diff --git a/var/spack/repos/builtin/packages/py-unittest2/package.py b/var/spack/repos/builtin/packages/py-unittest2/package.py
index bdac19d8556..8aa4a3e7050 100644
--- a/var/spack/repos/builtin/packages/py-unittest2/package.py
+++ b/var/spack/repos/builtin/packages/py-unittest2/package.py
@@ -36,3 +36,6 @@ class PyUnittest2(PythonPackage):
 
     depends_on('py-setuptools', type='build')
     depends_on('py-enum34', when='^python@:3.3', type=('build', 'run'))
+    depends_on('py-traceback2', type=('build', 'run'))
+    depends_on('py-six', type=('build', 'run'))
+    depends_on('py-argparse', type=('build', 'run'))