diff --git a/instrumentation/openai/openai-java-1.1/testing/src/main/java/io/opentelemetry/instrumentation/openai/v1_1/AbstractChatTest.java b/instrumentation/openai/openai-java-1.1/testing/src/main/java/io/opentelemetry/instrumentation/openai/v1_1/AbstractChatTest.java
index 315e6c62d753..b8ee95c14b85 100644
--- a/instrumentation/openai/openai-java-1.1/testing/src/main/java/io/opentelemetry/instrumentation/openai/v1_1/AbstractChatTest.java
+++ b/instrumentation/openai/openai-java-1.1/testing/src/main/java/io/opentelemetry/instrumentation/openai/v1_1/AbstractChatTest.java
@@ -63,6 +63,7 @@
 import io.opentelemetry.api.trace.SpanContext;
 import io.opentelemetry.context.Context;
 import io.opentelemetry.instrumentation.openai.TestHelper;
+import io.opentelemetry.instrumentation.testing.internal.AutoCleanupExtension;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
@@ -73,8 +74,10 @@
 import java.util.concurrent.CompletionException;
 import java.util.stream.Collectors;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.RegisterExtension;
 
 public abstract class AbstractChatTest extends AbstractOpenAiTest {
+
   protected static final AttributeKey<String> EVENT_NAME = AttributeKey.stringKey("event.name");
 
   protected static final String TEST_CHAT_MODEL = "gpt-4o-mini";
@@ -82,6 +85,8 @@ public abstract class AbstractChatTest extends AbstractOpenAiTest {
   protected static final String TEST_CHAT_INPUT =
       "Answer in up to 3 words: Which ocean contains Bouvet Island?";
 
+  @RegisterExtension static final AutoCleanupExtension cleanup = AutoCleanupExtension.create();
+
   protected final ChatCompletion doCompletions(ChatCompletionCreateParams params) {
     return doCompletions(params, getClient(), getClientAsync());
   }
@@ -878,6 +883,8 @@ void connectionError() {
                 .apiKey("testing")
                 .maxRetries(0)
                 .build());
+    cleanup.deferCleanup(client::close);
+    cleanup.deferCleanup(clientAsync::close);
 
     ChatCompletionCreateParams params =
         ChatCompletionCreateParams.builder()
@@ -1583,6 +1590,8 @@ void streamConnectionError() {
                 .apiKey("testing")
                 .maxRetries(0)
                 .build());
+    cleanup.deferCleanup(client::close);
+    cleanup.deferCleanup(clientAsync::close);
 
     ChatCompletionCreateParams params =
         ChatCompletionCreateParams.builder()