diff --git a/nox.py b/nox.py
index b68672e..05dfe34 100644
--- a/nox.py
+++ b/nox.py
@@ -16,9 +16,6 @@
 import os
 from tempfile import gettempdir
 
-GCP_REPO_TOOLS_REQ = (
-    'git+https://github.com/GoogleCloudPlatform/python-repo-tools')
-
 
 def session_lint(session):
     session.install('flake8', 'flake8-import-order')
@@ -29,13 +26,12 @@ def session_lint(session):
 
 
 def run_tests(session, requirements, gae=False):
-    session.install(GCP_REPO_TOOLS_REQ)
     session.install('-r', requirements)
     session.install('-e', '.')
 
     if gae:
         tmpdir = gettempdir()
-        session.run('gcprepotools', 'download-appengine-sdk', tmpdir)
+        session.run('gcp-devrel-py-tools', 'download-appengine-sdk', tmpdir)
         session.env['GAE_SDK_PATH'] = os.path.join(tmpdir, 'google_appengine')
 
     session.run(
diff --git a/requirements-dev-gaesdk.txt b/requirements-dev-gaesdk.txt
index 68bc778..f2bfad1 100644
--- a/requirements-dev-gaesdk.txt
+++ b/requirements-dev-gaesdk.txt
@@ -2,8 +2,8 @@
 WebOb==1.2.3
 Jinja2==2.6.0
 # The remaining requirements are defined by webapp2. These are the versions
-six==1.10.0
 # that were used with release 2.5.2, except for babel.
+six==1.10.0
 Mako==0.4.1
 Babel==2.2
 gaepytz==2011h
@@ -11,3 +11,4 @@ gaepytz==2011h
 pytest==2.9.1
 pytest-cov==2.2.1
 mock==2.0.0
+gcp-devrel-py-tools==0.0.8
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 1cc921b..648d555 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,9 +1,12 @@
+# These dependencies match App Engine SDK versions.
 WebOb==1.6.1
 Jinja2==2.8
 Mako==1.0.4
 Babel==2.3.4
 pytz==2016.6.1
+# These are test dependencies
 pytest==2.9.1
 pytest-cov==2.2.1
 mock==2.0.0
 six==1.10.0
+gcp-devrel-py-tools==0.0.8
diff --git a/tests/gae/conftest.py b/tests/gae/conftest.py
index facdc94..58ad205 100644
--- a/tests/gae/conftest.py
+++ b/tests/gae/conftest.py
@@ -15,7 +15,7 @@
 import os
 import sys
 
-from gcp.testing import appengine
+from gcp_devrel.testing import appengine
 import six