diff --git a/tests/t1300-ls.sh b/tests/t1300-ls.sh
index 9493533..1a69249 100755
--- a/tests/t1300-ls.sh
+++ b/tests/t1300-ls.sh
@@ -53,6 +53,18 @@ test_todo_session 'checking TODOTXT_FINAL_FILTER' <<EOF
 TODO: 3 of 3 tasks shown
 EOF
 
+#
+# check the custom hiding
+#
+test_todo_session 'checking HIDE_CUSTOM_SUBSTITUTION' <<EOF
+>>> HIDE_CUSTOM_SUBSTITUTION='[tT]h' todo.sh ls
+2 aaa zzz is line should be first.
+3 bbb yyy is line should be second.
+1 ccc xxx is line should be ird.
+--
+TODO: 3 of 3 tasks shown
+EOF
+
 #
 # check the filtering of TERM
 #
diff --git a/todo.sh b/todo.sh
index 5d03eb0..f63b34d 100755
--- a/todo.sh
+++ b/todo.sh
@@ -821,6 +821,7 @@ _list() {
         | sed '''
             s/'"${HIDE_PROJECTS_SUBSTITUTION:-^}"'//g
             s/'"${HIDE_CONTEXTS_SUBSTITUTION:-^}"'//g
+            s/'"${HIDE_CUSTOM_SUBSTITUTION:-^}"'//g
           '''                                                   \
         | eval ${TODOTXT_FINAL_FILTER}                          \
     )