diff --git a/.config/nextest.toml b/.config/nextest.toml
index 8eb68deaf..b8ed8e626 100644
--- a/.config/nextest.toml
+++ b/.config/nextest.toml
@@ -89,6 +89,29 @@ test-group = 'ecstore-serial-flaky'
 filter = 'package(rustfs-ecstore) & test(/^set_disk::ops::multipart::tests::crash_consistency::/)'
 test-group = 'ecstore-serial-flaky'
 
+# Serialize the heal result-report tests. Every test in the module builds a
+# real-disk (TempDir-backed) hermetic erasure set and drives MiB-scale writes
+# plus deep-scan heal — the same load-sensitive cross-disk IO shape as the
+# crash_consistency scenarios above. Under a heavily parallel run a single
+# disk's IO can fail while write quorum still holds, which flips per-disk
+# readback and aggregate-outcome assertions nondeterministically (different
+# tests each round; all pass standalone). Preventive serialization only, no
+# retries. The matching ci-profile override is after [profile.ci].
+[[profile.default.overrides]]
+filter = 'package(rustfs-ecstore) & test(/^set_disk::ops::heal::heal_result_report_tests::/)'
+test-group = 'ecstore-serial-flaky'
+
+# Serialize the metadata-cache generation-retirement pair. Both carry
+# #[serial(metadata_cache_invalidation_probe)] — a no-op across nextest's
+# process boundary — and assert get_object_metadata_cache generation
+# semantics on a 4-disk hermetic set, the same load-sensitive shape that
+# forced the transition matrix tests into this group. Preventive
+# serialization only, no retries. The matching ci-profile override is after
+# [profile.ci].
+[[profile.default.overrides]]
+filter = 'package(rustfs-ecstore) & test(retires_cached_snapshot)'
+test-group = 'ecstore-serial-flaky'
+
 # The production-handler relocation regression builds an isolated 8-disk,
 # 2-pool store and commits a 72 MiB multipart object. Keep that cross-disk IO
 # from overlapping the ecstore commit fixtures above.
@@ -250,6 +273,20 @@ test-group = 'e2e-reliability'
 filter = 'package(rustfs-ecstore) & test(/^set_disk::ops::multipart::tests::crash_consistency::/)'
 test-group = 'ecstore-serial-flaky'
 
+# Serialize the heal result-report tests under the ci profile too (see the
+# matching default-profile override near the top). Not a quarantine: no
+# retries, just serialized real-disk heal IO.
+[[profile.ci.overrides]]
+filter = 'package(rustfs-ecstore) & test(/^set_disk::ops::heal::heal_result_report_tests::/)'
+test-group = 'ecstore-serial-flaky'
+
+# Serialize the metadata-cache generation-retirement pair under the ci
+# profile too (see the matching default-profile override near the top). Not a
+# quarantine: no retries.
+[[profile.ci.overrides]]
+filter = 'package(rustfs-ecstore) & test(retires_cached_snapshot)'
+test-group = 'ecstore-serial-flaky'
+
 # Match the default-profile embedded test isolation without quarantining or
 # retrying failures in CI.
 [[profile.ci.overrides]]
diff --git a/crates/ecstore/src/core/pools.rs b/crates/ecstore/src/core/pools.rs
index e8f257433..dbafa91f1 100644
--- a/crates/ecstore/src/core/pools.rs
+++ b/crates/ecstore/src/core/pools.rs
@@ -7420,6 +7420,9 @@ type DecommissionCapacityInfoOverrides =
 #[cfg(test)]
 static DECOMMISSION_CAPACITY_INFO_OVERRIDES: std::sync::OnceLock<DecommissionCapacityInfoOverrides> = std::sync::OnceLock::new();
 
+/// Queues capacity snapshots consumed in order by `get_decommission_all_pool_capacity_infos`;
+/// the final snapshot is retained and replayed for every subsequent sample, so tests never
+/// fall back to the host's real disk statistics once an override is installed.
 #[cfg(test)]
 pub(crate) fn set_decommission_capacity_info_overrides_for_test(
     store_id: uuid::Uuid,
@@ -7438,11 +7441,15 @@ fn take_decommission_capacity_info_override_for_test(store_id: uuid::Uuid) -> Op
         .get_or_init(|| std::sync::Mutex::new(HashMap::new()))
         .lock()
         .expect("decommission capacity info override should not be poisoned");
-    let snapshot = overrides.get_mut(&store_id)?.pop_front();
-    if overrides.get(&store_id).is_some_and(std::collections::VecDeque::is_empty) {
-        overrides.remove(&store_id);
+    let queue = overrides.get_mut(&store_id)?;
+    if queue.len() > 1 {
+        queue.pop_front()
+    } else {
+        // The final snapshot is replayed forever: extra sampling points added to
+        // the decommission paths must keep observing injected capacity instead of
+        // silently falling back to the host's real statfs numbers (see #6989).
+        queue.front().cloned()
     }
-    snapshot
 }
 
 #[cfg(test)]