diff --git a/Cargo.lock b/Cargo.lock
index 66a881ad374878..dced049465740e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2177,6 +2177,8 @@ version = "0.0.0"
 dependencies = [
  "drop_bomb",
  "insta",
+ "ruff_cache",
+ "ruff_macros",
  "ruff_text_size",
  "rustc-hash",
  "schemars",
@@ -2335,7 +2337,9 @@ dependencies = [
  "itertools 0.11.0",
  "memchr",
  "once_cell",
+ "ruff_cache",
  "ruff_formatter",
+ "ruff_macros",
  "ruff_python_ast",
  "ruff_python_index",
  "ruff_python_parser",
@@ -2527,8 +2531,10 @@ dependencies = [
  "pep440_rs",
  "regex",
  "ruff_cache",
+ "ruff_formatter",
  "ruff_linter",
  "ruff_macros",
+ "ruff_python_formatter",
  "rustc-hash",
  "schemars",
  "serde",
diff --git a/crates/ruff_cache/src/cache_key.rs b/crates/ruff_cache/src/cache_key.rs
index c62e580d1e2b34..6140792f143ec4 100644
--- a/crates/ruff_cache/src/cache_key.rs
+++ b/crates/ruff_cache/src/cache_key.rs
@@ -2,7 +2,10 @@ use std::borrow::Cow;
 use std::collections::hash_map::DefaultHasher;
 use std::collections::{BTreeMap, BTreeSet, HashMap, HashSet};
 use std::hash::{Hash, Hasher};
-use std::num::NonZeroU8;
+use std::num::{
+    NonZeroI128, NonZeroI16, NonZeroI32, NonZeroI64, NonZeroI8, NonZeroU128, NonZeroU16,
+    NonZeroU32, NonZeroU64, NonZeroU8,
+};
 use std::ops::{Deref, DerefMut};
 use std::path::{Path, PathBuf};
 
@@ -205,14 +208,29 @@ impl CacheKey for i8 {
         state.write_i8(*self);
     }
 }
-
-impl CacheKey for NonZeroU8 {
-    #[inline]
-    fn cache_key(&self, state: &mut CacheKeyHasher) {
-        state.write_u8(self.get());
-    }
+macro_rules! impl_cache_key_non_zero {
+    ($name:ident) => {
+        impl CacheKey for $name {
+            #[inline]
+            fn cache_key(&self, state: &mut CacheKeyHasher) {
+                self.get().cache_key(state)
+            }
+        }
+    };
 }
 
+impl_cache_key_non_zero!(NonZeroU8);
+impl_cache_key_non_zero!(NonZeroU16);
+impl_cache_key_non_zero!(NonZeroU32);
+impl_cache_key_non_zero!(NonZeroU64);
+impl_cache_key_non_zero!(NonZeroU128);
+
+impl_cache_key_non_zero!(NonZeroI8);
+impl_cache_key_non_zero!(NonZeroI16);
+impl_cache_key_non_zero!(NonZeroI32);
+impl_cache_key_non_zero!(NonZeroI64);
+impl_cache_key_non_zero!(NonZeroI128);
+
 macro_rules! impl_cache_key_tuple {
     () => (
         impl CacheKey for () {
diff --git a/crates/ruff_cli/src/commands/format.rs b/crates/ruff_cli/src/commands/format.rs
index f8277601eb3124..4d45d5a95cdd2f 100644
--- a/crates/ruff_cli/src/commands/format.rs
+++ b/crates/ruff_cli/src/commands/format.rs
@@ -1,6 +1,5 @@
 use std::fmt::{Display, Formatter};
 use std::io;
-use std::num::NonZeroU16;
 use std::path::{Path, PathBuf};
 use std::time::Instant;
 
@@ -10,12 +9,10 @@ use log::error;
 use rayon::iter::Either::{Left, Right};
 use rayon::iter::{IntoParallelIterator, ParallelIterator};
 use thiserror::Error;
-use tracing::{debug, warn};
+use tracing::debug;
 
-use ruff_formatter::LineWidth;
 use ruff_linter::fs;
 use ruff_linter::logging::LogLevel;
-use ruff_linter::settings::types::PreviewMode;
 use ruff_linter::warn_user_once;
 use ruff_python_ast::{PySourceType, SourceType};
 use ruff_python_formatter::{format_module, FormatModuleError, PyFormatOptions};
@@ -76,17 +73,7 @@ pub(crate) fn format(
                     };
 
                     let resolved_settings = resolver.resolve(path, &pyproject_config);
-
-                    // TODO(micha): Use `formatter` settings instead
-                    let preview = match resolved_settings.linter.preview {
-                        PreviewMode::Enabled => ruff_python_formatter::PreviewMode::Enabled,
-                        PreviewMode::Disabled => ruff_python_formatter::PreviewMode::Disabled,
-                    };
-                    let line_length = resolved_settings.linter.line_length;
-
-                    let options = PyFormatOptions::from_source_type(source_type)
-                        .with_line_width(LineWidth::from(NonZeroU16::from(line_length)))
-                        .with_preview(preview);
+                    let options = resolved_settings.formatter.to_format_options(source_type);
                     debug!("Formatting {} with {:?}", path.display(), options);
 
                     Some(match catch_unwind(|| format_path(path, options, mode)) {
diff --git a/crates/ruff_cli/src/commands/format_stdin.rs b/crates/ruff_cli/src/commands/format_stdin.rs
index e0ae8d9ba8128d..bcbf6342f32c93 100644
--- a/crates/ruff_cli/src/commands/format_stdin.rs
+++ b/crates/ruff_cli/src/commands/format_stdin.rs
@@ -1,12 +1,10 @@
 use std::io::{stdout, Write};
-use std::num::NonZeroU16;
 use std::path::Path;
 
 use anyhow::Result;
 use log::warn;
-use ruff_formatter::LineWidth;
-use ruff_linter::settings::types::PreviewMode;
 
+use ruff_python_ast::PySourceType;
 use ruff_python_formatter::{format_module, PyFormatOptions};
 use ruff_workspace::resolver::python_file_at_path;
 
@@ -39,18 +37,10 @@ pub(crate) fn format_stdin(cli: &FormatArguments, overrides: &Overrides) -> Resu
     // Format the file.
     let path = cli.stdin_filename.as_deref();
 
-    // TODO(micha): Use Formatter settings
-    let preview = match pyproject_config.settings.linter.preview {
-        PreviewMode::Enabled => ruff_python_formatter::PreviewMode::Enabled,
-        PreviewMode::Disabled => ruff_python_formatter::PreviewMode::Disabled,
-    };
-    let line_length = pyproject_config.settings.linter.line_length;
-
-    let options = path
-        .map(PyFormatOptions::from_extension)
-        .unwrap_or_default()
-        .with_line_width(LineWidth::from(NonZeroU16::from(line_length)))
-        .with_preview(preview);
+    let options = pyproject_config
+        .settings
+        .formatter
+        .to_format_options(path.map(PySourceType::from).unwrap_or_default());
 
     match format_source(path, options, mode) {
         Ok(result) => match mode {
diff --git a/crates/ruff_dev/src/format_dev.rs b/crates/ruff_dev/src/format_dev.rs
index 19ef98200d54de..3c4c4cf3c0801a 100644
--- a/crates/ruff_dev/src/format_dev.rs
+++ b/crates/ruff_dev/src/format_dev.rs
@@ -18,7 +18,6 @@ use imara_diff::{diff, Algorithm};
 use indicatif::ProgressStyle;
 #[cfg_attr(feature = "singlethreaded", allow(unused_imports))]
 use rayon::iter::{IntoParallelIterator, ParallelIterator};
-use ruff_linter::line_width::LineLength;
 use serde::Deserialize;
 use similar::{ChangeTag, TextDiff};
 use tempfile::NamedTempFile;
@@ -551,10 +550,8 @@ fn format_dir_entry(
     let settings = resolver.resolve(&path, pyproject_config);
     // That's a bad way of doing this but it's not worth doing something better for format_dev
     // TODO(micha) use formatter settings instead
-    if settings.linter.line_length != LineLength::default() {
-        options = options.with_line_width(LineWidth::from(NonZeroU16::from(
-            settings.linter.line_length,
-        )));
+    if settings.formatter.line_width != LineWidth::default() {
+        options = options.with_line_width(settings.formatter.line_width);
     }
 
     // Handle panics (mostly in `debug_assert!`)
diff --git a/crates/ruff_formatter/Cargo.toml b/crates/ruff_formatter/Cargo.toml
index 88f5bbf892df46..8e8a4332941236 100644
--- a/crates/ruff_formatter/Cargo.toml
+++ b/crates/ruff_formatter/Cargo.toml
@@ -11,6 +11,8 @@ repository = { workspace = true }
 license = { workspace = true }
 
 [dependencies]
+ruff_cache = { path = "../ruff_cache" }
+ruff_macros = { path = "../ruff_macros" }
 ruff_text_size = { path = "../ruff_text_size" }
 
 drop_bomb = { version = "0.1.5" }
diff --git a/crates/ruff_formatter/src/lib.rs b/crates/ruff_formatter/src/lib.rs
index 3ef9b94e61de2b..63c4a5a6042a2c 100644
--- a/crates/ruff_formatter/src/lib.rs
+++ b/crates/ruff_formatter/src/lib.rs
@@ -51,9 +51,10 @@ pub use source_code::{SourceCode, SourceCodeSlice};
 pub use crate::diagnostics::{ActualStart, FormatError, InvalidDocumentError, PrintError};
 pub use format_element::{normalize_newlines, FormatElement, LINE_TERMINATORS};
 pub use group_id::GroupId;
+use ruff_macros::CacheKey;
 use ruff_text_size::{TextRange, TextSize};
 
-#[derive(Debug, Eq, PartialEq, Clone, Copy, Hash)]
+#[derive(Debug, Eq, PartialEq, Clone, Copy, Hash, CacheKey)]
 #[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
 #[cfg_attr(feature = "schemars", derive(schemars::JsonSchema))]
 #[derive(Default)]
@@ -116,8 +117,14 @@ impl TryFrom<u8> for IndentWidth {
     }
 }
 
+impl From<NonZeroU8> for IndentWidth {
+    fn from(value: NonZeroU8) -> Self {
+        Self(value)
+    }
+}
+
 /// The maximum visual width to which the formatter should try to limit a line.
-#[derive(Clone, Copy, Debug, Eq, PartialEq)]
+#[derive(Clone, Copy, Debug, Eq, PartialEq, CacheKey)]
 #[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
 #[cfg_attr(feature = "schemars", derive(schemars::JsonSchema))]
 pub struct LineWidth(NonZeroU16);
diff --git a/crates/ruff_formatter/src/printer/printer_options/mod.rs b/crates/ruff_formatter/src/printer/printer_options/mod.rs
index efbe850cbf22ef..e3fca43c2bee88 100644
--- a/crates/ruff_formatter/src/printer/printer_options/mod.rs
+++ b/crates/ruff_formatter/src/printer/printer_options/mod.rs
@@ -1,4 +1,5 @@
 use crate::{FormatOptions, IndentStyle, IndentWidth, LineWidth};
+use ruff_macros::CacheKey;
 
 /// Options that affect how the [`crate::Printer`] prints the format tokens
 #[derive(Clone, Debug, Eq, PartialEq, Default)]
@@ -120,7 +121,7 @@ impl SourceMapGeneration {
     }
 }
 
-#[derive(Copy, Clone, Debug, Eq, PartialEq, Default)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Default, CacheKey)]
 #[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
 pub enum LineEnding {
     ///  Line Feed only (\n), common on Linux and macOS as well as inside git repos
diff --git a/crates/ruff_python_formatter/Cargo.toml b/crates/ruff_python_formatter/Cargo.toml
index 8e7a3b55ad6484..639e350d1f6d3b 100644
--- a/crates/ruff_python_formatter/Cargo.toml
+++ b/crates/ruff_python_formatter/Cargo.toml
@@ -11,7 +11,9 @@ repository = { workspace = true }
 license = { workspace = true }
 
 [dependencies]
+ruff_cache = { path = "../ruff_cache" }
 ruff_formatter = { path = "../ruff_formatter" }
+ruff_macros = { path = "../ruff_macros" }
 ruff_python_trivia = { path = "../ruff_python_trivia" }
 ruff_source_file = { path = "../ruff_source_file" }
 ruff_python_ast = { path = "../ruff_python_ast" }
diff --git a/crates/ruff_python_formatter/src/lib.rs b/crates/ruff_python_formatter/src/lib.rs
index 5ba8e3dde02789..09d3a07d7858f4 100644
--- a/crates/ruff_python_formatter/src/lib.rs
+++ b/crates/ruff_python_formatter/src/lib.rs
@@ -17,6 +17,7 @@ use crate::comments::{
 pub use crate::context::PyFormatContext;
 pub use crate::options::{MagicTrailingComma, PreviewMode, PyFormatOptions, QuoteStyle};
 use crate::verbatim::suppressed_node;
+pub use settings::FormatterSettings;
 
 pub(crate) mod builders;
 pub mod cli;
@@ -29,6 +30,7 @@ mod options;
 pub(crate) mod other;
 pub(crate) mod pattern;
 mod prelude;
+mod settings;
 pub(crate) mod statement;
 pub(crate) mod type_param;
 mod verbatim;
diff --git a/crates/ruff_python_formatter/src/options.rs b/crates/ruff_python_formatter/src/options.rs
index 457b2f9884c4e3..064aeaaf1c8365 100644
--- a/crates/ruff_python_formatter/src/options.rs
+++ b/crates/ruff_python_formatter/src/options.rs
@@ -1,9 +1,12 @@
 use ruff_formatter::printer::{LineEnding, PrinterOptions, SourceMapGeneration};
 use ruff_formatter::{FormatOptions, IndentStyle, IndentWidth, LineWidth};
+use ruff_macros::CacheKey;
 use ruff_python_ast::PySourceType;
 use std::path::Path;
 use std::str::FromStr;
 
+/// Resolved options for formatting one individual file. This is different from [`FormatSettings`] which
+/// represents the formatting settings for multiple files (the whole project, a subdirectory, ...)
 #[derive(Clone, Debug)]
 #[cfg_attr(
     feature = "serde",
@@ -176,7 +179,7 @@ impl FormatOptions for PyFormatOptions {
     }
 }
 
-#[derive(Copy, Clone, Debug, Default, Eq, PartialEq)]
+#[derive(Copy, Clone, Debug, Default, Eq, PartialEq, CacheKey)]
 #[cfg_attr(
     feature = "serde",
     derive(serde::Serialize, serde::Deserialize),
@@ -230,7 +233,7 @@ impl FromStr for QuoteStyle {
     }
 }
 
-#[derive(Copy, Clone, Debug, Default)]
+#[derive(Copy, Clone, Debug, Default, CacheKey)]
 #[cfg_attr(
     feature = "serde",
     derive(serde::Serialize, serde::Deserialize),
@@ -261,7 +264,7 @@ impl FromStr for MagicTrailingComma {
     }
 }
 
-#[derive(Copy, Clone, Debug, Eq, PartialEq, Default)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Default, CacheKey)]
 #[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
 #[cfg_attr(feature = "serde", serde(rename_all = "lowercase"))]
 pub enum PreviewMode {
diff --git a/crates/ruff_python_formatter/src/settings.rs b/crates/ruff_python_formatter/src/settings.rs
new file mode 100644
index 00000000000000..4a9f42d20afe02
--- /dev/null
+++ b/crates/ruff_python_formatter/src/settings.rs
@@ -0,0 +1,49 @@
+use std::path::PathBuf;
+
+use ruff_formatter::{FormatOptions, IndentStyle, LineWidth};
+use ruff_macros::CacheKey;
+use ruff_python_ast::PySourceType;
+
+use crate::{MagicTrailingComma, PreviewMode, PyFormatOptions, QuoteStyle};
+
+#[derive(CacheKey, Clone, Debug)]
+pub struct FormatterSettings {
+    /// The files that are excluded from formatting (but may be linted).
+    pub exclude: Vec<PathBuf>,
+
+    pub preview: PreviewMode,
+
+    pub line_width: LineWidth,
+
+    pub indent_style: IndentStyle,
+
+    pub quote_style: QuoteStyle,
+
+    pub magic_trailing_comma: MagicTrailingComma,
+}
+
+impl FormatterSettings {
+    pub fn to_format_options(&self, source_type: PySourceType) -> PyFormatOptions {
+        PyFormatOptions::from_source_type(source_type)
+            .with_indent_style(self.indent_style)
+            .with_quote_style(self.quote_style)
+            .with_magic_trailing_comma(self.magic_trailing_comma)
+            .with_preview(self.preview)
+            .with_line_width(self.line_width)
+    }
+}
+
+impl Default for FormatterSettings {
+    fn default() -> Self {
+        let default_options = PyFormatOptions::default();
+
+        Self {
+            exclude: Vec::default(),
+            preview: PreviewMode::Disabled,
+            line_width: default_options.line_width(),
+            indent_style: default_options.indent_style(),
+            quote_style: default_options.quote_style(),
+            magic_trailing_comma: default_options.magic_trailing_comma(),
+        }
+    }
+}
diff --git a/crates/ruff_wasm/src/lib.rs b/crates/ruff_wasm/src/lib.rs
index feef6f7a49a576..088cb1273469a4 100644
--- a/crates/ruff_wasm/src/lib.rs
+++ b/crates/ruff_wasm/src/lib.rs
@@ -1,21 +1,20 @@
-use std::num::NonZeroU16;
 use std::path::Path;
 
 use js_sys::Error;
 use serde::{Deserialize, Serialize};
 use wasm_bindgen::prelude::*;
 
-use ruff_formatter::{FormatResult, Formatted, LineWidth};
+use ruff_formatter::{FormatResult, Formatted};
 use ruff_linter::directives;
 use ruff_linter::line_width::{LineLength, TabSize};
 use ruff_linter::linter::{check_path, LinterResult};
 use ruff_linter::registry::AsRule;
-use ruff_linter::settings::types::{PreviewMode, PythonVersion};
+use ruff_linter::settings::types::PythonVersion;
 use ruff_linter::settings::{flags, DUMMY_VARIABLE_RGX, PREFIXES};
 use ruff_linter::source_kind::SourceKind;
 use ruff_python_ast::{Mod, PySourceType};
 use ruff_python_codegen::Stylist;
-use ruff_python_formatter::{format_node, pretty_comments, PyFormatContext, PyFormatOptions};
+use ruff_python_formatter::{format_node, pretty_comments, PyFormatContext};
 use ruff_python_index::{CommentRangesBuilder, Indexer};
 use ruff_python_parser::lexer::LexResult;
 use ruff_python_parser::{parse_tokens, AsMode, Mode};
@@ -302,15 +301,9 @@ impl<'a> ParsedModule<'a> {
 
     fn format(&self, settings: &Settings) -> FormatResult<Formatted<PyFormatContext>> {
         // TODO(konstin): Add an options for py/pyi to the UI (2/2)
-        // TODO(micha): Use formatter settings instead
-        let options = PyFormatOptions::from_source_type(PySourceType::default())
-            .with_preview(match settings.linter.preview {
-                PreviewMode::Disabled => ruff_python_formatter::PreviewMode::Disabled,
-                PreviewMode::Enabled => ruff_python_formatter::PreviewMode::Enabled,
-            })
-            .with_line_width(LineWidth::from(NonZeroU16::from(
-                settings.linter.line_length,
-            )));
+        let options = settings
+            .formatter
+            .to_format_options(PySourceType::default());
 
         format_node(
             &self.module,
diff --git a/crates/ruff_workspace/Cargo.toml b/crates/ruff_workspace/Cargo.toml
index dd741254eb25ed..3be2dca20fbdbd 100644
--- a/crates/ruff_workspace/Cargo.toml
+++ b/crates/ruff_workspace/Cargo.toml
@@ -14,6 +14,8 @@ license = { workspace = true }
 
 [dependencies]
 ruff_linter = { path = "../ruff_linter" }
+ruff_formatter = { path = "../ruff_formatter" }
+ruff_python_formatter = { path = "../ruff_python_formatter" }
 ruff_cache = { path = "../ruff_cache" }
 ruff_macros = { path = "../ruff_macros" }
 
diff --git a/crates/ruff_workspace/src/configuration.rs b/crates/ruff_workspace/src/configuration.rs
index 3217f835b9cdbe..39d8be9cdf4199 100644
--- a/crates/ruff_workspace/src/configuration.rs
+++ b/crates/ruff_workspace/src/configuration.rs
@@ -4,21 +4,19 @@
 
 use std::borrow::Cow;
 use std::env::VarError;
+use std::num::NonZeroU16;
 use std::path::{Path, PathBuf};
 
-use crate::options::{
-    Flake8AnnotationsOptions, Flake8BanditOptions, Flake8BugbearOptions, Flake8BuiltinsOptions,
-    Flake8ComprehensionsOptions, Flake8CopyrightOptions, Flake8ErrMsgOptions, Flake8GetTextOptions,
-    Flake8ImplicitStrConcatOptions, Flake8ImportConventionsOptions, Flake8PytestStyleOptions,
-    Flake8QuotesOptions, Flake8SelfOptions, Flake8TidyImportsOptions, Flake8TypeCheckingOptions,
-    Flake8UnusedArgumentsOptions, IsortOptions, McCabeOptions, Options, Pep8NamingOptions,
-    PyUpgradeOptions, PycodestyleOptions, PydocstyleOptions, PyflakesOptions, PylintOptions,
-};
-use crate::settings::{ResolverSettings, Settings, EXCLUDE, INCLUDE};
 use anyhow::{anyhow, Result};
 use glob::{glob, GlobError, Paths, PatternError};
 use regex::Regex;
+use rustc_hash::{FxHashMap, FxHashSet};
+use shellexpand;
+use shellexpand::LookupError;
+use strum::IntoEnumIterator;
+
 use ruff_cache::cache_dir;
+use ruff_formatter::{IndentStyle, LineWidth};
 use ruff_linter::line_width::{LineLength, TabSize};
 use ruff_linter::registry::RuleNamespace;
 use ruff_linter::registry::{Rule, RuleSet, INCOMPATIBLE_CODES};
@@ -34,10 +32,17 @@ use ruff_linter::settings::{
 use ruff_linter::{
     fs, warn_user, warn_user_once, warn_user_once_by_id, RuleSelector, RUFF_PKG_VERSION,
 };
-use rustc_hash::{FxHashMap, FxHashSet};
-use shellexpand;
-use shellexpand::LookupError;
-use strum::IntoEnumIterator;
+use ruff_python_formatter::{FormatterSettings, MagicTrailingComma, QuoteStyle};
+
+use crate::options::{
+    Flake8AnnotationsOptions, Flake8BanditOptions, Flake8BugbearOptions, Flake8BuiltinsOptions,
+    Flake8ComprehensionsOptions, Flake8CopyrightOptions, Flake8ErrMsgOptions, Flake8GetTextOptions,
+    Flake8ImplicitStrConcatOptions, Flake8ImportConventionsOptions, Flake8PytestStyleOptions,
+    Flake8QuotesOptions, Flake8SelfOptions, Flake8TidyImportsOptions, Flake8TypeCheckingOptions,
+    Flake8UnusedArgumentsOptions, IsortOptions, McCabeOptions, Options, Pep8NamingOptions,
+    PyUpgradeOptions, PycodestyleOptions, PydocstyleOptions, PyflakesOptions, PylintOptions,
+};
+use crate::settings::{ResolverSettings, Settings, EXCLUDE, INCLUDE};
 
 #[derive(Debug, Default)]
 pub struct RuleSelection {
@@ -149,6 +154,7 @@ impl Configuration {
                 respect_gitignore: self.respect_gitignore.unwrap_or(true),
                 project_root: project_root.to_path_buf(),
             },
+
             linter: LinterSettings {
                 target_version,
                 project_root: project_root.to_path_buf(),
@@ -283,6 +289,21 @@ impl Configuration {
                     .map(PyUpgradeOptions::into_settings)
                     .unwrap_or_default(),
             },
+
+            formatter: FormatterSettings {
+                exclude: vec![],
+                preview: self
+                    .preview
+                    .map(|preview| match preview {
+                        PreviewMode::Disabled => ruff_python_formatter::PreviewMode::Disabled,
+                        PreviewMode::Enabled => ruff_python_formatter::PreviewMode::Enabled,
+                    })
+                    .unwrap_or_default(),
+                line_width: LineWidth::from(NonZeroU16::from(self.line_length.unwrap_or_default())),
+                indent_style: IndentStyle::default(),
+                quote_style: QuoteStyle::default(),
+                magic_trailing_comma: MagicTrailingComma::default(),
+            },
         })
     }
 
@@ -805,12 +826,13 @@ pub fn resolve_src(src: &[String], project_root: &Path) -> Result<Vec<PathBuf>>
 
 #[cfg(test)]
 mod tests {
-    use crate::configuration::{Configuration, RuleSelection};
     use ruff_linter::codes::{Flake8Copyright, Pycodestyle, Refurb};
     use ruff_linter::registry::{Linter, Rule, RuleSet};
     use ruff_linter::settings::types::PreviewMode;
     use ruff_linter::RuleSelector;
 
+    use crate::configuration::{Configuration, RuleSelection};
+
     const NURSERY_RULES: &[Rule] = &[
         Rule::MissingCopyrightNotice,
         Rule::IndentationWithInvalidMultiple,
diff --git a/crates/ruff_workspace/src/settings.rs b/crates/ruff_workspace/src/settings.rs
index be2e56d698dc5c..24daee6fcdc17c 100644
--- a/crates/ruff_workspace/src/settings.rs
+++ b/crates/ruff_workspace/src/settings.rs
@@ -3,6 +3,7 @@ use ruff_cache::cache_dir;
 use ruff_linter::settings::types::{FilePattern, FilePatternSet, SerializationFormat};
 use ruff_linter::settings::LinterSettings;
 use ruff_macros::CacheKey;
+use ruff_python_formatter::FormatterSettings;
 use std::path::{Path, PathBuf};
 
 #[derive(Debug, CacheKey)]
@@ -23,6 +24,7 @@ pub struct Settings {
 
     pub resolver: ResolverSettings,
     pub linter: LinterSettings,
+    pub formatter: FormatterSettings,
 }
 
 impl Default for Settings {
@@ -37,6 +39,7 @@ impl Default for Settings {
             show_source: false,
             linter: LinterSettings::new(project_root),
             resolver: ResolverSettings::new(project_root),
+            formatter: FormatterSettings::default(),
         }
     }
 }