diff --git a/scripts/_utils.py b/scripts/_utils.py
index 623eaca9f7..f9a4cd27dc 100644
--- a/scripts/_utils.py
+++ b/scripts/_utils.py
@@ -1,4 +1,5 @@
 import os
+import re
 from pathlib import Path
 
 ROOT_DIR = Path(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
@@ -11,3 +12,7 @@ def dir_name(origin: str) -> str:
 def pascal_case(origin: str) -> str:
     """Convert from snake-case to PascalCase."""
     return "".join(word.title() for word in origin.split("-"))
+
+
+def get_indent(line: str) -> str:
+    return re.match(r"^\s*", line).group()  # pyright: ignore[reportOptionalMemberAccess]
diff --git a/scripts/add_plugin.py b/scripts/add_plugin.py
index 3fac8231e0..80158415b5 100755
--- a/scripts/add_plugin.py
+++ b/scripts/add_plugin.py
@@ -11,7 +11,7 @@ Example usage:
 import argparse
 import os
 
-from _utils import ROOT_DIR, dir_name, pascal_case
+from _utils import ROOT_DIR, dir_name, get_indent, pascal_case
 
 
 def main(*, plugin: str, url: str) -> None:
@@ -67,23 +67,21 @@ mod tests {
 
     with open(ROOT_DIR / "src/registry.rs", "w") as fp:
         for line in content.splitlines():
+            indent = get_indent(line)
+
             if line.strip() == "// Ruff":
-                indent = line.split("// Ruff")[0]
                 fp.write(f"{indent}// {plugin}")
                 fp.write("\n")
 
             elif line.strip() == "Ruff,":
-                indent = line.split("Ruff,")[0]
                 fp.write(f"{indent}{pascal_case(plugin)},")
                 fp.write("\n")
 
             elif line.strip() == 'RuleOrigin::Ruff => "Ruff-specific rules",':
-                indent = line.split('RuleOrigin::Ruff => "Ruff-specific rules",')[0]
                 fp.write(f'{indent}RuleOrigin::{pascal_case(plugin)} => "{plugin}",')
                 fp.write("\n")
 
             elif line.strip() == "RuleOrigin::Ruff => vec![RuleCodePrefix::RUF],":
-                indent = line.split("RuleOrigin::Ruff => vec![RuleCodePrefix::RUF],")[0]
                 fp.write(
                     f"{indent}RuleOrigin::{pascal_case(plugin)} => vec![\n"
                     f'{indent}    todo!("Fill-in prefix after generating codes")\n'
@@ -92,7 +90,6 @@ mod tests {
                 fp.write("\n")
 
             elif line.strip() == "RuleOrigin::Ruff => None,":
-                indent = line.split("RuleOrigin::Ruff => None,")[0]
                 fp.write(f"{indent}RuleOrigin::{pascal_case(plugin)} => " f'Some(("{url}", &Platform::PyPI)),')
                 fp.write("\n")
 
@@ -105,7 +102,7 @@ mod tests {
     with open(ROOT_DIR / "src/violations.rs", "w") as fp:
         for line in content.splitlines():
             if line.strip() == "// Ruff":
-                indent = line.split("// Ruff")[0]
+                indent = get_indent(line)
                 fp.write(f"{indent}// {plugin}")
                 fp.write("\n")
 
diff --git a/scripts/add_rule.py b/scripts/add_rule.py
index 988d4934a1..d61a249b38 100755
--- a/scripts/add_rule.py
+++ b/scripts/add_rule.py
@@ -11,7 +11,7 @@ Example usage:
 
 import argparse
 
-from _utils import ROOT_DIR, dir_name
+from _utils import ROOT_DIR, dir_name, get_indent
 
 
 def snake_case(name: str) -> str:
@@ -34,7 +34,7 @@ def main(*, name: str, code: str, origin: str) -> None:
     with open(mod_rs, "w") as fp:
         for line in content.splitlines():
             if line.strip() == "fn rules(rule_code: Rule, path: &Path) -> Result<()> {":
-                indent = line.split("fn rules(rule_code: Rule, path: &Path) -> Result<()> {")[0]
+                indent = get_indent(line)
                 fp.write(f'{indent}#[test_case(Rule::{code}, Path::new("{code}.py"); "{code}")]')
                 fp.write("\n")
 
@@ -99,7 +99,7 @@ impl Violation for %s {
                 continue
 
             if line.strip() == f"// {origin}":
-                indent = line.split("//")[0]
+                indent = get_indent(line)
                 fp.write(f"{indent}{code} => violations::{name},")
                 fp.write("\n")
                 has_written = True