diff --git a/muted-tests.yml b/muted-tests.yml
index 3f2159114a6a..1cb05eca62bb 100644
--- a/muted-tests.yml
+++ b/muted-tests.yml
@@ -396,9 +396,6 @@ tests:
 - class: org.elasticsearch.xpack.remotecluster.CrossClusterEsqlRCS2EnrichUnavailableRemotesIT
   method: testEsqlEnrichWithSkipUnavailable
   issue: https://github.com/elastic/elasticsearch/issues/127368
-- class: org.elasticsearch.xpack.esql.heap_attack.HeapAttackIT
-  method: testLookupExplosionNoFetch
-  issue: https://github.com/elastic/elasticsearch/issues/127365
 - class: org.elasticsearch.xpack.test.rest.XPackRestIT
   method: test {p0=ml/data_frame_analytics_cat_apis/Test cat data frame analytics all jobs with header}
   issue: https://github.com/elastic/elasticsearch/issues/127625
diff --git a/test/external-modules/esql-heap-attack/src/javaRestTest/java/org/elasticsearch/xpack/esql/heap_attack/HeapAttackIT.java b/test/external-modules/esql-heap-attack/src/javaRestTest/java/org/elasticsearch/xpack/esql/heap_attack/HeapAttackIT.java
index e168f12e648e..3912a63ef151 100644
--- a/test/external-modules/esql-heap-attack/src/javaRestTest/java/org/elasticsearch/xpack/esql/heap_attack/HeapAttackIT.java
+++ b/test/external-modules/esql-heap-attack/src/javaRestTest/java/org/elasticsearch/xpack/esql/heap_attack/HeapAttackIT.java
@@ -655,7 +655,7 @@ public class HeapAttackIT extends ESRestTestCase {
     }
 
     public void testLookupExplosionNoFetch() throws IOException {
-        int sensorDataCount = 7000;
+        int sensorDataCount = 6000;
         int lookupEntries = 10000;
         Map<?, ?> map = lookupExplosionNoFetch(sensorDataCount, lookupEntries);
         assertMap(map, matchesMap().extraOk().entry("values", List.of(List.of(sensorDataCount * lookupEntries))));