diff --git a/src/rapids_pre_commit_hooks/codeowners.py b/src/rapids_pre_commit_hooks/codeowners.py
index 1a8a618..72091bd 100644
--- a/src/rapids_pre_commit_hooks/codeowners.py
+++ b/src/rapids_pre_commit_hooks/codeowners.py
@@ -171,12 +171,12 @@ def check_codeowners(linter: Linter, args: argparse.Namespace) -> None:
             check_codeowners_line(linter, args, codeowners_line, found_files)
 
     new_text = ""
-    for required_codeowners in REQUIRED_CODEOWNERS_LINES:
-        if required_codeowners.file not in found_files:
+    for required_codeowners_line in REQUIRED_CODEOWNERS_LINES:
+        if required_codeowners_line.file not in found_files:
             new_text += (
-                f"{required_codeowners.file} "
+                f"{required_codeowners_line.file} "
                 f"""{' '.join(owner(project_prefix=args.project_prefix)
-                        for owner in required_codeowners.owners)}\n"""
+                        for owner in required_codeowners_line.owners)}\n"""
             )
     if new_text:
         if linter.content and not linter.content.endswith("\n"):
diff --git a/test/rapids_pre_commit_hooks/test_codeowners.py b/test/rapids_pre_commit_hooks/test_codeowners.py
index dfef820..bb91696 100644
--- a/test/rapids_pre_commit_hooks/test_codeowners.py
+++ b/test/rapids_pre_commit_hooks/test_codeowners.py
@@ -13,13 +13,32 @@
 # limitations under the License.
 
 from textwrap import dedent
-from unittest.mock import Mock
+from unittest.mock import Mock, patch
 
 import pytest
 
 from rapids_pre_commit_hooks import codeowners
 from rapids_pre_commit_hooks.lint import Linter, LintWarning, Replacement
 
+patch_required_codeowners_lines = patch(
+    "rapids_pre_commit_hooks.codeowners.REQUIRED_CODEOWNERS_LINES",
+    [
+        codeowners.RequiredCodeownersLine(
+            file="CMakeLists.txt",
+            owners=[
+                codeowners.cmake_codeowners,
+            ],
+        ),
+        codeowners.RequiredCodeownersLine(
+            file="pyproject.toml",
+            owners=[
+                codeowners.hard_coded_codeowners("@rapidsai/ci-codeowners"),
+            ],
+            allow_extra=True,
+        ),
+    ],
+)
+
 
 @pytest.mark.parametrize(
     ["line", "skip", "codeowners_line"],
@@ -169,8 +188,13 @@ def test_parse_codeowners_line(line, skip, codeowners_line):
                 ),
             ],
         ),
+        (
+            "pyproject.toml @someone-else @rapidsai/ci-codeowners",
+            [],
+        ),
     ],
 )
+@patch_required_codeowners_lines
 def test_check_codeowners_line(line, warnings):
     codeowners_line = codeowners.parse_codeowners_line(line, 0)
     linter = Linter(".github/CODEOWNERS", line)
@@ -258,6 +282,7 @@ def test_check_codeowners_line(line, warnings):
         ),
     ],
 )
+@patch_required_codeowners_lines
 def test_check_codeowners(content, warnings):
     linter = Linter(".github/CODEOWNERS", content)
     codeowners.check_codeowners(linter, Mock(project_prefix="cudf"))