diff --git a/python-Traits.spec b/python-Traits.spec
index 0dbb6f6..059d8af 100644
--- a/python-Traits.spec
+++ b/python-Traits.spec
@@ -39,8 +39,11 @@ Summary:        %{summary}
 %{?python_provide:%python_provide python%{python3_pkgversion}-%{modname}}
 BuildRequires:  python%{python3_pkgversion}-devel
 BuildRequires:  python%{python3_pkgversion}-setuptools
+BuildRequires:  python%{python3_pkgversion}-mock
 BuildRequires:  python%{python3_pkgversion}-nose
+BuildRequires:  python%{python3_pkgversion}-six
 Requires:       python%{python3_pkgversion}-numpy
+Requires:       python%{python3_pkgversion}-six
 Provides:       python%{python3_pkgversion}-%{modname} = %{version}-%{release}
 
 %description -n python%{python3_pkgversion}-%{srcname}