Nox: use inplace installs (#5865)

Author: tseaver

packages/google-cloud-redis/nox.py

@@ -34,8 +34,10 @@ def default(session):
     Python corresponding to the ``nox`` binary the ``PATH`` can
     run the tests.
     """
-    # Install all test dependencies, then install this package in-place.
-    session.install('mock', 'pytest', 'pytest-cov', *LOCAL_DEPS)
+    # Install all test dependencies, then install local packages in-place.
+    session.install('mock', 'pytest', 'pytest-cov')
+    for local_dep in LOCAL_DEPS:
+        session.install('-e', local_dep)
     session.install('-e', '.')
 
     # Run py.test against the unit tests.