diff --git a/luamml-patches-amsmath.sty b/luamml-patches-amsmath.sty
index fa6ec7e..f8933c4 100644
--- a/luamml-patches-amsmath.sty
+++ b/luamml-patches-amsmath.sty
@@ -406,10 +406,3 @@
}
}
}
-
-\cs_set:Npn \env@cases {
- \let \@ifnextchar \new@ifnextchar
- \left \lbrace
- \def \arraystretch {1.2}
- \array {@{}l@{\quad \luamml_flag_ignore:}l@{}}
-}
diff --git a/luamml-patches-kernel.sty b/luamml-patches-kernel.sty
index e03a991..457d14d 100644
--- a/luamml-patches-kernel.sty
+++ b/luamml-patches-kernel.sty
@@ -34,6 +34,13 @@
\__luamml_kernel_phantom:Vnn \g__luamml_kernel_phantom_int
}
+\cs_set:Npn \env@cases {
+ \let \@ifnextchar \new@ifnextchar
+ \left \lbrace
+ \def \arraystretch {1.2}
+ \array {@{}l@{\quad \luamml_flag_ignore:}l@{}}
+}
+
\@ifpackageloaded {unicode-math} {} {
\cs_new:Npn \__luamml_kernel_define_character:Nnn #1#2#3 {
\cs_set:cpx { \cs_to_str:N #1 ~ } {
diff --git a/testfiles-lua/cases.mlr b/testfiles-lua/cases.mlr
new file mode 100644
index 0000000..78aa953
--- /dev/null
+++ b/testfiles-lua/cases.mlr
@@ -0,0 +1,161 @@
+
+
+
+
+
+
+
+
diff --git a/testfiles-lua/cases.mlt b/testfiles-lua/cases.mlt
new file mode 100644
index 0000000..a0bfb14
--- /dev/null
+++ b/testfiles-lua/cases.mlt
@@ -0,0 +1,43 @@
+\RequirePackage{pdfmanagement-testphase}
+\DeclareDocumentMetadata{
+ uncompress,
+ pdfversion = 2.0,
+}
+\documentclass{article}
+\usepackage[l3build]{luamml-demo}
+\usepackage{tagpdf}
+\tagpdfsetup{
+ activate-all,
+ interwordspace=true,
+}
+
+\begin{document}
+\tagstructbegin{tag=Document}
+\LuaMMLTagAF{} {
+\[
+ \left(\begin{matrix}
+ 1 & 0 & 0 \\
+ 0 & 1 & 0 \\
+ 0 & 0 & 1
+ \end{matrix}\right)
+ =
+ \begin{cases}
+ 1 & \mbox{if $a=b$}\\
+ 2 & \mbox{else}
+ \end{cases}
+\]
+}
+\LuaMMLTagAF{} {
+\[
+ x = \frac{-b \pm \sqrt{b^2-4ac}}{2a}.
+\]
+}
+\LuaMMLTagAF{} {
+\[
+ \sum_a\underline c\dot bc'
+\]
+}
+
+Es gilt \LuaMMLTagAF{}{$\sin(x)-\sin(x+2\pi)=0$}.
+\tagstructend
+\end{document}
diff --git a/testfiles-lua/test_xml.mlt b/testfiles-lua/test_xml.mlt
index a732ade..3c72240 100644
--- a/testfiles-lua/test_xml.mlt
+++ b/testfiles-lua/test_xml.mlt
@@ -24,8 +24,8 @@
\end{pmatrix}
=
\begin{cases}
- 1 & $if $a=b\\
- 2 & $else$
+ 1 & \text{if $a=b$}\\
+ 2 & \text{else}
\end{cases}
\]
}