diff --git a/Cargo.toml b/Cargo.toml
index 101970af8..df49e0e7e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2018"
 build = "build.rs"
 
 [dependencies]
-toddle = { path = "../toddle", default-features = false }
+toddle = { path = "../toddle", features = ["query"], default-features = false }
 tide = { path = "../tide" }
 byteorder = "1"
 smallvec = "1"
diff --git a/src/bin/main.rs b/src/bin/main.rs
index 8cb7c0554..11f308803 100644
--- a/src/bin/main.rs
+++ b/src/bin/main.rs
@@ -3,9 +3,9 @@ use std::io::BufWriter;
 use std::path::{Path, PathBuf};
 use futures_executor::block_on;
 
-use typstc::Typesetter;
-use typstc::toddle::query::FileSystemFontProvider;
-use typstc::export::pdf::PdfExporter;
+use typstc::{Typesetter, DynErrorProvider};
+use typstc::toddle::query::fs::EagerFsProvider;
+use typstc::export::pdf;
 
 
 fn main() {
@@ -37,15 +37,14 @@ fn run() -> Result<(), Box<dyn std::error::Error>> {
     let src = read_to_string(source)
         .map_err(|_| "failed to read from source file")?;
 
-    let mut typesetter = Typesetter::new();
-    let provider = FileSystemFontProvider::from_index("../fonts/index.json").unwrap();
-    typesetter.add_font_provider(provider);
+    let (fs, entries) = EagerFsProvider::from_index("../fonts", "index.json")?;
+    let provider = DynErrorProvider::new(fs);
+    let typesetter = Typesetter::new((Box::new(provider), entries));
 
     let layouts = block_on(typesetter.typeset(&src));
 
-    let exporter = PdfExporter::new();
     let writer = BufWriter::new(File::create(&dest)?);
-    exporter.export(&layouts, typesetter.loader(), writer)?;
+    pdf::export(&layouts, typesetter.loader(), writer)?;
 
     Ok(())
 }
diff --git a/src/export/pdf.rs b/src/export/pdf.rs
index 48aa2510c..f877d4584 100644
--- a/src/export/pdf.rs
+++ b/src/export/pdf.rs
@@ -11,45 +11,35 @@ use tide::font::{
     CMap, CMapEncoding, FontStream, GlyphUnit, WidthRecord,
 };
 
-use toddle::Error as FontError;
-use toddle::font::OwnedFont;
-use toddle::query::{SharedFontLoader, FontIndex};
+use toddle::{Font, OwnedFont, LoadError};
+use toddle::types::Tag;
+use toddle::query::FontIndex;
 use toddle::tables::{
     CharMap, Header, HorizontalMetrics, MacStyleFlags,
     Name, NameEntry, Post, OS2,
 };
 
+use crate::GlobalFontLoader;
 use crate::layout::{MultiLayout, Layout, LayoutAction};
 use crate::size::Size;
 
 
-/// Exports layouts into _PDFs_.
-pub struct PdfExporter {}
-
-impl PdfExporter {
-    /// Create a new exporter.
-    pub fn new() -> PdfExporter {
-        PdfExporter {}
-    }
-
-    /// Export a layouted list of boxes. The same font loader as used for
-    /// layouting needs to be passed in here since the layout only contains
-    /// indices referencing the loaded fonts. The raw PDF ist written into the
-    /// target writable, returning the number of bytes written.
-    pub fn export<W: Write>(
-        &self,
-        layout: &MultiLayout,
-        loader: &SharedFontLoader,
-        target: W,
-    ) -> PdfResult<usize> {
-        ExportProcess::new(layout, loader, target)?.write()
-    }
+/// Export a layouted list of boxes. The same font loader as used for
+/// layouting needs to be passed in here since the layout only contains
+/// indices referencing the loaded fonts. The raw PDF ist written into the
+/// target writable, returning the number of bytes written.
+pub fn export<W: Write>(
+    layout: &MultiLayout,
+    loader: &GlobalFontLoader,
+    target: W,
+) -> PdfResult<usize> {
+    PdfExporter::new(layout, loader, target)?.write()
 }
 
 /// The data relevant to the export of one document.
-struct ExportProcess<'d, W: Write> {
+struct PdfExporter<'a, W: Write> {
     writer: PdfWriter<W>,
-    layouts: &'d MultiLayout,
+    layouts: &'a MultiLayout,
 
     /// Since we cross-reference pages and fonts with their IDs already in the document
     /// catalog, we need to know exactly which ID is used for what from the beginning.
@@ -76,18 +66,18 @@ struct Offsets {
     fonts: (Ref, Ref),
 }
 
-impl<'d, W: Write> ExportProcess<'d, W> {
+impl<'a, W: Write> PdfExporter<'a, W> {
     /// Prepare the export. Only once [`ExportProcess::write`] is called the
     /// writing really happens.
     fn new(
-        layouts: &'d MultiLayout,
-        font_loader: &SharedFontLoader,
+        layouts: &'a MultiLayout,
+        font_loader: &GlobalFontLoader,
         target: W,
-    ) -> PdfResult<ExportProcess<'d, W>> {
+    ) -> PdfResult<PdfExporter<'a, W>> {
         let (fonts, font_remap) = Self::subset_fonts(layouts, font_loader)?;
         let offsets = Self::calculate_offsets(layouts.len(), fonts.len());
 
-        Ok(ExportProcess {
+        Ok(PdfExporter {
             writer: PdfWriter::new(target),
             layouts,
             offsets,
@@ -101,8 +91,8 @@ impl<'d, W: Write> ExportProcess<'d, W> {
     /// one used in the PDF. The new ones index into the returned vector of
     /// owned fonts.
     fn subset_fonts(
-        layouts: &'d MultiLayout,
-        font_loader: &SharedFontLoader
+        layouts: &'a MultiLayout,
+        font_loader: &GlobalFontLoader,
     ) -> PdfResult<(Vec<OwnedFont>, HashMap<FontIndex, usize>)> {
         let mut fonts = Vec::new();
         let mut font_chars: HashMap<FontIndex, HashSet<char>> = HashMap::new();
@@ -144,18 +134,22 @@ impl<'d, W: Write> ExportProcess<'d, W> {
         let mut font_loader = font_loader.borrow_mut();
 
         // All tables not listed here are dropped.
-        const SUBSET_TABLES: [&str; 13] = [
-            "name", "OS/2", "post", "head", "hhea", "hmtx", "maxp",
-            "cmap", "cvt ", "fpgm", "prep", "loca", "glyf",
-        ];
+        let tables: Vec<_> = [
+            b"name", b"OS/2", b"post", b"head", b"hhea", b"hmtx", b"maxp",
+            b"cmap", b"cvt ", b"fpgm", b"prep", b"loca", b"glyf",
+        ].iter().map(|&s| Tag(*s)).collect();
 
         // Do the subsetting.
         for index in 0 .. num_fonts {
             let old_index = new_to_old[&index];
             let font = font_loader.get_with_index(old_index);
-            let subsetted = font.subsetted(font_chars[&old_index].iter().cloned(), &SUBSET_TABLES)
-                .map(|bytes| OwnedFont::from_bytes(bytes))
-                .unwrap_or_else(|_| font.to_owned())?;
+
+            let chars = font_chars[&old_index].iter().cloned();
+            let subsetted = match font.subsetted(chars, tables.iter().copied()) {
+                Ok(data) => Font::from_bytes(data)?,
+                Err(_) => font.clone(),
+            };
+
             fonts.push(subsetted);
         }
 
@@ -302,7 +296,7 @@ impl<'d, W: Write> ExportProcess<'d, W> {
                 id,
                 Type0Font::new(
                     base_font.clone(),
-                    CMapEncoding::Predefined("Identity-H".to_owned()),
+                    CMapEncoding::Predefined("Identity-H".to_string()),
                     id + 1,
                 )
                 .to_unicode(id + 3),
@@ -409,7 +403,7 @@ fn ids((start, end): (Ref, Ref)) -> impl Iterator<Item = Ref> {
 /// The error type for _PDF_ exporting.
 pub enum PdfExportError {
     /// An error occured while subsetting the font for the _PDF_.
-    Font(FontError),
+    Font(LoadError),
     /// An I/O Error on the underlying writable.
     Io(io::Error),
 }
@@ -418,13 +412,13 @@ error_type! {
     self: PdfExportError,
     res: PdfResult,
     show: f => match self {
-        PdfExportError::Font(err) => write!(f, "font error: {}", err),
-        PdfExportError::Io(err) => write!(f, "io error: {}", err),
+        PdfExportError::Font(err) => err.fmt(f),
+        PdfExportError::Io(err) => err.fmt(f),
     },
     source: match self {
         PdfExportError::Font(err) => Some(err),
         PdfExportError::Io(err) => Some(err),
     },
     from: (err: io::Error, PdfExportError::Io(err)),
-    from: (err: FontError, PdfExportError::Font(err)),
+    from: (err: LoadError, PdfExportError::Font(err)),
 }
diff --git a/src/func.rs b/src/func.rs
index ce67034f2..63d7e8efe 100644
--- a/src/func.rs
+++ b/src/func.rs
@@ -145,15 +145,14 @@ macro_rules! function {
 
     (@layout($name:ident) layout($this:ident, $ctx:ident, $errors:ident) $code:block) => {
         impl $crate::syntax::Model for $name {
-            fn layout<'a, 'b, 'c, 't>(
+            fn layout<'a, 'b, 't>(
                 #[allow(unused)] &'a $this,
-                #[allow(unused)] mut $ctx: $crate::layout::LayoutContext<'b, 'c>,
+                #[allow(unused)] mut $ctx: $crate::layout::LayoutContext<'b>,
             ) -> $crate::layout::DynFuture<'t, $crate::layout::Layouted<
                 $crate::layout::Commands<'a>>
             > where
                 'a: 't,
                 'b: 't,
-                'c: 't,
                 Self: 't,
             {
                 Box::pin(async move {
diff --git a/src/layout/model.rs b/src/layout/model.rs
index 1d635f5c7..2eac9a8c9 100644
--- a/src/layout/model.rs
+++ b/src/layout/model.rs
@@ -5,8 +5,9 @@
 use std::future::Future;
 use std::pin::Pin;
 use smallvec::smallvec;
-use toddle::query::SharedFontLoader;
+use toddle::query::{SharedFontLoader, FontProvider};
 
+use crate::GlobalFontLoader;
 use crate::error::Errors;
 use crate::style::{LayoutStyle, PageStyle, TextStyle};
 use crate::size::{Size, Size2D};
@@ -18,8 +19,8 @@ use super::*;
 
 
 /// Performs the model layouting.
-pub struct ModelLayouter<'a, 'p> {
-    ctx: LayoutContext<'a, 'p>,
+pub struct ModelLayouter<'a> {
+    ctx: LayoutContext<'a>,
     layouter: LineLayouter,
     style: LayoutStyle,
     errors: Errors,
@@ -27,10 +28,10 @@ pub struct ModelLayouter<'a, 'p> {
 
 /// The context for layouting.
 #[derive(Debug, Clone)]
-pub struct LayoutContext<'a, 'p> {
+pub struct LayoutContext<'a> {
     /// The font loader to retrieve fonts from when typesetting text
     /// using [`layout_text`].
-    pub loader: &'a SharedFontLoader<'p>,
+    pub loader: &'a GlobalFontLoader,
     /// The style for pages and text.
     pub style: &'a LayoutStyle,
     /// The base unpadded dimensions of this container (for relative sizing).
@@ -105,7 +106,7 @@ pub enum Command<'a> {
 }
 
 /// Layout a syntax model into a list of boxes.
-pub async fn layout(model: &SyntaxModel, ctx: LayoutContext<'_, '_>) -> Layouted<MultiLayout> {
+pub async fn layout(model: &SyntaxModel, ctx: LayoutContext<'_>) -> Layouted<MultiLayout> {
     let mut layouter = ModelLayouter::new(ctx);
     layouter.layout_syntax_model(model).await;
     layouter.finish()
@@ -116,9 +117,9 @@ pub async fn layout(model: &SyntaxModel, ctx: LayoutContext<'_, '_>) -> Layouted
 /// work internally.
 pub type DynFuture<'a, T> = Pin<Box<dyn Future<Output=T> + 'a>>;
 
-impl<'a, 'p> ModelLayouter<'a, 'p> {
+impl<'a> ModelLayouter<'a> {
     /// Create a new model layouter.
-    pub fn new(ctx: LayoutContext<'a, 'p>) -> ModelLayouter<'a, 'p> {
+    pub fn new(ctx: LayoutContext<'a>) -> ModelLayouter<'a> {
         ModelLayouter {
             layouter: LineLayouter::new(LineContext {
                 spaces: ctx.spaces.clone(),
@@ -182,6 +183,7 @@ impl<'a, 'p> ModelLayouter<'a, 'p> {
                         Some("monospace") => { list.remove(0); },
                         _ => list.insert(0, "monospace".to_string()),
                     }
+                    self.style.text.fallback.flatten();
                 }
 
                 Node::Model(model) => {
diff --git a/src/layout/text.rs b/src/layout/text.rs
index a0f476431..6b512a07e 100644
--- a/src/layout/text.rs
+++ b/src/layout/text.rs
@@ -4,17 +4,18 @@
 //! When the primary layouting axis horizontally inversed, the word is spelled
 //! backwards. Vertical word layout is not yet supported.
 
-use toddle::query::{SharedFontLoader, FontQuery, FontIndex};
+use toddle::query::{FontQuery, FontIndex};
 use toddle::tables::{CharMap, Header, HorizontalMetrics};
 
+use crate::GlobalFontLoader;
 use crate::size::{Size, Size2D};
 use crate::style::TextStyle;
 use super::*;
 
 
 /// Performs the text layouting.
-struct TextLayouter<'a, 'p> {
-    ctx: TextContext<'a, 'p>,
+struct TextLayouter<'a> {
+    ctx: TextContext<'a>,
     text: &'a str,
     actions: LayoutActions,
     buffer: String,
@@ -24,10 +25,10 @@ struct TextLayouter<'a, 'p> {
 
 /// The context for text layouting.
 #[derive(Copy, Clone)]
-pub struct TextContext<'a, 'p> {
+pub struct TextContext<'a> {
     /// The font loader to retrieve fonts from when typesetting text
     /// using [`layout_text`].
-    pub loader: &'a SharedFontLoader<'p>,
+    pub loader: &'a GlobalFontLoader,
     /// The style for text: Font selection with classes, weights and variants,
     /// font sizes, spacing and so on.
     pub style: &'a TextStyle,
@@ -39,13 +40,13 @@ pub struct TextContext<'a, 'p> {
 }
 
 /// Layouts text into a box.
-pub async fn layout_text(text: &str, ctx: TextContext<'_, '_>) -> Layout {
+pub async fn layout_text(text: &str, ctx: TextContext<'_>) -> Layout {
     TextLayouter::new(text, ctx).layout().await
 }
 
-impl<'a, 'p> TextLayouter<'a, 'p> {
+impl<'a> TextLayouter<'a> {
     /// Create a new text layouter.
-    fn new(text: &'a str, ctx: TextContext<'a, 'p>) -> TextLayouter<'a, 'p> {
+    fn new(text: &'a str, ctx: TextContext<'a>) -> TextLayouter<'a> {
         TextLayouter {
             ctx,
             text,
diff --git a/src/lib.rs b/src/lib.rs
index a36b5cda5..07a60e356 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -21,8 +21,14 @@
 pub use toddle;
 
 use std::cell::RefCell;
+use std::error::Error;
+use std::fmt::{self, Debug, Formatter};
+use std::io::Cursor;
+use async_trait::async_trait;
 use smallvec::smallvec;
-use toddle::query::{FontLoader, FontProvider, SharedFontLoader};
+
+use toddle::{Font, OwnedData};
+use toddle::query::{FontLoader, FontProvider, SharedFontLoader, FontDescriptor};
 
 use crate::layout::{Layouted, MultiLayout};
 use crate::style::{LayoutStyle, PageStyle, TextStyle};
@@ -45,20 +51,29 @@ pub mod syntax;
 /// Transforms source code into typesetted layouts.
 ///
 /// A typesetter can be configured through various methods.
-pub struct Typesetter<'p> {
+pub struct Typesetter {
     /// The font loader shared by all typesetting processes.
-    loader: SharedFontLoader<'p>,
+    loader: GlobalFontLoader,
     /// The base layouting style.
     style: LayoutStyle,
     /// The standard library scope.
     scope: Scope,
 }
 
-impl<'p> Typesetter<'p> {
+/// The font loader type used in the [`Typesetter`].
+///
+/// This font loader is ref-cell protected and backed by a dynamic font
+/// provider.
+pub type GlobalFontLoader = SharedFontLoader<GlobalProvider>;
+
+/// The provider type of font loaders used in the [`Typesetter`].
+pub type GlobalProvider = Box<dyn FontProvider<Data=OwnedData, Error=Box<dyn Error>>>;
+
+impl Typesetter {
     /// Create a new typesetter.
-    pub fn new() -> Typesetter<'p> {
+    pub fn new(provider: (GlobalProvider, Vec<FontDescriptor>)) -> Typesetter {
         Typesetter {
-            loader: RefCell::new(FontLoader::new()),
+            loader: RefCell::new(FontLoader::new(provider)),
             style: LayoutStyle::default(),
             scope: Scope::with_std(),
         }
@@ -74,14 +89,8 @@ impl<'p> Typesetter<'p> {
         self.style.text = style;
     }
 
-    /// Add a font provider to the context of this typesetter.
-    pub fn add_font_provider<P: 'p>(&mut self, provider: P)
-    where P: FontProvider {
-        self.loader.get_mut().add_provider(provider);
-    }
-
     /// A reference to the backing font loader.
-    pub fn loader(&self) -> &SharedFontLoader<'p> {
+    pub fn loader(&self) -> &GlobalFontLoader {
         &self.loader
     }
 
@@ -121,3 +130,29 @@ impl<'p> Typesetter<'p> {
         self.layout(&tree).await.output
     }
 }
+
+/// Wraps a font provider and transforms its errors into boxed trait objects.
+/// This enables font providers that do not return boxed errors to be used with
+/// the typesetter.
+pub struct DynErrorProvider<P> {
+    provider: P,
+}
+
+impl<P> DynErrorProvider<P>
+where P: FontProvider, P::Error: Error + 'static {
+    /// Create a new dynamic error provider from any provider.
+    pub fn new(provider: P) -> DynErrorProvider<P> {
+        DynErrorProvider { provider }
+    }
+}
+
+#[async_trait(?Send)]
+impl<P> FontProvider for DynErrorProvider<P>
+where P: FontProvider, P::Error: Error + 'static {
+    type Data = P::Data;
+    type Error = Box<dyn Error>;
+
+    async fn load(&self, index: usize, variant: usize) -> Result<Font<P::Data>, Self::Error> {
+        Ok(self.provider.load(index, variant).await?)
+    }
+}
diff --git a/src/library/font.rs b/src/library/font.rs
index 07707e907..8e62563e8 100644
--- a/src/library/font.rs
+++ b/src/library/font.rs
@@ -20,7 +20,10 @@ function! {
 
     layout(self, ctx, errors) {
         styled(&self.body, ctx, Some(&self.list),
-            |s, l| s.fallback.list = l.clone())
+            |s, list| {
+                s.fallback.list = list.clone();
+                s.fallback.flatten();
+            })
     }
 }
 
diff --git a/src/library/mod.rs b/src/library/mod.rs
index 02311c0da..1a36fcc72 100644
--- a/src/library/mod.rs
+++ b/src/library/mod.rs
@@ -1,5 +1,6 @@
 //! The _Typst_ standard library.
 
+use toddle::query::FontProvider;
 use crate::syntax::Scope;
 use crate::func::prelude::*;
 
@@ -68,7 +69,7 @@ function! {
 /// Layout an optional body with a change of the text style.
 fn styled<'a, T, F>(
     body: &'a Option<SyntaxModel>,
-    ctx: LayoutContext,
+    ctx: LayoutContext<'_>,
     data: Option<T>,
     f: F,
 ) -> Commands<'a> where F: FnOnce(&mut TextStyle, T) {
diff --git a/src/style.rs b/src/style.rs
index 643dc03a1..e49e9680c 100644
--- a/src/style.rs
+++ b/src/style.rs
@@ -1,6 +1,7 @@
 //! Styles for text and pages.
 
-use toddle::query::{FontFallbackTree, FontVariant, FontStyle, FontWeight};
+use toddle::fallback;
+use toddle::query::{FallbackTree, FontVariant, FontStyle, FontWeight};
 use crate::size::{Size, Size2D, SizeBox, ValueBox, PSize};
 
 
@@ -17,7 +18,7 @@ pub struct LayoutStyle {
 #[derive(Debug, Clone)]
 pub struct TextStyle {
     /// A tree of font names and generic family names.
-    pub fallback: FontFallbackTree,
+    pub fallback: FallbackTree,
     /// The selected font variant.
     pub variant: FontVariant,
     /// Whether the bolder toggle is active or inactive. This determines
@@ -57,38 +58,19 @@ impl TextStyle {
     }
 }
 
-macro_rules! fallback {
-    (
-        list: ($($f:expr),*),
-        classes: { $($c:expr => ($($cf:expr),*),)* },
-        base: ($($b:expr),*),
-    ) => ({
-        let mut fallback = FontFallbackTree::new(
-            vec![$($f.to_string()),*],
-            vec![$($b.to_string()),*],
-        );
-        $(
-            fallback.set_class_list($c.to_string(), vec![$($cf.to_string()),*])
-                .expect("TextStyle::default: unexpected error \
-                         when setting class list");
-        )*
-        fallback
-    });
-}
-
 impl Default for TextStyle {
     fn default() -> TextStyle {
         TextStyle {
             fallback: fallback! {
-                list: ("sans-serif"),
+                list: ["sans-serif"],
                 classes: {
-                    "serif" => ("source serif pro", "noto serif"),
-                    "sans-serif" => ("source sans pro", "noto sans"),
-                    "monospace" => ("source code pro", "noto sans mono"),
-                    "math" => ("latin modern math", "serif"),
+                    "serif" => ["source serif pro", "noto serif"],
+                    "sans-serif" => ["source sans pro", "noto sans"],
+                    "monospace" => ["source code pro", "noto sans mono"],
+                    "math" => ["latin modern math", "serif"],
                 },
-                base: ("source sans pro", "noto sans",
-                       "noto emoji", "latin modern math"),
+                base: ["source sans pro", "noto sans",
+                       "noto emoji", "latin modern math"],
             },
             variant: FontVariant {
                 style: FontStyle::Normal,
@@ -157,7 +139,7 @@ pub struct Paper {
 
 impl Paper {
     /// The paper with the given name.
-    pub fn from_str(name: &str) -> Option<Paper> {
+    pub fn from_name(name: &str) -> Option<Paper> {
         parse_paper(name)
     }
 }
diff --git a/src/syntax/func/values.rs b/src/syntax/func/values.rs
index 515d6a43d..e4a0b2ad1 100644
--- a/src/syntax/func/values.rs
+++ b/src/syntax/func/values.rs
@@ -145,7 +145,7 @@ impl Value for FontStyle {
     type Output = Self;
 
     fn parse(expr: Spanned<Expr>) -> Result<Self::Output, Error> {
-        FontStyle::from_str(Ident::parse(expr)?.as_str())
+        FontStyle::from_name(Ident::parse(expr)?.as_str())
             .ok_or_else(|| err!("invalid font style"))
     }
 }
@@ -166,7 +166,7 @@ impl Value for FontWeight {
                 }
             }
             Expr::Ident(id) => {
-                FontWeight::from_str(id.as_str())
+                FontWeight::from_name(id.as_str())
                     .ok_or_else(|| err!("invalid font weight"))
                     .map(|weight| (weight, false))
             }
@@ -180,7 +180,7 @@ impl Value for Paper {
     type Output = Self;
 
     fn parse(expr: Spanned<Expr>) -> Result<Self::Output, Error> {
-        Paper::from_str(Ident::parse(expr)?.as_str())
+        Paper::from_name(Ident::parse(expr)?.as_str())
             .ok_or_else(|| err!("invalid paper type"))
     }
 }
diff --git a/src/syntax/mod.rs b/src/syntax/mod.rs
index 4430f6e8f..9d83e5468 100644
--- a/src/syntax/mod.rs
+++ b/src/syntax/mod.rs
@@ -23,7 +23,10 @@ pub_use_mod!(tokens);
 pub trait Model: Debug + ModelBounds {
     /// Layout the model into a sequence of commands processed by a
     /// [`ModelLayouter`](crate::layout::ModelLayouter).
-    async fn layout<'a>(&'a self, ctx: LayoutContext<'_, '_>) -> Layouted<Commands<'a>>;
+    async fn layout<'a>(
+        &'a self,
+        ctx: LayoutContext<'_>,
+    ) -> Layouted<Commands<'a>>;
 }
 
 /// A tree representation of source code.
@@ -47,7 +50,10 @@ impl SyntaxModel {
 
 #[async_trait(?Send)]
 impl Model for SyntaxModel {
-    async fn layout<'a>(&'a self, _: LayoutContext<'_, '_>) -> Layouted<Commands<'a>> {
+    async fn layout<'a>(
+        &'a self,
+        _: LayoutContext<'_>,
+    ) -> Layouted<Commands<'a>> {
         Layouted {
             output: vec![Command::LayoutSyntaxModel(self)],
             errors: vec![],
diff --git a/src/syntax/parsing.rs b/src/syntax/parsing.rs
index 9d128a46e..1e8cc74f0 100644
--- a/src/syntax/parsing.rs
+++ b/src/syntax/parsing.rs
@@ -81,7 +81,7 @@ pub fn parse(start: Position, src: &str, ctx: ParseContext) -> Parsed<SyntaxMode
             Token::Star       => Node::ToggleBolder,
             Token::Underscore => Node::ToggleItalic,
             Token::Backtick   => Node::ToggleMonospace,
-            Token::Text(text) => Node::Text(text.to_owned()),
+            Token::Text(text) => Node::Text(text.to_string()),
 
             Token::LineComment(_) | Token::BlockComment(_) => continue,
 
diff --git a/src/syntax/scope.rs b/src/syntax/scope.rs
index 895ee4982..a6d27c1ec 100644
--- a/src/syntax/scope.rs
+++ b/src/syntax/scope.rs
@@ -43,7 +43,7 @@ impl Scope {
     pub fn add_with_meta<F>(&mut self, name: &str, metadata: <F as ParseFunc>::Meta)
     where F: ParseFunc + Model + 'static {
         self.parsers.insert(
-            name.to_owned(),
+            name.to_string(),
             parser::<F>(metadata),
         );
     }
diff --git a/tests/src/layouter.rs b/tests/src/layouter.rs
index 95eea204d..ab95224cf 100644
--- a/tests/src/layouter.rs
+++ b/tests/src/layouter.rs
@@ -8,12 +8,12 @@ use std::process::Command;
 
 use futures_executor::block_on;
 
-use typstc::Typesetter;
+use typstc::{Typesetter, DynErrorProvider};
 use typstc::layout::{MultiLayout, Serialize};
 use typstc::size::{Size, Size2D, ValueBox};
 use typstc::style::{PageStyle, PaperClass};
-use typstc::toddle::query::FileSystemFontProvider;
-use typstc::export::pdf::PdfExporter;
+use typstc::export::pdf;
+use typstc::toddle::query::fs::EagerFsProvider;
 
 
 type DynResult<T> = Result<T, Box<dyn Error>>;
@@ -66,17 +66,17 @@ fn main() -> DynResult<()> {
 fn test(name: &str, src: &str) -> DynResult<()> {
     println!("Testing: {}.", name);
 
-    let mut typesetter = Typesetter::new();
+    let (fs, entries) = EagerFsProvider::from_index("../fonts", "index.json")?;
+    let paths = fs.paths();
+    let provider = DynErrorProvider::new(fs);
+    let mut typesetter = Typesetter::new((Box::new(provider), entries));
+
     typesetter.set_page_style(PageStyle {
         class: PaperClass::Custom,
         dimensions: Size2D::with_all(Size::pt(250.0)),
         margins: ValueBox::with_all(None),
     });
 
-    let provider = FileSystemFontProvider::from_index("../fonts/index.json")?;
-    let font_paths = provider.paths();
-    typesetter.add_font_provider(provider);
-
     let layouts = compile(&typesetter, src);
 
     // Compute the font's paths.
@@ -84,10 +84,8 @@ fn test(name: &str, src: &str) -> DynResult<()> {
     let loader = typesetter.loader().borrow();
     for layout in &layouts {
         for index in layout.find_used_fonts() {
-            fonts.entry(index).or_insert_with(|| {
-                let p = loader.get_provider_and_index(index.id).1;
-                &font_paths[p][index.variant]
-            });
+            fonts.entry(index)
+                .or_insert_with(|| &paths[index.id][index.variant]);
         }
     }
     drop(loader);
@@ -113,8 +111,7 @@ fn test(name: &str, src: &str) -> DynResult<()> {
     // Write the PDF file.
     let path = format!("tests/cache/pdf/{}.pdf", name);
     let file = BufWriter::new(File::create(path)?);
-    let exporter = PdfExporter::new();
-    exporter.export(&layouts, typesetter.loader(), file)?;
+    pdf::export(&layouts, typesetter.loader(), file)?;
 
     Ok(())
 }