diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 661710b..fe252f6 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -3,7 +3,7 @@ repos:
     rev: v0.23
     hooks:
       - id: validate-pyproject
-        additional_dependencies: ["validate-pyproject-schema-store[all]"]
+        additional_dependencies: ['validate-pyproject-schema-store[all]']
   - repo: https://github.com/tox-dev/pyproject-fmt
     rev: v2.5.0
     hooks:
diff --git a/src/usethis/_core/tool.py b/src/usethis/_core/tool.py
index 2a6986c..5513c67 100644
--- a/src/usethis/_core/tool.py
+++ b/src/usethis/_core/tool.py
@@ -7,14 +7,17 @@
 )
 from usethis._console import box_print
 from usethis._integrations.pre_commit.core import (
-    # add_pre_commit_config_file,
     install_pre_commit_hooks,
     remove_pre_commit_config,
     uninstall_pre_commit_hooks,
 )
 from usethis._integrations.pre_commit.hooks import add_placeholder_hook, get_hook_names
 from usethis._integrations.pytest.core import add_pytest_dir, remove_pytest_dir
-from usethis._integrations.ruff.rules import deselect_ruff_rules, select_ruff_rules
+from usethis._integrations.ruff.rules import (
+    deselect_ruff_rules,
+    ignore_ruff_rules,
+    select_ruff_rules,
+)
 from usethis._integrations.uv.deps import add_deps_to_group, remove_deps_from_group
 from usethis._tool import (
     ALL_TOOLS,
@@ -157,11 +160,13 @@ def use_ruff(*, remove: bool = False) -> None:
     for _tool in ALL_TOOLS:
         if _tool.is_used():
             rules += _tool.get_associated_ruff_rules()
+    ignored_rules = ["SIM108"]
 
     if not remove:
         add_deps_to_group(tool.dev_deps, "dev")
         tool.add_pyproject_configs()
         select_ruff_rules(rules)
+        ignore_ruff_rules(ignored_rules)
         if PreCommitTool().is_used():
             tool.add_pre_commit_repo_configs()
 
diff --git a/src/usethis/_integrations/ruff/rules.py b/src/usethis/_integrations/ruff/rules.py
index 0941cc0..caed5a7 100644
--- a/src/usethis/_integrations/ruff/rules.py
+++ b/src/usethis/_integrations/ruff/rules.py
@@ -20,6 +20,20 @@ def select_ruff_rules(rules: list[str]) -> None:
     append_config_list(["tool", "ruff", "lint", "select"], rules)
 
 
+def ignore_ruff_rules(rules: list[str]) -> None:
+    """Ignore ruff rules in the project."""
+    rules = sorted(set(rules) - set(get_ignored_ruff_rules()))
+
+    if not rules:
+        return
+
+    rules_str = ", ".join([f"'{rule}'" for rule in rules])
+    s = "" if len(rules) == 1 else "s"
+    tick_print(f"Ignoring ruff rule{s} {rules_str} in 'pyproject.toml'.")
+
+    append_config_list(["tool", "ruff", "lint", "ignore"], rules)
+
+
 def deselect_ruff_rules(rules: list[str]) -> None:
     """Ensure ruff rules are not selected in the project."""
 
@@ -44,3 +58,14 @@ def get_ruff_rules() -> list[str]:
         rules = []
 
     return rules
+
+
+def get_ignored_ruff_rules() -> list[str]:
+    """Get the ruff rules ignored in the project."""
+
+    try:
+        rules: list[str] = get_config_value(["tool", "ruff", "lint", "ignore"])
+    except KeyError:
+        rules = []
+
+    return rules
diff --git a/tests/usethis/_core/test_tool.py b/tests/usethis/_core/test_tool.py
index c1cffa4..22e61a7 100644
--- a/tests/usethis/_core/test_tool.py
+++ b/tests/usethis/_core/test_tool.py
@@ -786,6 +786,7 @@ def test_stdout(
                 "✔ Adding 'ruff' to the 'dev' dependency group.\n"
                 "✔ Adding ruff config to 'pyproject.toml'.\n"
                 "✔ Enabling ruff rules 'A', 'C4', 'E4', 'E7', 'E9', 'F', 'FURB', 'I', 'PLE', \n'PLR', 'RUF', 'SIM', 'UP' in 'pyproject.toml'.\n"
+                "✔ Ignoring ruff rule 'SIM108' in 'pyproject.toml'.\n"
                 "☐ Call the 'ruff check --fix' command to run the ruff linter with autofixes.\n"
                 "☐ Call the 'ruff format' command to run the ruff formatter.\n"
             )