---
 tests/unit/test__http.py    |    3 +++
 tests/unit/test__signing.py |    5 ++++-
 tests/unit/test_blob.py     |    2 ++
 tests/unit/test_client.py   |    5 ++++-
 4 files changed, 13 insertions(+), 2 deletions(-)

--- a/tests/unit/test__http.py
+++ b/tests/unit/test__http.py
@@ -12,12 +12,15 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import os.path
+import sys
 import unittest
 from unittest.mock import patch
 
 import mock
 
 from google.cloud.storage import _helpers
+sys.path.insert(0, os.path.abspath(os.path.join(__file__, '..', '..', '..')))
 from tests.unit.test__helpers import GCCL_INVOCATION_TEST_CONST
 
 
--- a/tests/unit/test__signing.py
+++ b/tests/unit/test__signing.py
@@ -19,6 +19,8 @@ import binascii
 import calendar
 import datetime
 import json
+import os.path
+import sys
 import time
 import unittest
 import urllib.parse
@@ -26,7 +28,8 @@ import urllib.parse
 import mock
 import pytest
 
-from . import _read_local_json
+sys.path.insert(0, os.path.abspath(os.path.join(__file__, '..', '..')))
+from unit import _read_local_json
 
 
 _SERVICE_ACCOUNT_JSON = _read_local_json("url_signer_v4_test_account.json")
--- a/tests/unit/test_blob.py
+++ b/tests/unit/test_blob.py
@@ -18,6 +18,7 @@ import hashlib
 import io
 import json
 import os
+import sys
 import tempfile
 import unittest
 import http.client
@@ -35,6 +36,7 @@ from google.cloud.storage.retry import (
 )
 from google.cloud.storage.retry import DEFAULT_RETRY_IF_ETAG_IN_JSON
 from google.cloud.storage.retry import DEFAULT_RETRY_IF_GENERATION_SPECIFIED
+sys.path.insert(0, os.path.abspath(os.path.join(__file__, '..', '..', '..')))
 from tests.unit.test__helpers import GCCL_INVOCATION_TEST_CONST
 
 
--- a/tests/unit/test_client.py
+++ b/tests/unit/test_client.py
@@ -18,9 +18,11 @@ import io
 import json
 from unittest.mock import patch
 import mock
+import os.path
 import pytest
 import re
 import requests
+import sys
 import unittest
 import urllib
 
@@ -33,8 +35,9 @@ from google.cloud.storage._helpers impor
 from google.cloud.storage import _helpers
 from google.cloud.storage.retry import DEFAULT_RETRY
 from google.cloud.storage.retry import DEFAULT_RETRY_IF_GENERATION_SPECIFIED
+sys.path.insert(0, os.path.abspath(os.path.join(__file__, '..', '..', '..')))
 from tests.unit.test__helpers import GCCL_INVOCATION_TEST_CONST
-from . import _read_local_json
+from tests.unit import _read_local_json
 
 _SERVICE_ACCOUNT_JSON = _read_local_json("url_signer_v4_test_account.json")
 _CONFORMANCE_TESTS = _read_local_json("url_signer_v4_test_data.json")[