diff --git a/filecheck/filecheck.py b/filecheck/filecheck.py
index be90b82..65fd65f 100644
--- a/filecheck/filecheck.py
+++ b/filecheck/filecheck.py
@@ -326,7 +326,7 @@ class File(FileBase):
     def make_tempdir(self) -> Path:
         """Make a temporary directory at self.tempdir_path."""
         if not self.tempdir_path.exists():
-            self.tempdir_path.mkdir()
+            self.tempdir_path.mkdir(parents=True)
         return self.tempdir_path
 
     #######################
diff --git a/kittengroomer/helpers.py b/kittengroomer/helpers.py
index 9d2ef4e..4d4eae9 100644
--- a/kittengroomer/helpers.py
+++ b/kittengroomer/helpers.py
@@ -316,7 +316,7 @@ class KittenGroomerBase(object):
     def safe_mkdir(self, directory_path: Path):
         """Make a directory if it does not exist."""
         if not directory_path.exists():
-            os.makedirs(directory_path)
+            directory_path.mkdir(parents=True)
 
     def list_all_files(self, directory_path: Path) -> Iterator[Path]:
         """Generator yielding path to all of the files in a directory tree."""
diff --git a/tests/test_kittengroomer.py b/tests/test_kittengroomer.py
index 6ab4ee6..11d677c 100644
--- a/tests/test_kittengroomer.py
+++ b/tests/test_kittengroomer.py
@@ -254,7 +254,7 @@ class TestFileBase:
             file = FileBase(file_path, dst_path)
         with mock.patch('kittengroomer.helpers.shutil.copy') as mock_copy:
             file.safe_copy()
-            mock_copy.assert_called_once_with(str(file_path), str(dst_path))
+            mock_copy.assert_called_once_with(file_path, dst_path)
 
     def test_safe_copy_removes_exec_perms(self):
         """`safe_copy` should create a file that doesn't have any of the