diff --git a/payload_signer_unittest.cc b/payload_signer_unittest.cc
index 972bf2d..086e54a 100644
--- a/payload_signer_unittest.cc
+++ b/payload_signer_unittest.cc
@@ -83,7 +83,7 @@
 void SignSampleData(vector<char>* out_signature_blob) {
   string data_path;
   ASSERT_TRUE(
-      utils::MakeTempFile("/tmp/data.XXXXXX", &data_path, NULL));
+      utils::MakeTempFile("data.XXXXXX", &data_path, NULL));
   ScopedPathUnlinker data_path_unlinker(data_path);
   ASSERT_TRUE(utils::WriteFile(data_path.c_str(),
                                kDataToSign,