diff --git a/pre-upload_unittest.py b/pre-upload_unittest.py
index 93a8f6f..e742711 100755
--- a/pre-upload_unittest.py
+++ b/pre-upload_unittest.py
@@ -352,14 +352,10 @@
   """Tests for _check_project_prefix."""
 
   def setUp(self):
-    self.orig_cwd = os.getcwd()
     os.chdir(self.tempdir)
     self.file_mock = self.PatchObject(pre_upload, '_get_affected_files')
     self.desc_mock = self.PatchObject(pre_upload, '_get_commit_desc')
 
-  def tearDown(self):
-    os.chdir(self.orig_cwd)
-
   def _WriteAliasFile(self, filename, project):
     """Writes a project name to a file, creating directories if needed."""
     os.makedirs(os.path.dirname(filename))
@@ -1507,7 +1503,6 @@
   """Various tests for utility functions."""
 
   def setUp(self):
-    self.orig_cwd = os.getcwd()
     os.chdir(self.tempdir)
 
     self.PatchObject(git, 'RawDiff', return_value=[
@@ -1520,9 +1515,6 @@
         DiffEntry(src_file='scripts/sync_sonic.py', status='D'),
     ])
 
-  def tearDown(self):
-    os.chdir(self.orig_cwd)
-
   def _WritePresubmitIgnoreFile(self, subdir, data):
     """Writes to a .presubmitignore file in the passed-in subdirectory."""
     directory = os.path.join(self.tempdir, subdir)