diff --git a/tests/environments/groupthm/test.tex b/tests/environments/groupthm/test.tex
new file mode 100644
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+++ b/tests/environments/groupthm/test.tex
@@ -0,0 +1,101 @@
+\documentclass{article}
+
+\usepackage[enable-debug]{expl3}
+
+\ExplSyntaxOn
+\debug_on:n { all }
+\ExplSyntaxOff
+
+\usepackage{mkessler-groupthm}
+
+\DeclareTheoremGroupRule {dagger}{before}{star}
+\DeclareTheoremGroupRule {starred}{higher}{dagger}
+
+\NewGroupedTheorem
+  [
+    group = {big, starred, dagger}
+  ]{dlemma}
+
+\NewGroupedTheorem
+  [
+    group = {big, star}
+  ]{slemma}
+
+\NewGroupedTheorem
+  [
+    group = {big},
+%    thmtools = {sibling = insection}
+  ]{lemma}
+
+\NewGroupedTheorem
+[
+  name=Proposition, group = {dagger}
+]{dproposition}
+
+\NewGroupedTheorem
+[
+  name=Proposition,
+  group = {star}
+]{sproposition}
+
+\NewGroupedTheorem
+[
+group = {dagger, star}
+]{test}
+
+
+\GenerateTheoremVariants[ group = {star, dagger} ]{example}
+
+\DeclareTheoremVariants{example} { !s !t+ }
+{
+  \IfBooleanT{#1}
+  {
+    \AddTheoremToGroup { star }
+  }
+  \IfBooleanT{#2}
+  {
+    \AddTheoremToGroup { dagger }
+  }
+}
+
+\begin{document}
+
+
+\b{hi}
+
+\begin{dlemma}
+
+\end{dlemma}
+%\begin{__example__groups_dagger_star}
+  test  
+%\end{__example__groups_dagger_star}
+
+\def\ex{__example__groups_}
+
+%\ShowHook{groupthm/groupsort}
+ 
+
+\begin{example}
+  test
+\end{example}
+
+\begin{example}+
+  test
+\end{example}
+
+\begin{example}*
+  test
+\end{example}
+
+\begin{example}*+
+  test
+\end{example}
+
+\begin{example*}
+  test
+\end{example*}
+
+
+
+  
+\end{document}