\documentclass{beamer}
\usepackage{amsmath}
\usepackage{bytefield}
\begin{document}

\begin{align}
    x &= \begin{bmatrix} 1 \\ 3 \end{bmatrix}
\end{align}

\begin{frame}
\begin{bytefield}{2}
\begin{leftwordgroup}{Test}
\bitbox{1}{Test}  & \bitbox{1}{Test}
\end{leftwordgroup} \\[1.5ex]
\end{bytefield}
\end{frame}

\end{document}
