diff --git a/swh/__init__.py b/swh/__init__.py
new file mode 100644
index 0000000..69e3be5
--- /dev/null
+++ b/swh/__init__.py
@@ -0,0 +1 @@
+__path__ = __import__('pkgutil').extend_path(__path__, __name__)
diff --git a/sandbox/__init__.py b/swh/sandbox/__init__.py
similarity index 100%
rename from sandbox/__init__.py
rename to swh/sandbox/__init__.py
diff --git a/sandbox/tests/__init__.py b/swh/sandbox/tests/__init__.py
similarity index 100%
rename from sandbox/tests/__init__.py
rename to swh/sandbox/tests/__init__.py
diff --git a/sandbox/tests/test_towel_day.py b/swh/sandbox/tests/test_towel_day.py
similarity index 84%
rename from sandbox/tests/test_towel_day.py
rename to swh/sandbox/tests/test_towel_day.py
index 2563eb9..4f40720 100644
--- a/sandbox/tests/test_towel_day.py
+++ b/swh/sandbox/tests/test_towel_day.py
@@ -1,8 +1,8 @@
 from datetime import datetime
-from sandbox import is_towel_day
+from swh.sandbox import is_towel_day
 
 
 def test_towel_day():
     assert is_towel_day(datetime(2011, 5, 25))
     assert not is_towel_day(datetime(2011, 6, 25))
     assert not is_towel_day(datetime(2011, 5, 26))
diff --git a/sandbox/tests/test_useful.py b/swh/sandbox/tests/test_useful.py
similarity index 68%
rename from sandbox/tests/test_useful.py
rename to swh/sandbox/tests/test_useful.py
index 66eee61..9ce9b6f 100644
--- a/sandbox/tests/test_useful.py
+++ b/swh/sandbox/tests/test_useful.py
@@ -1,5 +1,5 @@
-from sandbox import useful_function
+from swh.sandbox import useful_function
 
 
 def test_useful_ok():
     assert useful_function() == 42, 'you forgot your towel!'
diff --git a/tox.ini b/tox.ini
index 66353d0..c12e4f0 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,24 +1,24 @@
 [tox]
 envlist=flake8,py3
 
 [testenv:py3]
 deps =
   pytest-cov
 commands =
-  pytest --cov=sandbox --cov-branch {posargs}
+  pytest --cov=swh --cov-branch {posargs}
 
 [testenv:flake8]
 skip_install = true
 deps =
   flake8
 commands =
   {envpython} -m flake8
 
 
 [testenv:flake8-phab]
 skip_install = true
 deps =
   flake8
   git+https://framagit.org/douardda/flake8-phabricator-formatter.git
 commands =
   {envpython} -m flake8 --format=phabricator --output-file=.phabricator-lint