diff --git a/python-billiard.spec b/python-billiard.spec
index 351ded2..cdc3cd2 100644
--- a/python-billiard.spec
+++ b/python-billiard.spec
@@ -36,9 +36,11 @@ BuildRequires:  gcc
 BuildRequires:  python2-devel
 BuildRequires:  python2-setuptools
 %if %{with tests}
+BuildRequires:  python2-case
 BuildRequires:  python2-mock
+BuildRequires:  python2-psutil
 BuildRequires:  python2-pytest
-BuildRequires:  python2-case
+BuildRequires:  python2-simple
 BuildRequires:  python2-unittest2
 %endif
 %{?python_provide:%python_provide python2-%{srcname}}
@@ -54,9 +56,11 @@ Summary:        %{summary}
 BuildRequires:  python3-devel
 BuildRequires:  python3-setuptools
 %if %{with tests}
+BuildRequires:  python3-case
 BuildRequires:  python3-mock
+BuildRequires:  python3-psutil
 BuildRequires:  python3-pytest
-BuildRequires:  python3-case
+BuildRequires:  python3-simple
 BuildRequires:  python3-unittest2
 %endif
 %{?python_provide:%python_provide python3-%{srcname}}