diff --git a/src/environments/groupthm.pysty3 b/src/environments/groupthm.pysty3
index e1882a0..71bd0cd 100644
--- a/src/environments/groupthm.pysty3
+++ b/src/environments/groupthm.pysty3
@@ -31,12 +31,12 @@ __HEADER__(Grouping theorems for easier customization.)
 
 \msg_new:nnn { groupthm } { unknown ~ key }
 {
-  Unknown ~  key ~ #1 ~ supplied ~ \msg_line_context:
+  Unknown ~  key ~ '#1' ~ supplied ~ \msg_line_context:
 }
 
 \msg_new:nnn { groupthm } { unknown ~ group }
 {
-  Unknown  ~ group ~ #1 ~ supplied ~ \msg_line_context:
+  Unknown  ~ group ~ '#1' ~ supplied ~ \msg_line_context:
 }
 
 %%% Variables
@@ -76,7 +76,8 @@ __HEADER__(Grouping theorems for easier customization.)
     mapname      .groups:n      = { theoremgroup },
     thmtools     .clist_set:N   = \l_groupthm_thmtools_clist,
     thmtools     .default:n     = {},
-    thmtools     .groups:n      = { theoremgroup, groupedtheorem, theoremvariants }
+    thmtools     .groups:n      = { theoremgroup, groupedtheorem, theoremvariants }%,
+%    unknown      .code:n        = \msg_error:nnn { groupthm } { unknown ~ group } { \l_keys_key_str }
   }
 
 
@@ -202,6 +203,8 @@ __HEADER__(Grouping theorems for easier customization.)
   \new_grouped_theorem_from_keys:nn { #2 } { #1 }
 }
 
+
+
 %%% Default groups available
 
 \NewTheoremGroup