diff --git a/tests/42tags.pl b/tests/42tags.pl
index 5b2300738..90be751a3 100644
--- a/tests/42tags.pl
+++ b/tests/42tags.pl
@@ -176,6 +176,8 @@ sub matrix_list_tags
             return unless $event->{type} eq "m.tag"
                and $event->{room_id} eq $room_id;
 
+            log_if_fail "Tag event", $event;
+
             my %tags = %{ $event->{content}{tags} };
             keys %tags == 1 or die "Expected exactly one tag";
             defined $tags{test_tag} or die "Unexpected tag";