diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,21 @@
 
 ## [Unreleased]
 
+## 0.22.0.0 — 2026-10-27
+
+### Breaking Changes
+
+- Require the Kiroku Store 0.12 cohort from
+  mori://shinzui/kiroku/packages/kiroku-store; apply migration 0016 from
+  mori://shinzui/kiroku/packages/kiroku-store-migrations with affected workers
+  stopped, then restart new binaries before using namespace targets. Update
+  exhaustive subscription target/event matches and low-level record constructors.
+
+### New Features
+
+- Add `checkpointBenchmarkStore` for disposable serial benchmark preparation,
+  so a selected scenario can finish prior cluster checkpoint work before warm-up.
+
 ## 0.21.0.0 — 2026-10-14
 
 ### Other Changes
diff --git a/keiro-test-support.cabal b/keiro-test-support.cabal
--- a/keiro-test-support.cabal
+++ b/keiro-test-support.cabal
@@ -1,6 +1,6 @@
 cabal-version: 3.0
 name: keiro-test-support
-version: 0.21.0.0
+version: 0.22.0.0
 synopsis: Shared PostgreSQL test fixtures for Keiro test suites
 description:
   Suite-level ephemeral-PostgreSQL fixtures shared by the Keiro test
@@ -58,9 +58,9 @@
     ephemeral-pg >=0.3.1 && <0.4,
     hasql >=1.10 && <1.11,
     hasql-pool >=1.2 && <1.5,
-    keiro-migrations ^>=0.21.0.0,
-    kiroku-store ^>=0.11.0.0,
-    kiroku-store-migrations ^>=0.7.1.0,
+    keiro-migrations ^>=0.22.0.0,
+    kiroku-store ^>=0.12.0.0,
+    kiroku-store-migrations ^>=0.7.2.0,
     pg-migrate ^>=1.2.0.0,
     stm >=2.5 && <2.6,
     text >=2.1 && <2.2,
diff --git a/src/Keiro/Test/Postgres.hs b/src/Keiro/Test/Postgres.hs
--- a/src/Keiro/Test/Postgres.hs
+++ b/src/Keiro/Test/Postgres.hs
@@ -26,6 +26,7 @@
     withMigratedSuite,
     withMigratedSuiteWith,
     withMigratedBenchmarkSuite,
+    checkpointBenchmarkStore,
     withFreshDatabase,
     withFreshStore,
     withFreshStoreWith,
@@ -148,6 +149,13 @@
             )
             (\_ -> runSqlOn connection ("DROP DATABASE " <> quoteIdentifier template <> " WITH (FORCE)"))
             action
+
+-- | Finish prior cluster checkpoint work before warming a selected benchmark.
+-- This is a privileged, cluster-wide operation for disposable serial fixtures;
+-- it is not part of a measured command and changes no business rows.
+checkpointBenchmarkStore :: Store.KirokuStore -> IO ()
+checkpointBenchmarkStore store =
+  store `seq` (Pool.use store.pool (Session.script "CHECKPOINT") >>= either (fail . show) pure)
 
 withConfiguredSuite :: Pg.Config -> [MigrationComponent] -> (Fixture -> IO a) -> IO a
 withConfiguredSuite config extraComponents action = do