--- a/tests/test-mv-cp-st-diff.t Tue Oct 02 17:34:34 2018 -0700
+++ b/tests/test-mv-cp-st-diff.t Fri Sep 07 11:16:06 2018 -0400
@@ -1666,4 +1666,18 @@
@@ -0,0 +1,1 @@
+change
+Check debug output for copy tracing
+
+ $ hg status --copies --rev 'desc(dev)' --rev . --config devel.debug.copies=yes --debug
+ debug.copies: searching copies from a51f36ab1704 to 7935fd48a8f9
+ debug.copies: search mode: forward
+ debug.copies: looking into rename from a51f36ab1704 to 7935fd48a8f9
+ debug.copies: search limit: 2
+ debug.copies: missing file to search: 1
+ debug.copies: tracing file: renamed
+ debug.copies: rename of: f
+ A renamed
+ f
+ R f
+
$ cd ..