diff --git a/data-prepper-plugins/aws-lambda/README.md b/data-prepper-plugins/aws-lambda/README.md
index 099b390702..3df838491a 100644
--- a/data-prepper-plugins/aws-lambda/README.md
+++ b/data-prepper-plugins/aws-lambda/README.md
@@ -49,8 +49,33 @@ The following command runs the integration tests:
 -Dtests.lambda.processor.region="us-east-1" \
 -Dtests.lambda.processor.functionName="test-lambda-processor" \
 -Dtests.lambda.processor.sts_role_arn="arn:aws:iam::<>:role/lambda-role"
+```
 
-
+Lambda handler used to test:
+```
+def lambda_handler(event, context):
+    input_arr = event.get('osi_key', [])
+    output = []
+    if len(input_arr) == 1:
+        input = input_arr[0]
+        if "returnNone" in input:
+           return
+        if "returnString" in input:
+           return "RandomString"
+        if "returnObject" in input:
+            return input_arr[0]
+        if "returnEmptyArray" in input:
+            return output
+        if "returnNull" in input:
+            return "null"
+    for input in input_arr:
+        input["_out_"] = "transformed";
+        for k,v in input.items():
+            if type(v) is str:
+                input[k] = v.upper()
+        output.append(input)
+
+    return output
 ```
 
 
diff --git a/data-prepper-plugins/aws-lambda/src/integrationTest/java/org/opensearch/dataprepper/plugins/lambda/processor/LambdaProcessorIT.java b/data-prepper-plugins/aws-lambda/src/integrationTest/java/org/opensearch/dataprepper/plugins/lambda/processor/LambdaProcessorIT.java
index 5ea7115bbf..a9df9c4518 100644
--- a/data-prepper-plugins/aws-lambda/src/integrationTest/java/org/opensearch/dataprepper/plugins/lambda/processor/LambdaProcessorIT.java
+++ b/data-prepper-plugins/aws-lambda/src/integrationTest/java/org/opensearch/dataprepper/plugins/lambda/processor/LambdaProcessorIT.java
@@ -6,12 +6,21 @@
 
 import io.micrometer.core.instrument.Counter;
 import io.micrometer.core.instrument.Timer;
+import static org.hamcrest.CoreMatchers.equalTo;
+import static org.hamcrest.MatcherAssert.assertThat;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.ExtendWith;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.ValueSource;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.eq;
 import org.mockito.Mock;
+import static org.mockito.Mockito.doThrow;
+import static org.mockito.Mockito.lenient;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.when;
 import org.mockito.junit.jupiter.MockitoExtension;
 import org.mockito.junit.jupiter.MockitoSettings;
 import org.mockito.quality.Strictness;
@@ -50,16 +59,6 @@
 import java.util.concurrent.Executors;
 import java.util.concurrent.TimeUnit;
 
-import static org.hamcrest.CoreMatchers.equalTo;
-import static org.hamcrest.MatcherAssert.assertThat;
-import static org.mockito.ArgumentMatchers.any;
-import static org.mockito.ArgumentMatchers.eq;
-import static org.mockito.Mockito.doThrow;
-import static org.mockito.Mockito.lenient;
-import static org.mockito.Mockito.mock;
-import static org.mockito.Mockito.spy;
-import static org.mockito.Mockito.when;
-
 @ExtendWith(MockitoExtension.class)
 @MockitoSettings(strictness = Strictness.LENIENT)
 public class LambdaProcessorIT {
@@ -92,9 +91,12 @@ private LambdaProcessor createObjectUnderTest(LambdaProcessorConfig processorCon
 
     @BeforeEach
     public void setup() {
-        lambdaRegion = System.getProperty("tests.lambda.processor.region");
-        functionName = System.getProperty("tests.lambda.processor.functionName");
-        role = System.getProperty("tests.lambda.processor.sts_role_arn");
+//        lambdaRegion = System.getProperty("tests.lambda.processor.region");
+//        functionName = System.getProperty("tests.lambda.processor.functionName");
+//        role = System.getProperty("tests.lambda.processor.sts_role_arn");
+        lambdaRegion = "us-west-2";
+        functionName = "lambdaNoReturn";
+        role = "arn:aws:iam::176893235612:role/osis-lambda-role";
         pluginMetrics = mock(PluginMetrics.class);
         pluginSetting = mock(PluginSetting.class);
         when(pluginSetting.getPipelineName()).thenReturn("pipeline");
@@ -232,6 +234,39 @@ public void testWithFailureTags() throws Exception {
         }
     }
 
+    @ParameterizedTest
+    @ValueSource(strings = {"returnNull", "returnEmptyArray", "returnString"})
+    public void testAggregateMode_WithNullOrEmptyResponse(String input) {
+        when(lambdaProcessorConfig.getFunctionName()).thenReturn(functionName);
+        when(invocationType.getAwsLambdaValue()).thenReturn(InvocationType.REQUEST_RESPONSE.getAwsLambdaValue());
+        when(lambdaProcessorConfig.getResponseEventsMatch()).thenReturn(false);
+        when(lambdaProcessorConfig.getTagsOnFailure()).thenReturn(Collections.singletonList("lambda_failure"));
+        lambdaProcessor = createObjectUnderTest(lambdaProcessorConfig);
+        List<Record<Event>> records = createRecord(input);
+
+        Collection<Record<Event>> results = lambdaProcessor.doExecute(records);
+
+        assertThat("Drop events on null or empty response", results.isEmpty());
+    }
+
+    private List<Record<Event>> createRecord(String input) {
+        List<Record<Event>> records = new ArrayList<>();
+        Map<String, Object> map = new HashMap<>();
+        map.put(input, 42);
+        EventMetadata metadata = DefaultEventMetadata.builder()
+                .withEventType("event")
+                .build();
+        final Event event = JacksonEvent.builder()
+                .withData(map)
+                .withEventType("event")
+                .withEventMetadata(metadata)
+                .build();
+        records.add(new Record<>(event));
+
+        return records;
+    }
+
+
     private void validateResultsForAggregateMode(Collection<Record<Event>> results) {
         List<Record<Event>> resultRecords = new ArrayList<>(results);
         for (int i = 0; i < resultRecords.size(); i++) {