diff --git a/src/controller/testsuite/test_persist_truncate.c b/src/controller/testsuite/test_persist_truncate.c
index 56750a1..4125700 100644
--- a/src/controller/testsuite/test_persist_truncate.c
+++ b/src/controller/testsuite/test_persist_truncate.c
@@ -335,6 +335,16 @@ static void test_truncate_above_resolves_pending_continuations_as_failed(void)
         "truncation -- only entries strictly above the new tail were "
         "removed from the log");
 
+    /* bug-1452: persist_stop() MUST run before commit_engine_fini() -- the
+     * fsync_worker flusher thread is still live here and can be mid-flight
+     * calling the durable-advance callback (commit.c's fsync_worker ->
+     * commit_on_durable_advance -> commit_advance_locked) with NO lock held.
+     * commit_engine_fini() destroys ce->lock/ce->cond and nulls ce->p; racing
+     * that against a still-running flusher lets commit_advance_locked observe
+     * ce->p go NULL between its own guard check and its dereference -> SEGV.
+     * persist_stop() joins the flusher thread first, so by the time
+     * commit_engine_fini() runs, nothing can call back into ce. */
+    persist_stop(p);
     commit_engine_fini(&ce);
     teardown_persist(p);
     printf("test_truncate_above_resolves_pending_continuations_as_failed: PASS\n");
@@ -371,6 +381,9 @@ static void test_truncate_noop_does_not_resolve_pending_continuations(void)
         "a no-op truncate (nothing above cutoff_lsn) must not resolve any "
         "pending continuation");
 
+    /* bug-1452: stop the flusher thread before tearing down ce -- see the
+     * comment in test_truncate_above_resolves_pending_continuations_as_failed. */
+    persist_stop(p);
     commit_engine_fini(&ce);
     teardown_persist(p);
     printf("test_truncate_noop_does_not_resolve_pending_continuations: PASS\n");
@@ -482,6 +495,9 @@ static void test_truncate_concurrent_burst_resolves_above_cutoff_exactly_once(vo
         "only the above-cutoff admission slots are released by truncation; "
         "the below-cutoff ones remain pending");
 
+    /* bug-1452: stop the flusher thread before tearing down ce -- see the
+     * comment in test_truncate_above_resolves_pending_continuations_as_failed. */
+    persist_stop(p);
     commit_engine_fini(&ce);
     teardown_persist(p);
     printf("test_truncate_concurrent_burst_resolves_above_cutoff_exactly_once: "