How to get \part and paragraphs (text) on the same page (memoir class)?

Question

Does someone know how to prevent the "\cleardoublepage" after each part in a memoir class document ?

I don't have the slightets idea how to do it.

\documentclass[a4paper,12pt]{memoir}
\usepackage[francais]{babel}
\usepackage[T1]{fontenc}     
\usepackage{lipsum}
\nonzeroparskip
\begin{document}
\part {Test}
lorem non justo. Nam lacus libero, pretium at, lobortis vitae, ultricies et, tellus.
Donec aliquet, tortor sed accumsan bibendum, erat ligula aliquet magna, vitae
Nam
ornare odio metus a mi.

Nam
\end{document}

I would like to have my part's and section's titles on the same page. Thanks

Answer 1

use

...
{\let\newpage\relax
\part {Test}}
lorem non justo. Nam lacus libero, pretium at, lobortis vitae, ultricies et, tellus.
...

if you need \part very often, you can redefine the command.

\let\Part\part
\renewcommand\part[2][]{{\let\newpage\relax
  \ifx\relax#1\relax\Part{#2}\else\Part[#1]{#2}\fi}}
\begin{document}
\part {Test}
...