--- a/testing/mozharness/configs/developer_config.py
+++ b/testing/mozharness/configs/developer_config.py
@@ -35,15 +35,16 @@ config = {
     "virtualenv_path": '%s/build/venv' % os.getcwd(),
     "preflight_run_cmd_suites": [],
     "postflight_run_cmd_suites": [],
 
     # Tooltool related
     "download_tooltool": True,
     "tooltool_cache": os.path.join(LOCAL_WORKDIR, "builds/tooltool_cache"),
     "tooltool_cache_path": os.path.join(LOCAL_WORKDIR, "builds/tooltool_cache"),
+    "tooltool_authentication_file": os.path.join(LOCAL_WORKDIR, "relengapi.tok"),
 
     # VCS tools
     "gittool.py": 'http://hg.mozilla.org/build/puppet/raw-file/faaf5abd792e/modules/packages/files/gittool.py',
 
     # Android related
     "host_utils_url": "https://api.pub.build.mozilla.org/tooltool/sha512/372c89f9dccaf5ee3b9d35fd1cfeb089e1e5db3ff1c04e35aa3adc8800bc61a2ae10e321f37ae7bab20b56e60941f91bb003bcb22035902a73d70872e7bd3282",
 }