diff -r 265f30e3c50d -r 353e546ab324 tests/test-evolve-obshistory-amend-then-fold.t
--- a/tests/test-evolve-obshistory-amend-then-fold.t	Sat Feb 01 10:54:20 2020 +0100
+++ b/tests/test-evolve-obshistory-amend-then-fold.t	Fri Dec 27 20:38:10 2019 -0800
@@ -167,7 +167,9 @@
                       *, (glob)
                       "content"
                   ],
+                  "nodetype": "precursor",
                   "operation": "fold",
+                  "precnode": "b7ea6d14e664bdc8922221f7992631b50da3fb07",
                   "succnodes": [
                       "eb5a0daa21923bbf8caeb2c42085b9e463861fd0"
                   ],
@@ -188,7 +190,9 @@
                   "effects": [
                       "description"
                   ],
+                  "nodetype": "precursor",
                   "operation": "amend",
+                  "precnode": "0dec01379d3be6318c470ead31b1fe7ae7cb53d5",
                   "succnodes": [
                       "b7ea6d14e664bdc8922221f7992631b50da3fb07"
                   ],
@@ -210,7 +214,9 @@
                       "description",
                       "content"
                   ],
+                  "nodetype": "precursor",
                   "operation": "fold",
+                  "precnode": "471f378eab4c5e25f6c77f785b27c936efb22874",
                   "succnodes": [
                       "eb5a0daa21923bbf8caeb2c42085b9e463861fd0"
                   ],