diff --git a/tools/install_venv_common.py b/tools/install_venv_common.py
index 0999e2c..92d66ae 100644
--- a/tools/install_venv_common.py
+++ b/tools/install_venv_common.py
@@ -119,8 +119,7 @@
         self.pip_install('setuptools')
         self.pip_install('pbr')
 
-        self.pip_install('-r', self.requirements)
-        self.pip_install('-r', self.test_requirements)
+        self.pip_install('-r', self.requirements, '-r', self.test_requirements)
 
     def post_process(self):
         self.get_distro().post_process()