diff --git a/instrumentation/elasticsearch/elasticsearch-api-client-7.16/javaagent/build.gradle.kts b/instrumentation/elasticsearch/elasticsearch-api-client-7.16/javaagent/build.gradle.kts
index 01e2416df29d..1a1cca49c0aa 100644
--- a/instrumentation/elasticsearch/elasticsearch-api-client-7.16/javaagent/build.gradle.kts
+++ b/instrumentation/elasticsearch/elasticsearch-api-client-7.16/javaagent/build.gradle.kts
@@ -22,6 +22,8 @@ dependencies {
 
   testImplementation("com.fasterxml.jackson.core:jackson-databind:2.14.2")
   testImplementation("org.testcontainers:elasticsearch")
+
+  latestDepTestLibrary("co.elastic.clients:elasticsearch-java:8.0.+")
 }
 
 tasks {
diff --git a/instrumentation/reactor/reactor-kafka-1.0/javaagent/build.gradle.kts b/instrumentation/reactor/reactor-kafka-1.0/javaagent/build.gradle.kts
index 68a9b40d28a1..43af8a95939b 100644
--- a/instrumentation/reactor/reactor-kafka-1.0/javaagent/build.gradle.kts
+++ b/instrumentation/reactor/reactor-kafka-1.0/javaagent/build.gradle.kts
@@ -22,9 +22,9 @@ dependencies {
   implementation(project(":instrumentation:kafka:kafka-clients:kafka-clients-common:library"))
   implementation(project(":instrumentation:reactor:reactor-3.1:library"))
 
-  // using 1.3.0 to be able to implement several new KafkaReceiver methods added in 1.3.3
+  // using 1.3 to be able to implement several new KafkaReceiver methods added in 1.3.3 and 1.3.21
   // @NoMuzzle is used to ensure that this does not break muzzle checks
-  compileOnly("io.projectreactor.kafka:reactor-kafka:1.3.3")
+  compileOnly("io.projectreactor.kafka:reactor-kafka:1.3.21")
 
   testInstrumentation(project(":instrumentation:kafka:kafka-clients:kafka-clients-0.11:javaagent"))
   testInstrumentation(project(":instrumentation:reactor:reactor-3.1:javaagent"))
@@ -60,6 +60,27 @@ testing {
         }
       }
     }
+
+    val testV1_3_21 by registering(JvmTestSuite::class) {
+      dependencies {
+        implementation(project(":instrumentation:reactor:reactor-kafka-1.0:testing"))
+
+        if (testLatestDeps) {
+          implementation("io.projectreactor.kafka:reactor-kafka:+")
+          implementation("io.projectreactor:reactor-core:3.4.+")
+        } else {
+          implementation("io.projectreactor.kafka:reactor-kafka:1.3.21")
+        }
+      }
+
+      targets {
+        all {
+          testTask.configure {
+            systemProperty("hasConsumerGroupAndId", true)
+          }
+        }
+      }
+    }
   }
 }
 
diff --git a/instrumentation/reactor/reactor-kafka-1.0/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/reactor/kafka/v1_0/InstrumentedKafkaReceiver.java b/instrumentation/reactor/reactor-kafka-1.0/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/reactor/kafka/v1_0/InstrumentedKafkaReceiver.java
index 62b827f2fdf7..a8342732177d 100644
--- a/instrumentation/reactor/reactor-kafka-1.0/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/reactor/kafka/v1_0/InstrumentedKafkaReceiver.java
+++ b/instrumentation/reactor/reactor-kafka-1.0/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/reactor/kafka/v1_0/InstrumentedKafkaReceiver.java
@@ -25,7 +25,7 @@ public InstrumentedKafkaReceiver(KafkaReceiver<K, V> actual) {
   // added in 1.3.3
   @Override
   public Flux<ReceiverRecord<K, V>> receive(Integer prefetch) {
-    return wrap(KafkaReceiver133Access.receive(actual, prefetch));
+    return wrap(KafkaReceiver13Access.receive(actual, prefetch));
   }
 
   @Override
@@ -36,7 +36,7 @@ public Flux<ReceiverRecord<K, V>> receive() {
   // added in 1.3.3
   @Override
   public Flux<Flux<ConsumerRecord<K, V>>> receiveAutoAck(Integer prefetch) {
-    return KafkaReceiver133Access.receiveAutoAck(actual, prefetch)
+    return KafkaReceiver13Access.receiveAutoAck(actual, prefetch)
         .map(InstrumentedKafkaReceiver::wrap);
   }
 
@@ -48,7 +48,7 @@ public Flux<Flux<ConsumerRecord<K, V>>> receiveAutoAck() {
   // added in 1.3.3
   @Override
   public Flux<ConsumerRecord<K, V>> receiveAtmostOnce(Integer prefetch) {
-    return wrap(KafkaReceiver133Access.receiveAtmostOnce(actual, prefetch));
+    return wrap(KafkaReceiver13Access.receiveAtmostOnce(actual, prefetch));
   }
 
   @Override
@@ -66,7 +66,7 @@ public Flux<Flux<ConsumerRecord<K, V>>> receiveExactlyOnce(
   @Override
   public Flux<Flux<ConsumerRecord<K, V>>> receiveExactlyOnce(
       TransactionManager transactionManager, Integer prefetch) {
-    return KafkaReceiver133Access.receiveExactlyOnce(actual, transactionManager, prefetch)
+    return KafkaReceiver13Access.receiveExactlyOnce(actual, transactionManager, prefetch)
         .map(InstrumentedKafkaReceiver::wrap);
   }
 
@@ -75,6 +75,19 @@ public <T> Mono<T> doOnConsumer(Function<Consumer<K, V>, ? extends T> function)
     return actual.doOnConsumer(function);
   }
 
+  // added in 1.3.21
+  @Override
+  public Flux<Flux<ReceiverRecord<K, V>>> receiveBatch(Integer prefetch) {
+    return KafkaReceiver13Access.receiveBatch(actual, prefetch)
+        .map(InstrumentedKafkaReceiver::wrap);
+  }
+
+  // added in 1.3.21
+  @Override
+  public Flux<Flux<ReceiverRecord<K, V>>> receiveBatch() {
+    return KafkaReceiver13Access.receiveBatch(actual).map(InstrumentedKafkaReceiver::wrap);
+  }
+
   private static <K, V, R extends ConsumerRecord<K, V>> Flux<R> wrap(Flux<R> flux) {
     return flux instanceof InstrumentedKafkaFlux ? flux : new InstrumentedKafkaFlux<>(flux);
   }
diff --git a/instrumentation/reactor/reactor-kafka-1.0/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/reactor/kafka/v1_0/KafkaReceiver133Access.java b/instrumentation/reactor/reactor-kafka-1.0/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/reactor/kafka/v1_0/KafkaReceiver13Access.java
similarity index 75%
rename from instrumentation/reactor/reactor-kafka-1.0/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/reactor/kafka/v1_0/KafkaReceiver133Access.java
rename to instrumentation/reactor/reactor-kafka-1.0/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/reactor/kafka/v1_0/KafkaReceiver13Access.java
index 2e21f39d8829..de50fa9b353e 100644
--- a/instrumentation/reactor/reactor-kafka-1.0/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/reactor/kafka/v1_0/KafkaReceiver133Access.java
+++ b/instrumentation/reactor/reactor-kafka-1.0/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/reactor/kafka/v1_0/KafkaReceiver13Access.java
@@ -12,7 +12,7 @@
 import reactor.kafka.receiver.ReceiverRecord;
 import reactor.kafka.sender.TransactionManager;
 
-final class KafkaReceiver133Access {
+final class KafkaReceiver13Access {
 
   @NoMuzzle
   static <K, V> Flux<ReceiverRecord<K, V>> receive(KafkaReceiver<K, V> receiver, Integer prefetch) {
@@ -37,5 +37,16 @@ static <K, V> Flux<Flux<ConsumerRecord<K, V>>> receiveExactlyOnce(
     return receiver.receiveExactlyOnce(transactionManager, prefetch);
   }
 
-  private KafkaReceiver133Access() {}
+  @NoMuzzle
+  static <K, V> Flux<Flux<ReceiverRecord<K, V>>> receiveBatch(
+      KafkaReceiver<K, V> receiver, Integer prefetch) {
+    return receiver.receiveBatch(prefetch);
+  }
+
+  @NoMuzzle
+  static <K, V> Flux<Flux<ReceiverRecord<K, V>>> receiveBatch(KafkaReceiver<K, V> receiver) {
+    return receiver.receiveBatch();
+  }
+
+  private KafkaReceiver13Access() {}
 }
diff --git a/instrumentation/reactor/reactor-kafka-1.0/javaagent/src/testV1_3_21/java/io/opentelemetry/javaagent/instrumentation/reactor/kafka/v1_0/ReactorKafka1321InstrumentationTest.java b/instrumentation/reactor/reactor-kafka-1.0/javaagent/src/testV1_3_21/java/io/opentelemetry/javaagent/instrumentation/reactor/kafka/v1_0/ReactorKafka1321InstrumentationTest.java
new file mode 100644
index 000000000000..c146c009cb5f
--- /dev/null
+++ b/instrumentation/reactor/reactor-kafka-1.0/javaagent/src/testV1_3_21/java/io/opentelemetry/javaagent/instrumentation/reactor/kafka/v1_0/ReactorKafka1321InstrumentationTest.java
@@ -0,0 +1,33 @@
+/*
+ * Copyright The OpenTelemetry Authors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package io.opentelemetry.javaagent.instrumentation.reactor.kafka.v1_0;
+
+import org.junit.jupiter.api.Test;
+
+class ReactorKafka1321InstrumentationTest extends AbstractReactorKafkaTest {
+
+  @Test
+  void receiveBatch() {
+    testSingleRecordProcess(
+        recordConsumer ->
+            receiver
+                .receiveBatch()
+                .concatMap(r -> r)
+                .doOnNext(r -> r.receiverOffset().acknowledge())
+                .subscribe(recordConsumer));
+  }
+
+  @Test
+  void receiveBatchWithSize() {
+    testSingleRecordProcess(
+        recordConsumer ->
+            receiver
+                .receiveBatch(1)
+                .concatMap(r -> r)
+                .doOnNext(r -> r.receiverOffset().acknowledge())
+                .subscribe(recordConsumer));
+  }
+}