diff --git a/sdks/python/tox.ini b/sdks/python/tox.ini
index f6f8430d48f9..f792bbfcc614 100644
--- a/sdks/python/tox.ini
+++ b/sdks/python/tox.ini
@@ -54,28 +54,28 @@ commands_post =
 [testenv:py27]
 commands =
   python apache_beam/examples/complete/autocomplete_test.py
-  python setup.py nosetests --ignore-files '.*py3.py$'
+  python setup.py nosetests --ignore-files '.*py3.py$' {posargs}
 
 [testenv:py35]
 setenv =
   RUN_SKIPPED_PY3_TESTS=0
 commands =
   python apache_beam/examples/complete/autocomplete_test.py
-  python setup.py nosetests
+  python setup.py nosetests {posargs}
 
 [testenv:py36]
 setenv =
   RUN_SKIPPED_PY3_TESTS=0
 commands =
   python apache_beam/examples/complete/autocomplete_test.py
-  python setup.py nosetests
+  python setup.py nosetests {posargs}
 
 [testenv:py37]
 setenv =
   RUN_SKIPPED_PY3_TESTS=0
 commands =
   python apache_beam/examples/complete/autocomplete_test.py
-  python setup.py nosetests
+  python setup.py nosetests {posargs}
 
 [testenv:py27-cython]
 # cython tests are only expected to work in linux (2.x and 3.x)
@@ -85,7 +85,7 @@ commands =
 platform = linux2
 commands =
   python apache_beam/examples/complete/autocomplete_test.py
-  python setup.py nosetests --ignore-files '.*py3.py$'
+  python setup.py nosetests --ignore-files '.*py3.py$' {posargs}
 
 [testenv:py35-cython]
 # cython tests are only expected to work in linux (2.x and 3.x)
@@ -97,7 +97,7 @@ setenv =
   RUN_SKIPPED_PY3_TESTS=0
 commands =
   python apache_beam/examples/complete/autocomplete_test.py
-  python setup.py nosetests
+  python setup.py nosetests {posargs}
 
 [testenv:py36-cython]
 # cython tests are only expected to work in linux (2.x and 3.x)
@@ -109,7 +109,7 @@ setenv =
   RUN_SKIPPED_PY3_TESTS=0
 commands =
   python apache_beam/examples/complete/autocomplete_test.py
-  python setup.py nosetests
+  python setup.py nosetests {posargs}
 
 [testenv:py37-cython]
 # cython tests are only expected to work in linux (2.x and 3.x)
@@ -121,33 +121,33 @@ setenv =
   RUN_SKIPPED_PY3_TESTS=0
 commands =
   python apache_beam/examples/complete/autocomplete_test.py
-  python setup.py nosetests
+  python setup.py nosetests {posargs}
 
 [testenv:py27-gcp]
 extras = test,gcp
 commands =
   python apache_beam/examples/complete/autocomplete_test.py
-  python setup.py nosetests --ignore-files '.*py3.py$'
+  python setup.py nosetests --ignore-files '.*py3.py$' {posargs}
   # Old and new Datastore client unit tests cannot be run in the same process
   # due to conflicting protobuf modules.
   # TODO(BEAM-4543): Remove these separate nosetests invocations once the
   # googledatastore dependency is removed.
-  python setup.py nosetests --tests apache_beam.io.gcp.datastore.v1
-  python setup.py nosetests --tests apache_beam.io.gcp.datastore.v1new
+  python setup.py nosetests {posargs} --tests apache_beam.io.gcp.datastore.v1
+  python setup.py nosetests {posargs} --tests apache_beam.io.gcp.datastore.v1new
 
 [testenv:py35-gcp]
 setenv =
   RUN_SKIPPED_PY3_TESTS=0
 extras = test,gcp
 commands =
-  python setup.py nosetests
+  python setup.py nosetests {posargs}
 
 [testenv:py37-gcp]
 setenv =
   RUN_SKIPPED_PY3_TESTS=0
 extras = test,gcp
 commands =
-  python setup.py nosetests
+  python setup.py nosetests {posargs}
 
 [testenv:py27-lint]
 deps =