--- a/contrib/all-revsets.txt	Mon Jan 14 17:15:21 2019 +0100
+++ b/contrib/all-revsets.txt	Mon Jan 14 18:19:22 2019 +0100
@@ -147,3 +147,10 @@
 heads(matching(tip, "author"))
 heads(matching(tip, "author")) and -10000:-1
 (-10000:-1) and heads(matching(tip, "author"))
+# more roots testing
+roots(all())
+roots(-10000:-1)
+(-5000:-1000) and roots(-10000:-1)
+roots(matching(tip, "author"))
+roots(matching(tip, "author")) and -10000:-1
+(-10000:-1) and roots(matching(tip, "author"))