# Beamer: block in minipage/columns are out of the page

When I add a block in beamer inside a minipage, I have a block that is bigger than the minipage instead of a block that fits into the minipage. So this gives me really strange alignements:

Any idea?

Thanks !

MWE:

\documentclass{beamer}

\usetheme{Warsaw}

\begin{document}
\begin{frame}{My slide}
\begin{minipage}{.3\linewidth}
\begin{exampleblock}{My title}
Hello, I'm an example block with several lines on the left part of my slide.
\end{exampleblock}
\end{minipage}%
\begin{minipage}{.7\linewidth}
Hello, I'm a classical text with several lines on the right part of my slide.
\end{minipage}
\end{frame}
\end{document}


If you use columns, the issue does not arise.

\documentclass{beamer}

\usetheme{Warsaw}

\begin{document}
\begin{frame}{My slide}
\begin{columns}
\begin{column}{.3\linewidth}
\begin{exampleblock}{My title}
Hello, I'm an example block with several lines on the left part of my slide.
\end{exampleblock}
\end{column}%
\begin{column}{.7\linewidth}
Hello, I'm a classical text with several lines on the right part of my slide.
\end{column}
\end{columns}
\end{frame}
\end{document}