How to change the format of the “and” bibstring using xpatch?

When using biblatex's textcite command with a two-authored reference I want the "and" between them to be in italics. I managed to get the same for the "et al." \bibstring using the following code snippet, based on the xpatch package (and thanks to this great answer):

\xpatchbibmacro{name:andothers}{%
\bibstring{andothers}%
}{%
\bibstring[\emph]{andothers}%
}{}{}


However, just replacing name:andothers with name:and or and does not achieve that, as can be seen from the following MWE:

\begin{filecontents}{\jobname.bib}
@book{test,
author = {Uthor, A. and Uthor, B.},
title = {And and Or or Or and And},
year = {2014}}
\end{filecontents}

\documentclass{article}
\usepackage{biblatex}
\usepackage{xpatch}
%%%% This does not work %%%%
\xpatchbibmacro{name:and}{%
\bibstring{and}%
}{%
\bibstring[\emph]{and}%
}{}{}
%%%% %%%% %%%%
\begin{document}
This is how it looks like: \textcite{test} but the "and" should be italic, as in "Uthor \emph{and} Uthor"
\end{document}


Unfortunately I could not find, where in the biblatex sources the and \bibstring is defined.

There is only a name:andothers defined. However, this may help:
\documentclass{article}