diff --git a/muted-tests.yml b/muted-tests.yml
index cac83afc002f4..7a36148d2dcb7 100644
--- a/muted-tests.yml
+++ b/muted-tests.yml
@@ -151,9 +151,6 @@ tests:
 - class: org.elasticsearch.xpack.ml.integration.MlJobIT
   method: testGetJob_GivenNoSuchJob
   issue: https://github.com/elastic/elasticsearch/issues/112730
-- class: org.elasticsearch.script.StatsSummaryTests
-  method: testEqualsAndHashCode
-  issue: https://github.com/elastic/elasticsearch/issues/112439
 - class: org.elasticsearch.xpack.ml.integration.MlJobIT
   method: testDeleteJobAfterMissingAliases
   issue: https://github.com/elastic/elasticsearch/issues/112823
diff --git a/server/src/test/java/org/elasticsearch/script/StatsSummaryTests.java b/server/src/test/java/org/elasticsearch/script/StatsSummaryTests.java
index 9cfa586de11ab..1e3fdb4e6a9ff 100644
--- a/server/src/test/java/org/elasticsearch/script/StatsSummaryTests.java
+++ b/server/src/test/java/org/elasticsearch/script/StatsSummaryTests.java
@@ -75,9 +75,21 @@ public void testEqualsAndHashCode() {
         assertThat(stats1, equalTo(stats2));
         assertThat(stats1.hashCode(), equalTo(stats2.hashCode()));
 
+        // Accumulators with same sum, but different counts are not equals
+        stats1.accept(1);
+        stats1.accept(1);
+        stats2.accept(2);
+        assertThat(stats1.getSum(), equalTo(stats2.getSum()));
+        assertThat(stats1.getCount(), not(equalTo(stats2.getCount())));
+        assertThat(stats1, not(equalTo(stats2)));
+        assertThat(stats1.hashCode(), not(equalTo(stats2.hashCode())));
+
         // Accumulators with different values are not equals
-        randomDoubles(randomIntBetween(0, 20)).forEach(stats1);
-        randomDoubles(randomIntBetween(0, 20)).forEach(stats2);
+        stats1.reset();
+        stats2.reset();
+        randomDoubles(randomIntBetween(1, 20)).forEach(stats1.andThen(v -> stats2.accept(v + randomDoubleBetween(0.0, 1.0, false))));
+        assertThat(stats1.getCount(), equalTo(stats2.getCount()));
+        assertThat(stats1.getSum(), not(equalTo(stats2.getSum())));
         assertThat(stats1, not(equalTo(stats2)));
         assertThat(stats1.hashCode(), not(equalTo(stats2.hashCode())));
     }