(mut args: CallArgs, parser: &mut Parser<'_>) -> SassResult<Value> {
     Ok(Value::Dimension(index, Unit::None, true))
 }
 
-fn zip(args: CallArgs, parser: &mut Parser<'_>) -> SassResult<Value> {
+pub(crate) fn zip(args: CallArgs, parser: &mut Parser<'_>) -> SassResult<Value> {
     let lists = args
         .get_variadic()?
         .into_iter()
diff --git a/src/builtin/mod.rs b/src/builtin/mod.rs
index e1b3d41..ccef78d 100644
--- a/src/builtin/mod.rs
+++ b/src/builtin/mod.rs
@@ -1,4 +1,4 @@
 mod functions;
 pub(crate) mod modules;
 
-pub(crate) use functions::{math, meta, selector, Builtin, GLOBAL_FUNCTIONS};
+pub(crate) use functions::{list, math, meta, selector, Builtin, GLOBAL_FUNCTIONS};
diff --git a/src/builtin/modules/list.rs b/src/builtin/modules/list.rs
index 47d58dc..ddd6611 100644
--- a/src/builtin/modules/list.rs
+++ b/src/builtin/modules/list.rs
@@ -1,5 +1,22 @@
 use crate::{
-    args::CallArgs, builtin::modules::Module, error::SassResult, parse::Parser, value::Value,
+    args::CallArgs,
+    builtin::{
+        list::{append, index, is_bracketed, join, length, list_separator, nth, set_nth, zip},
+        modules::Module,
+    },
+    error::SassResult,
+    parse::Parser,
+    value::Value,
 };
 
-pub(crate) fn declare(_f: &mut Module) {}
+pub(crate) fn declare(f: &mut Module) {
+    f.insert_builtin("append", append);
+    f.insert_builtin("index", index);
+    f.insert_builtin("is-bracketed", is_bracketed);
+    f.insert_builtin("join", join);
+    f.insert_builtin("length", length);
+    f.insert_builtin("separator", list_separator);
+    f.insert_builtin("nth", nth);
+    f.insert_builtin("set-nth", set_nth);
+    f.insert_builtin("zip", zip);
+}