diff --git a/forgetest/forgetest/campaign.py b/forgetest/forgetest/campaign.py
index 6514693..94b1fdc 100644
--- a/forgetest/forgetest/campaign.py
+++ b/forgetest/forgetest/campaign.py
@@ -70,6 +70,18 @@ def compute(records, tests, manifest, catalog_hash, running=None):
     campaign, last, closed_by, invalidate = open_campaign(records, manifest.content_sha, catalog_hash)
     epoch = invalidate.get("ts") if invalidate else None
     open_id = campaign.get("id") if campaign else None
+    # The invalidate record keeps its epoch for good: nothing older than it
+    # inherits. The page and the artifact report it only while it still asks
+    # for something, that is until a campaign has started after it.
+    invalidate_shown = invalidate
+    if invalidate:
+        seen = False
+        for r in records:
+            if r is invalidate:
+                seen = True
+            elif seen and r.get("t") == "campaign":
+                invalidate_shown = None
+                break
 
     by_test = {}
     for r in results:
@@ -151,7 +163,7 @@ def compute(records, tests, manifest, catalog_hash, running=None):
         "campaign": campaign,
         "last_campaign": last,
         "closed_by": closed_by,
-        "invalidate": invalidate,
+        "invalidate": invalidate_shown,
         "authorized": authorized,
         "counts": counts,
         "tests": out_tests,
diff --git a/forgetest/tests/test_campaign.py b/forgetest/tests/test_campaign.py
index d8b5195..74b5f71 100644
--- a/forgetest/tests/test_campaign.py
+++ b/forgetest/tests/test_campaign.py
@@ -157,10 +157,18 @@ class CampaignTests(unittest.TestCase):
             self.assertNotEqual(st["tests"][t.id]["status"], "inherited")
         # after the invalidate, a new campaign's passes count and later ones inherit again
         recs.append(rec_campaign("c2", self.man, self.chash, "2026-08-22T10:00:00Z"))
+        st = self.compute(recs)
+        # the campaign that started after it answers the invalidation: the
+        # page no longer announces it, while its epoch still holds
+        self.assertIsNone(st["invalidate"])
+        for t in self.tests:
+            self.assertTrue(st["tests"][t.id]["required"], t.id)
+            self.assertNotEqual(st["tests"][t.id]["status"], "inherited")
         for i, t in enumerate(self.tests):
             recs.append(rec_result("c2", t, self.man, "PASS", "2026-08-22T10:0%d:00Z" % (i + 1)))
         st = self.compute(recs)
         self.assertTrue(st["authorized"])
+        self.assertIsNone(st["invalidate"])
 
     def test_reset_and_catalog_change(self):
         recs = [rec_campaign("c1", self.man, self.chash, "2026-08-20T10:00:00Z"),