diff --git a/muted-tests.yml b/muted-tests.yml
index 8c0967aa83b3b..cc9421439b992 100644
--- a/muted-tests.yml
+++ b/muted-tests.yml
@@ -498,9 +498,6 @@ tests:
 - class: org.elasticsearch.search.CCSDuelIT
   method: testTermsAggsWithProfile
   issue: https://github.com/elastic/elasticsearch/issues/132880
-- class: org.elasticsearch.index.mapper.LongFieldMapperTests
-  method: testFetchMany
-  issue: https://github.com/elastic/elasticsearch/issues/132948
 - class: org.elasticsearch.index.mapper.LongFieldMapperTests
   method: testFetch
   issue: https://github.com/elastic/elasticsearch/issues/132956
diff --git a/server/src/test/java/org/elasticsearch/index/mapper/LongFieldMapperTests.java b/server/src/test/java/org/elasticsearch/index/mapper/LongFieldMapperTests.java
index e531034f0725e..a9330955b5e70 100644
--- a/server/src/test/java/org/elasticsearch/index/mapper/LongFieldMapperTests.java
+++ b/server/src/test/java/org/elasticsearch/index/mapper/LongFieldMapperTests.java
@@ -10,11 +10,13 @@
 package org.elasticsearch.index.mapper;
 
 import org.elasticsearch.common.bytes.BytesArray;
+import org.elasticsearch.datageneration.FieldType;
 import org.elasticsearch.script.LongFieldScript;
 import org.elasticsearch.script.Script;
 import org.elasticsearch.script.ScriptContext;
 import org.elasticsearch.xcontent.XContentBuilder;
 import org.elasticsearch.xcontent.XContentType;
+import org.junit.Before;
 
 import java.io.IOException;
 import java.math.BigInteger;
@@ -26,6 +28,15 @@
 
 public class LongFieldMapperTests extends WholeNumberFieldMapperTests {
 
+    private FieldType fieldType;
+
+    @Before
+    public void pickNumberType() {
+        // randomly select between long and double to use for generating random numbers
+        boolean shouldUseLong = randomBoolean();
+        fieldType = shouldUseLong ? FieldType.LONG : FieldType.DOUBLE;
+    }
+
     @Override
     protected Number missingValue() {
         return 123L;
@@ -45,7 +56,7 @@ protected List<NumberTypeOutOfRangeSpec> outOfRangeSpecs() {
 
     @Override
     protected void minimalMapping(XContentBuilder b) throws IOException {
-        b.field("type", "long");
+        b.field("type", fieldType.toString());
     }
 
     @Override
@@ -105,7 +116,8 @@ public void testLongIndexingCoercesIntoRange() throws Exception {
 
     @Override
     protected Number randomNumber() {
-        if (randomBoolean()) {
+        // we must be consistent with the type of each number that we generate
+        if (fieldType.equals(FieldType.LONG)) {
             return randomLong();
         }
         if (randomBoolean()) {