diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c70849e..c47fa8a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -132,7 +132,6 @@ jobs:
           LEGACY_USER_CLIENT_ID: ${{ secrets.LEGACY_USER_CLIENT_ID }}
           LEGACY_USER_CLIENT_SECRET: ${{ secrets.LEGACY_USER_CLIENT_SECRET }}
           LEGACY_USER_REFRESH_TOKEN: ${{ secrets.LEGACY_USER_REFRESH_TOKEN }}
-          SCOPED_USER_DROPBOX_TOKEN: ${{ secrets.SCOPED_USER_DROPBOX_TOKEN }}
           SCOPED_USER_CLIENT_ID: ${{ secrets.SCOPED_USER_CLIENT_ID }}
           SCOPED_USER_CLIENT_SECRET: ${{ secrets.SCOPED_USER_CLIENT_SECRET }}
           SCOPED_USER_REFRESH_TOKEN: ${{ secrets.SCOPED_USER_REFRESH_TOKEN }}
diff --git a/.github/workflows/coverage.yml b/.github/workflows/coverage.yml
index 19d8371..338de00 100644
--- a/.github/workflows/coverage.yml
+++ b/.github/workflows/coverage.yml
@@ -64,7 +64,6 @@ jobs:
           LEGACY_USER_CLIENT_ID: ${{ secrets.LEGACY_USER_CLIENT_ID }}
           LEGACY_USER_CLIENT_SECRET: ${{ secrets.LEGACY_USER_CLIENT_SECRET }}
           LEGACY_USER_REFRESH_TOKEN: ${{ secrets.LEGACY_USER_REFRESH_TOKEN }}
-          SCOPED_USER_DROPBOX_TOKEN: ${{ secrets.SCOPED_USER_DROPBOX_TOKEN }}
           SCOPED_USER_CLIENT_ID: ${{ secrets.SCOPED_USER_CLIENT_ID }}
           SCOPED_USER_CLIENT_SECRET: ${{ secrets.SCOPED_USER_CLIENT_SECRET }}
           SCOPED_USER_REFRESH_TOKEN: ${{ secrets.SCOPED_USER_REFRESH_TOKEN }}
diff --git a/dropbox/dropbox_client.py b/dropbox/dropbox_client.py
index e751842..e818390 100644
--- a/dropbox/dropbox_client.py
+++ b/dropbox/dropbox_client.py
@@ -667,7 +667,6 @@ def raise_dropbox_error_for_resp(self, res):
         elif res.status_code == 400:
             try:
                 if res.json().get('error') == 'invalid_grant':
-                    request_id = res.headers.get('x-dropbox-request-id')
                     err = stone_serializers.json_compat_obj_decode(
                         AuthError_validator, 'invalid_access_token')
                     raise AuthError(request_id, err)
diff --git a/test/integration/test_dropbox.py b/test/integration/test_dropbox.py
index a29a3e0..5715eeb 100644
--- a/test/integration/test_dropbox.py
+++ b/test/integration/test_dropbox.py
@@ -29,7 +29,7 @@
 from dropbox.exceptions import (
     ApiError,
     AuthError,
-    # BadInputError,
+    BadInputError,
     PathRootError,
 )
 from dropbox.files import (
@@ -78,19 +78,37 @@ def dbx_session(request):
     return create_session(ca_certs=request.param)
 
 
+def _refresh_dbx(dbx_session=None):
+    # Build a user client from the refresh token instead of a stored access
+    # token; the SDK mints a short-lived access token on demand. Access tokens
+    # were the recurring cause of CI auth failures, so this removes them from
+    # the required credentials.
+    refresh_token = _value_from_env_or_die(format_env_name(SCOPED_KEY, USER_KEY, REFRESH_TOKEN_KEY))
+    app_key = _value_from_env_or_die(format_env_name(SCOPED_KEY, USER_KEY, CLIENT_ID_KEY))
+    app_secret = _value_from_env_or_die(format_env_name(SCOPED_KEY, USER_KEY, CLIENT_SECRET_KEY))
+    return Dropbox(oauth2_refresh_token=refresh_token,
+                   app_key=app_key, app_secret=app_secret,
+                   session=dbx_session)
+
+
 @pytest.fixture()
 def dbx_from_env(dbx_session):
-    oauth2_token = _value_from_env_or_die(format_env_name())
-    return Dropbox(oauth2_token, session=dbx_session)
+    return _refresh_dbx(dbx_session)
 
 
 @pytest.fixture()
 def refresh_dbx_from_env(dbx_session):
+    return _refresh_dbx(dbx_session)
+
+
+@pytest.fixture()
+def bad_secret_dbx_from_env(dbx_session):
+    # Valid refresh token and app key, but a wrong app secret, so the token
+    # endpoint rejects the refresh.
     refresh_token = _value_from_env_or_die(format_env_name(SCOPED_KEY, USER_KEY, REFRESH_TOKEN_KEY))
     app_key = _value_from_env_or_die(format_env_name(SCOPED_KEY, USER_KEY, CLIENT_ID_KEY))
-    app_secret = _value_from_env_or_die(format_env_name(SCOPED_KEY, USER_KEY, CLIENT_SECRET_KEY))
     return Dropbox(oauth2_refresh_token=refresh_token,
-                   app_key=app_key, app_secret=app_secret,
+                   app_key=app_key, app_secret='invalid_app_secret',
                    session=dbx_session)
 
 
@@ -120,13 +138,13 @@ def dbx_share_url_from_env():
 DUMMY_PAYLOAD = string.ascii_letters.encode('ascii')
 
 RANDOM_FOLDER = random.sample(string.ascii_letters, 15)
-TIMESTAMP = str(datetime.datetime.utcnow())
+TIMESTAMP = str(datetime.datetime.now(datetime.timezone.utc))
 STATIC_FILE = "/test.txt"
 
 @pytest.fixture(scope='module')
 def pytest_setup():
     print("Setup")
-    dbx = Dropbox(_value_from_env_or_die(format_env_name()))
+    dbx = _refresh_dbx()
 
     try:
         dbx.files_delete(STATIC_FILE)
@@ -162,6 +180,11 @@ def test_multi_auth(self, dbx_from_env, dbx_app_auth_from_env, dbx_share_url_fro
     def test_refresh(self, refresh_dbx_from_env):
         refresh_dbx_from_env.users_get_current_account()
 
+    def test_refresh_failure_error_detail(self, bad_secret_dbx_from_env):
+        with pytest.raises(BadInputError) as cm:
+            bad_secret_dbx_from_env.users_get_current_account()
+        assert 'invalid_client' in cm.value.message
+
     def test_app_auth(self, dbx_app_auth_from_env):
         dbx_app_auth_from_env.check_app(query="hello world")