diff --git a/testdata/README.md b/testdata/README.md
index bbad070..8eb8364 100644
--- a/testdata/README.md
+++ b/testdata/README.md
@@ -16,7 +16,7 @@ These lists do *not* presently include operations/DIDs containing duplicate rota
               '-------<------------------<----'
 ```
 
-(all within 72h)
+(op2 follows op1 by more than 72h, ops3–7 all within 72h of op2)
 
 After operation 6, only op 4 would be nullified. After operation 7, all operations 2-6 will be nullified.
 
diff --git a/testdata/log_nullification_nontrivial.json b/testdata/log_nullification_nontrivial.json
index b40b9db..ce3b828 100644
--- a/testdata/log_nullification_nontrivial.json
+++ b/testdata/log_nullification_nontrivial.json
@@ -17,7 +17,7 @@
     },
     "cid": "bafyreiadih3ot3zecxp3yghygj2mwxh3szrrifwer2z4iodazbrtuvmmgm",
     "nullified": false,
-    "createdAt": "2025-07-25T14:14:48.962Z"
+    "createdAt": "2025-07-01T00:00:00.000Z"
   },
   {
     "did": "did:plc:ana7n2ppeqk57pay7azhjs24",
@@ -37,7 +37,7 @@
     },
     "cid": "bafyreieshd5ujokbnxfzqmaoyimbdsiuwklji2st7ffga2vkhsozxn324u",
     "nullified": false,
-    "createdAt": "2025-07-25T14:14:49.353Z"
+    "createdAt": "2025-07-1T00:00:01.000Z"
   },
   {
     "did": "did:plc:ana7n2ppeqk57pay7azhjs24",