diff --git a/.github/workflows/oracle-nightly.yml b/.github/workflows/oracle-nightly.yml
index b93bf13492..c9edecb608 100644
--- a/.github/workflows/oracle-nightly.yml
+++ b/.github/workflows/oracle-nightly.yml
@@ -27,6 +27,8 @@ jobs:
           persist-credentials: false
       - name: Setup Tools
         uses: tanstack/config/.github/setup@e4b48f16568324f76f467aa4c2aac2f05db632c3
+      - name: Build dependencies
+        run: node scripts/ci-tests.mjs build sqlite-core
       - name: Run the generated campaign with a larger budget
         env:
           TANSTACK_DB_ORACLE_RUNS_MULTIPLIER: '10'
diff --git a/packages/db-sqlite-persistence-core/tests/persisted-demand-coverage-campaign-oracle.test.ts b/packages/db-sqlite-persistence-core/tests/persisted-demand-coverage-campaign-oracle.test.ts
index 257f112e13..cada689a62 100644
--- a/packages/db-sqlite-persistence-core/tests/persisted-demand-coverage-campaign-oracle.test.ts
+++ b/packages/db-sqlite-persistence-core/tests/persisted-demand-coverage-campaign-oracle.test.ts
@@ -1134,6 +1134,9 @@ const PROPERTY = `persisted-demand-coverage.history`
 const REQUIRED_PROPERTY = `persisted-demand-coverage.required`
 const RUNS = 40
 const REQUIRED_RUNS = 2
+// Nightly scales both history budgets; allow the same time per history while
+// keeping ordinary PR and replay runs bounded by the existing three minutes.
+const campaignTimeoutMs = oracleRuns(180_000)
 const REACH_STATES: ReadonlyArray<CoverageReach> = [
   `covered offline`,
   `uncovered offline`,
@@ -1448,7 +1451,7 @@ describe(`persisted demand coverage over generated histories`, () => {
       quietConsole()
       await campaign({ seed: 2102, numRuns: oracleRuns(RUNS) })
     },
-    180_000,
+    campaignTimeoutMs,
   )
 
   it.skipIf(oracleReplaySkips(PROPERTY, REQUIRED_PROPERTY))(
@@ -1457,6 +1460,6 @@ describe(`persisted demand coverage over generated histories`, () => {
       quietConsole()
       await campaign(oraclePropertyOptions(RUNS, PROPERTY))
     },
-    180_000,
+    campaignTimeoutMs,
   )
 })
diff --git a/scripts/demand-coverage-mutants.mjs b/scripts/demand-coverage-mutants.mjs
index 49d3bda754..98aa293697 100644
--- a/scripts/demand-coverage-mutants.mjs
+++ b/scripts/demand-coverage-mutants.mjs
@@ -200,8 +200,8 @@ const MUTANTS = [
   {
     id: 'P22',
     file: 'packages/db-sqlite-persistence-core/src/persisted.ts',
-    find: '      options.signal?.addEventListener(`abort`, settle, { once: true })\n',
-    replace: '',
+    find: '      options.signal?.addEventListener(`abort`, settle, { once: true })\n      void upstream.catch(() => undefined).then(settle)',
+    replace: '      void upstream.catch(() => undefined).then(settle)',
     rationale: 'settleCoveredDemand: release does not end the covered wait',
   },
   {