diff --git a/src/settings/defaults.rs b/src/settings/defaults.rs
new file mode 100644
index 0000000000..5ad16437cd
--- /dev/null
+++ b/src/settings/defaults.rs
@@ -0,0 +1,59 @@
+use path_absolutize::path_dedot;
+use regex::Regex;
+use rustc_hash::FxHashSet;
+
+use super::hashable::{HashableGlobSet, HashableHashSet};
+use super::types::PythonVersion;
+use super::Settings;
+use crate::registry::RuleCodePrefix;
+use crate::rules::{
+    flake8_annotations, flake8_bandit, flake8_bugbear, flake8_errmsg, flake8_import_conventions,
+    flake8_pytest_style, flake8_quotes, flake8_tidy_imports, flake8_unused_arguments, isort,
+    mccabe, pep8_naming, pycodestyle, pydocstyle, pyupgrade,
+};
+
+impl Default for Settings {
+    fn default() -> Self {
+        Self {
+            rules: [&RuleCodePrefix::E, &RuleCodePrefix::F]
+                .into_iter()
+                .flat_map(RuleCodePrefix::codes)
+                .into(),
+            allowed_confusables: FxHashSet::from_iter([]).into(),
+            builtins: vec![],
+            dummy_variable_rgx: Regex::new("^(_+|(_+[a-zA-Z0-9_]*[a-zA-Z0-9]+?))$")
+                .unwrap()
+                .into(),
+            exclude: HashableGlobSet::empty(),
+            extend_exclude: HashableGlobSet::empty(),
+            external: HashableHashSet::default(),
+            force_exclude: false,
+            ignore_init_module_imports: false,
+            line_length: 88,
+            namespace_packages: vec![],
+            per_file_ignores: vec![],
+            required_version: None,
+            respect_gitignore: true,
+            show_source: false,
+            src: vec![path_dedot::CWD.clone()],
+            target_version: PythonVersion::Py310,
+            task_tags: vec!["TODO".to_string(), "FIXME".to_string(), "XXX".to_string()],
+            typing_modules: vec![],
+            flake8_annotations: flake8_annotations::settings::Settings::default(),
+            flake8_bandit: flake8_bandit::settings::Settings::default(),
+            flake8_bugbear: flake8_bugbear::settings::Settings::default(),
+            flake8_errmsg: flake8_errmsg::settings::Settings::default(),
+            flake8_import_conventions: flake8_import_conventions::settings::Settings::default(),
+            flake8_pytest_style: flake8_pytest_style::settings::Settings::default(),
+            flake8_quotes: flake8_quotes::settings::Settings::default(),
+            flake8_tidy_imports: flake8_tidy_imports::Settings::default(),
+            flake8_unused_arguments: flake8_unused_arguments::settings::Settings::default(),
+            isort: isort::settings::Settings::default(),
+            mccabe: mccabe::settings::Settings::default(),
+            pep8_naming: pep8_naming::settings::Settings::default(),
+            pycodestyle: pycodestyle::settings::Settings::default(),
+            pydocstyle: pydocstyle::settings::Settings::default(),
+            pyupgrade: pyupgrade::settings::Settings::default(),
+        }
+    }
+}
diff --git a/src/settings/mod.rs b/src/settings/mod.rs
index ba2df1500d..c14668b947 100644
--- a/src/settings/mod.rs
+++ b/src/settings/mod.rs
@@ -10,8 +10,6 @@ use colored::Colorize;
 use globset::Glob;
 use itertools::Either::{Left, Right};
 use once_cell::sync::Lazy;
-#[cfg(test)]
-use path_absolutize::path_dedot;
 use regex::Regex;
 use rustc_hash::FxHashSet;
 
@@ -31,6 +29,7 @@ use crate::settings::types::{
 use crate::warn_user_once;
 
 pub mod configuration;
+mod defaults;
 pub mod flags;
 pub mod hashable;
 pub mod options;
@@ -237,41 +236,7 @@ impl Settings {
     pub fn for_rule(rule_code: RuleCode) -> Self {
         Self {
             rules: [rule_code].into(),
-            allowed_confusables: FxHashSet::from_iter([]).into(),
-            builtins: vec![],
-            dummy_variable_rgx: Regex::new("^(_+|(_+[a-zA-Z0-9_]*[a-zA-Z0-9]+?))$")
-                .unwrap()
-                .into(),
-            exclude: HashableGlobSet::empty(),
-            extend_exclude: HashableGlobSet::empty(),
-            external: HashableHashSet::default(),
-            force_exclude: false,
-            ignore_init_module_imports: false,
-            line_length: 88,
-            namespace_packages: vec![],
-            per_file_ignores: vec![],
-            required_version: None,
-            respect_gitignore: true,
-            show_source: false,
-            src: vec![path_dedot::CWD.clone()],
-            target_version: PythonVersion::Py310,
-            task_tags: vec!["TODO".to_string(), "FIXME".to_string(), "XXX".to_string()],
-            typing_modules: vec![],
-            flake8_annotations: flake8_annotations::settings::Settings::default(),
-            flake8_bandit: flake8_bandit::settings::Settings::default(),
-            flake8_bugbear: flake8_bugbear::settings::Settings::default(),
-            flake8_errmsg: flake8_errmsg::settings::Settings::default(),
-            flake8_import_conventions: flake8_import_conventions::settings::Settings::default(),
-            flake8_pytest_style: flake8_pytest_style::settings::Settings::default(),
-            flake8_quotes: flake8_quotes::settings::Settings::default(),
-            flake8_tidy_imports: flake8_tidy_imports::Settings::default(),
-            flake8_unused_arguments: flake8_unused_arguments::settings::Settings::default(),
-            isort: isort::settings::Settings::default(),
-            mccabe: mccabe::settings::Settings::default(),
-            pep8_naming: pep8_naming::settings::Settings::default(),
-            pycodestyle: pycodestyle::settings::Settings::default(),
-            pydocstyle: pydocstyle::settings::Settings::default(),
-            pyupgrade: pyupgrade::settings::Settings::default(),
+            ..Settings::default()
         }
     }
 
@@ -279,41 +244,7 @@ impl Settings {
     pub fn for_rules(rule_codes: Vec<RuleCode>) -> Self {
         Self {
             rules: rule_codes.into(),
-            allowed_confusables: HashableHashSet::default(),
-            builtins: vec![],
-            dummy_variable_rgx: Regex::new("^(_+|(_+[a-zA-Z0-9_]*[a-zA-Z0-9]+?))$")
-                .unwrap()
-                .into(),
-            exclude: HashableGlobSet::empty(),
-            extend_exclude: HashableGlobSet::empty(),
-            external: HashableHashSet::default(),
-            force_exclude: false,
-            ignore_init_module_imports: false,
-            line_length: 88,
-            namespace_packages: vec![],
-            per_file_ignores: vec![],
-            required_version: None,
-            respect_gitignore: true,
-            show_source: false,
-            src: vec![path_dedot::CWD.clone()],
-            target_version: PythonVersion::Py310,
-            task_tags: vec!["TODO".to_string(), "FIXME".to_string(), "XXX".to_string()],
-            typing_modules: vec![],
-            flake8_annotations: flake8_annotations::settings::Settings::default(),
-            flake8_bandit: flake8_bandit::settings::Settings::default(),
-            flake8_bugbear: flake8_bugbear::settings::Settings::default(),
-            flake8_errmsg: flake8_errmsg::settings::Settings::default(),
-            flake8_import_conventions: flake8_import_conventions::settings::Settings::default(),
-            flake8_pytest_style: flake8_pytest_style::settings::Settings::default(),
-            flake8_quotes: flake8_quotes::settings::Settings::default(),
-            flake8_tidy_imports: flake8_tidy_imports::Settings::default(),
-            flake8_unused_arguments: flake8_unused_arguments::settings::Settings::default(),
-            isort: isort::settings::Settings::default(),
-            mccabe: mccabe::settings::Settings::default(),
-            pep8_naming: pep8_naming::settings::Settings::default(),
-            pycodestyle: pycodestyle::settings::Settings::default(),
-            pydocstyle: pydocstyle::settings::Settings::default(),
-            pyupgrade: pyupgrade::settings::Settings::default(),
+            ..Settings::default()
         }
     }