diff --git a/text-crossrefs/sample-with-options.md b/text-crossrefs/sample-with-options.md
index 91b41fe..d28c175 100644
--- a/text-crossrefs/sample-with-options.md
+++ b/text-crossrefs/sample-with-options.md
@@ -52,6 +52,10 @@ Here are some precisions.[^2]
 
 [And this one is labelized at the end.]{#lblatend refanchor=end}
 
+<!-- Because of tcrf-default-reftype: note, the following line produces
+a reference to a void note label (since lblatend is not attached to a note)
+in formats that do not support the “line” reference type.
+This will make the Typst output with #ref uncompilable. -->
 What if you want to refer to the last line, i.e. [lblatend]{.tcrf reftype=line}?
 
 See [doubledlbl-beg->doubledlbl-end]{.tcrf  reftype="page"}.
diff --git a/text-crossrefs/test/sample-context-with-options.native b/text-crossrefs/test/sample-context-with-options.native
index 0c4e209..1d67c22 100644
--- a/text-crossrefs/test/sample-context-with-options.native
+++ b/text-crossrefs/test/sample-context-with-options.native
@@ -444,6 +444,9 @@
         , Span ( "lblatend" , [] , [] ) []
         ]
     ]
+, RawBlock
+    (Format "html")
+    "<!-- Because of tcrf-default-reftype: note, the following line produces\na reference to a void note label (since lblatend is not attached to a note)\nin formats that do not support the \8220line\8221 reference type.\nThis will make the Typst output with #ref uncompilable. -->"
 , Para
     [ Str "What"
     , Space
diff --git a/text-crossrefs/test/sample-latex-with-options.native b/text-crossrefs/test/sample-latex-with-options.native
index 609abd7..b68d3e7 100644
--- a/text-crossrefs/test/sample-latex-with-options.native
+++ b/text-crossrefs/test/sample-latex-with-options.native
@@ -441,6 +441,9 @@
         , Span ( "lblatend" , [] , [] ) []
         ]
     ]
+, RawBlock
+    (Format "html")
+    "<!-- Because of tcrf-default-reftype: note, the following line produces\na reference to a void note label (since lblatend is not attached to a note)\nin formats that do not support the \8220line\8221 reference type.\nThis will make the Typst output with #ref uncompilable. -->"
 , Para
     [ Str "What"
     , Space
diff --git a/text-crossrefs/test/sample-opendocument-with-options.native b/text-crossrefs/test/sample-opendocument-with-options.native
index ea43d4c..d0b4778 100644
--- a/text-crossrefs/test/sample-opendocument-with-options.native
+++ b/text-crossrefs/test/sample-opendocument-with-options.native
@@ -446,6 +446,9 @@
         , Span ( "lblatend" , [] , [] ) []
         ]
     ]
+, RawBlock
+    (Format "html")
+    "<!-- Because of tcrf-default-reftype: note, the following line produces\na reference to a void note label (since lblatend is not attached to a note)\nin formats that do not support the \8220line\8221 reference type.\nThis will make the Typst output with #ref uncompilable. -->"
 , Para
     [ Str "What"
     , Space
diff --git a/text-crossrefs/test/sample-typst-with-options.native b/text-crossrefs/test/sample-typst-with-options.native
index 89668a8..0783fa5 100644
--- a/text-crossrefs/test/sample-typst-with-options.native
+++ b/text-crossrefs/test/sample-typst-with-options.native
@@ -446,6 +446,9 @@
         , Span ( "lblatend" , [] , [] ) []
         ]
     ]
+, RawBlock
+    (Format "html")
+    "<!-- Because of tcrf-default-reftype: note, the following line produces\na reference to a void note label (since lblatend is not attached to a note)\nin formats that do not support the \8220line\8221 reference type.\nThis will make the Typst output with #ref uncompilable. -->"
 , Para
     [ Str "What"
     , Space