diff --git a/sdk-extensions/testbed/build.gradle b/sdk-extensions/testbed/build.gradle
index b17b022521..f25c53efad 100644
--- a/sdk-extensions/testbed/build.gradle
+++ b/sdk-extensions/testbed/build.gradle
@@ -8,8 +8,8 @@ description = 'OpenTelemetry SDK Testbed'
 ext.moduleName = 'io.opentelemetry.sdk.extension.trace.testbed'
 
 dependencies {
-    implementation project(':opentelemetry-api'),
+    testImplementation project(':opentelemetry-api'),
             project(':opentelemetry-sdk'),
-            project(':opentelemetry-exporter-inmemory'),
+            project(':opentelemetry-sdk-testing'),
             libraries.guava
 }
diff --git a/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/TestUtils.java b/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/TestUtils.java
index b2e33aad23..c946302636 100644
--- a/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/TestUtils.java
+++ b/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/TestUtils.java
@@ -9,7 +9,7 @@ import static org.assertj.core.api.Assertions.assertThat;
 
 import io.opentelemetry.api.common.AttributeKey;
 import io.opentelemetry.api.trace.Span.Kind;
-import io.opentelemetry.exporters.inmemory.InMemorySpanExporter;
+import io.opentelemetry.sdk.testing.junit5.OpenTelemetryExtension;
 import io.opentelemetry.sdk.trace.data.SpanData;
 import java.util.ArrayList;
 import java.util.Collections;
@@ -22,9 +22,11 @@ import javax.annotation.Nullable;
 public final class TestUtils {
   private TestUtils() {}
 
-  /** Returns the number of finished {@code Span}s in the specified {@code InMemorySpanExporter}. */
-  public static Callable<Integer> finishedSpansSize(final InMemorySpanExporter tracer) {
-    return () -> tracer.getFinishedSpanItems().size();
+  /**
+   * Returns the number of finished {@code Span}s in the specified {@code OpenTelemetryExtension}.
+   */
+  public static Callable<Integer> finishedSpansSize(final OpenTelemetryExtension otelTesting) {
+    return () -> otelTesting.getSpans().size();
   }
 
   /** Returns a {@code List} with the {@code Span} matching the specified attribute. */
diff --git a/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/activespanreplacement/ActiveSpanReplacementTest.java b/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/activespanreplacement/ActiveSpanReplacementTest.java
index 14108ac7a2..46021bd5f4 100644
--- a/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/activespanreplacement/ActiveSpanReplacementTest.java
+++ b/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/activespanreplacement/ActiveSpanReplacementTest.java
@@ -5,7 +5,6 @@
 
 package io.opentelemetry.sdk.extensions.trace.testbed.activespanreplacement;
 
-import static io.opentelemetry.sdk.extensions.trace.testbed.TestUtils.finishedSpansSize;
 import static io.opentelemetry.sdk.extensions.trace.testbed.TestUtils.sleep;
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.awaitility.Awaitility.await;
@@ -15,22 +14,24 @@ import io.opentelemetry.api.trace.Span;
 import io.opentelemetry.api.trace.SpanId;
 import io.opentelemetry.api.trace.Tracer;
 import io.opentelemetry.context.Scope;
-import io.opentelemetry.exporters.inmemory.InMemoryTracing;
-import io.opentelemetry.sdk.trace.TracerSdkProvider;
+import io.opentelemetry.sdk.extensions.trace.testbed.TestUtils;
+import io.opentelemetry.sdk.testing.junit5.OpenTelemetryExtension;
 import io.opentelemetry.sdk.trace.data.SpanData;
 import java.util.List;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.TimeUnit;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.RegisterExtension;
 
 @SuppressWarnings("FutureReturnValueIgnored")
 class ActiveSpanReplacementTest {
 
-  private final TracerSdkProvider sdk = TracerSdkProvider.builder().build();
-  private final InMemoryTracing inMemoryTracing =
-      InMemoryTracing.builder().setTracerSdkManagement(sdk).build();
-  private final Tracer tracer = sdk.get(ActiveSpanReplacementTest.class.getName());
+  @RegisterExtension
+  static final OpenTelemetryExtension otelTesting = OpenTelemetryExtension.create();
+
+  private final Tracer tracer =
+      otelTesting.getOpenTelemetry().getTracer(ActiveSpanReplacementTest.class.getName());
   private final ExecutorService executor = Executors.newCachedThreadPool();
 
   @Test
@@ -44,9 +45,9 @@ class ActiveSpanReplacementTest {
 
     await()
         .atMost(15, TimeUnit.SECONDS)
-        .until(finishedSpansSize(inMemoryTracing.getSpanExporter()), equalTo(3));
+        .until(TestUtils.finishedSpansSize(otelTesting), equalTo(3));
 
-    List<SpanData> spans = inMemoryTracing.getSpanExporter().getFinishedSpanItems();
+    List<SpanData> spans = otelTesting.getSpans();
     assertThat(spans).hasSize(3);
     assertThat(spans.get(0).getName()).isEqualTo("initial"); // Isolated task
     assertThat(spans.get(1).getName()).isEqualTo("subtask");
diff --git a/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/actorpropagation/ActorPropagationTest.java b/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/actorpropagation/ActorPropagationTest.java
index 247e6225a4..8dd41db5db 100644
--- a/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/actorpropagation/ActorPropagationTest.java
+++ b/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/actorpropagation/ActorPropagationTest.java
@@ -11,9 +11,8 @@ import io.opentelemetry.api.trace.Span;
 import io.opentelemetry.api.trace.Span.Kind;
 import io.opentelemetry.api.trace.Tracer;
 import io.opentelemetry.context.Scope;
-import io.opentelemetry.exporters.inmemory.InMemoryTracing;
 import io.opentelemetry.sdk.extensions.trace.testbed.TestUtils;
-import io.opentelemetry.sdk.trace.TracerSdkProvider;
+import io.opentelemetry.sdk.testing.junit5.OpenTelemetryExtension;
 import io.opentelemetry.sdk.trace.data.SpanData;
 import java.util.List;
 import java.util.concurrent.ExecutionException;
@@ -21,6 +20,7 @@ import java.util.concurrent.Future;
 import java.util.concurrent.Phaser;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.RegisterExtension;
 
 /**
  * These tests are intended to simulate the kind of async models that are common in java async
@@ -31,10 +31,11 @@ import org.junit.jupiter.api.Test;
  */
 @SuppressWarnings("FutureReturnValueIgnored")
 class ActorPropagationTest {
-  private final TracerSdkProvider sdk = TracerSdkProvider.builder().build();
-  private final InMemoryTracing inMemoryTracing =
-      InMemoryTracing.builder().setTracerSdkManagement(sdk).build();
-  private final Tracer tracer = sdk.get(ActorPropagationTest.class.getName());
+  @RegisterExtension
+  static final OpenTelemetryExtension otelTesting = OpenTelemetryExtension.create();
+
+  private final Tracer tracer =
+      otelTesting.getOpenTelemetry().getTracer(ActorPropagationTest.class.getName());
   private Phaser phaser;
 
   @BeforeEach
@@ -56,17 +57,14 @@ class ActorPropagationTest {
       }
 
       phaser.arriveAndAwaitAdvance(); // child tracer started
-      assertThat(inMemoryTracing.getSpanExporter().getFinishedSpanItems()).hasSize(1);
+      assertThat(otelTesting.getSpans()).hasSize(1);
       phaser.arriveAndAwaitAdvance(); // continue...
       phaser.arriveAndAwaitAdvance(); // child tracer finished
-      assertThat(inMemoryTracing.getSpanExporter().getFinishedSpanItems()).hasSize(3);
-      assertThat(
-              TestUtils.getByKind(
-                  inMemoryTracing.getSpanExporter().getFinishedSpanItems(), Span.Kind.CONSUMER))
-          .hasSize(2);
+      assertThat(otelTesting.getSpans()).hasSize(3);
+      assertThat(TestUtils.getByKind(otelTesting.getSpans(), Span.Kind.CONSUMER)).hasSize(2);
       phaser.arriveAndDeregister(); // continue...
 
-      List<SpanData> finished = inMemoryTracing.getSpanExporter().getFinishedSpanItems();
+      List<SpanData> finished = otelTesting.getSpans();
       assertThat(finished.size()).isEqualTo(3);
       assertThat(finished.get(0).getTraceId()).isEqualTo(finished.get(1).getTraceId());
       assertThat(TestUtils.getByKind(finished, Span.Kind.CONSUMER)).hasSize(2);
@@ -92,17 +90,14 @@ class ActorPropagationTest {
         span.end();
       }
       phaser.arriveAndAwaitAdvance(); // child tracer started
-      assertThat(inMemoryTracing.getSpanExporter().getFinishedSpanItems().size()).isEqualTo(1);
+      assertThat(otelTesting.getSpans().size()).isEqualTo(1);
       phaser.arriveAndAwaitAdvance(); // continue...
       phaser.arriveAndAwaitAdvance(); // child tracer finished
-      assertThat(inMemoryTracing.getSpanExporter().getFinishedSpanItems().size()).isEqualTo(3);
-      assertThat(
-              TestUtils.getByKind(
-                  inMemoryTracing.getSpanExporter().getFinishedSpanItems(), Span.Kind.CONSUMER))
-          .hasSize(2);
+      assertThat(otelTesting.getSpans().size()).isEqualTo(3);
+      assertThat(TestUtils.getByKind(otelTesting.getSpans(), Span.Kind.CONSUMER)).hasSize(2);
       phaser.arriveAndDeregister(); // continue...
 
-      List<SpanData> finished = inMemoryTracing.getSpanExporter().getFinishedSpanItems();
+      List<SpanData> finished = otelTesting.getSpans();
       String message1 = future1.get(); // This really should be a non-blocking callback...
       String message2 = future2.get(); // This really should be a non-blocking callback...
       assertThat(message1).isEqualTo("received my message 1");
diff --git a/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/clientserver/TestClientServerTest.java b/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/clientserver/TestClientServerTest.java
index 98159e93a1..ea5197b6e2 100644
--- a/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/clientserver/TestClientServerTest.java
+++ b/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/clientserver/TestClientServerTest.java
@@ -13,9 +13,8 @@ import static org.junit.jupiter.api.Assertions.assertEquals;
 import io.opentelemetry.api.trace.Span;
 import io.opentelemetry.api.trace.Span.Kind;
 import io.opentelemetry.api.trace.Tracer;
-import io.opentelemetry.exporters.inmemory.InMemoryTracing;
 import io.opentelemetry.sdk.extensions.trace.testbed.TestUtils;
-import io.opentelemetry.sdk.trace.TracerSdkProvider;
+import io.opentelemetry.sdk.testing.junit5.OpenTelemetryExtension;
 import io.opentelemetry.sdk.trace.data.SpanData;
 import java.util.List;
 import java.util.concurrent.ArrayBlockingQueue;
@@ -23,13 +22,15 @@ import java.util.concurrent.TimeUnit;
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.RegisterExtension;
 
 class TestClientServerTest {
 
-  private final TracerSdkProvider sdk = TracerSdkProvider.builder().build();
-  private final InMemoryTracing inMemoryTracing =
-      InMemoryTracing.builder().setTracerSdkManagement(sdk).build();
-  private final Tracer tracer = sdk.get(TestClientServerTest.class.getName());
+  @RegisterExtension
+  static final OpenTelemetryExtension otelTesting = OpenTelemetryExtension.create();
+
+  private final Tracer tracer =
+      otelTesting.getOpenTelemetry().getTracer(TestClientServerTest.class.getName());
   private final ArrayBlockingQueue<Message> queue = new ArrayBlockingQueue<>(10);
   private Server server;
 
@@ -52,9 +53,9 @@ class TestClientServerTest {
 
     await()
         .atMost(15, TimeUnit.SECONDS)
-        .until(TestUtils.finishedSpansSize(inMemoryTracing.getSpanExporter()), equalTo(2));
+        .until(TestUtils.finishedSpansSize(otelTesting), equalTo(2));
 
-    List<SpanData> finished = inMemoryTracing.getSpanExporter().getFinishedSpanItems();
+    List<SpanData> finished = otelTesting.getSpans();
     assertEquals(2, finished.size());
 
     finished = TestUtils.sortByStartTime(finished);
diff --git a/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/concurrentcommonrequesthandler/HandlerTest.java b/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/concurrentcommonrequesthandler/HandlerTest.java
index 3533d41442..62356aa7ca 100644
--- a/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/concurrentcommonrequesthandler/HandlerTest.java
+++ b/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/concurrentcommonrequesthandler/HandlerTest.java
@@ -12,15 +12,14 @@ import io.opentelemetry.api.trace.SpanId;
 import io.opentelemetry.api.trace.Tracer;
 import io.opentelemetry.context.Context;
 import io.opentelemetry.context.Scope;
-import io.opentelemetry.exporters.inmemory.InMemoryTracing;
 import io.opentelemetry.sdk.extensions.trace.testbed.TestUtils;
-import io.opentelemetry.sdk.trace.TracerSdkProvider;
+import io.opentelemetry.sdk.testing.junit5.OpenTelemetryExtension;
 import io.opentelemetry.sdk.trace.data.SpanData;
 import java.util.List;
 import java.util.concurrent.Future;
 import java.util.concurrent.TimeUnit;
-import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.RegisterExtension;
 
 /**
  * There is only one instance of 'RequestHandler' per 'Client'. Methods of 'RequestHandler' are
@@ -29,16 +28,13 @@ import org.junit.jupiter.api.Test;
  */
 class HandlerTest {
 
-  private final TracerSdkProvider sdk = TracerSdkProvider.builder().build();
-  private final InMemoryTracing inMemoryTracing =
-      InMemoryTracing.builder().setTracerSdkManagement(sdk).build();
-  private final Tracer tracer = sdk.get(HandlerTest.class.getName());
-  private final Client client = new Client(new RequestHandler(tracer));
+  @RegisterExtension
+  static final OpenTelemetryExtension otelTesting = OpenTelemetryExtension.create();
 
-  @BeforeEach
-  void before() {
-    inMemoryTracing.getSpanExporter().reset();
-  }
+  private final Tracer tracer =
+      otelTesting.getOpenTelemetry().getTracer(HandlerTest.class.getName());
+
+  private final Client client = new Client(new RequestHandler(tracer));
 
   @Test
   void two_requests() throws Exception {
@@ -48,7 +44,7 @@ class HandlerTest {
     assertThat(responseFuture.get(15, TimeUnit.SECONDS)).isEqualTo("message:response");
     assertThat(responseFuture2.get(15, TimeUnit.SECONDS)).isEqualTo("message2:response");
 
-    List<SpanData> finished = inMemoryTracing.getSpanExporter().getFinishedSpanItems();
+    List<SpanData> finished = otelTesting.getSpans();
     assertThat(finished).hasSize(2);
 
     for (SpanData spanProto : finished) {
@@ -73,7 +69,7 @@ class HandlerTest {
       parentSpan.end();
     }
 
-    List<SpanData> finished = inMemoryTracing.getSpanExporter().getFinishedSpanItems();
+    List<SpanData> finished = otelTesting.getSpans();
     assertThat(finished).hasSize(2);
 
     SpanData child = TestUtils.getOneByName(finished, RequestHandler.OPERATION_NAME);
@@ -108,7 +104,7 @@ class HandlerTest {
     String response = client.send("wrong_parent").get(15, TimeUnit.SECONDS);
     assertThat(response).isEqualTo("wrong_parent:response");
 
-    List<SpanData> finished = inMemoryTracing.getSpanExporter().getFinishedSpanItems();
+    List<SpanData> finished = otelTesting.getSpans();
     assertThat(finished).hasSize(3);
 
     finished = TestUtils.sortByStartTime(finished);
diff --git a/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/errorreporting/ErrorReportingTest.java b/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/errorreporting/ErrorReportingTest.java
index 1aab8cb41d..2d7fa48781 100644
--- a/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/errorreporting/ErrorReportingTest.java
+++ b/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/errorreporting/ErrorReportingTest.java
@@ -14,9 +14,8 @@ import io.opentelemetry.api.trace.Span;
 import io.opentelemetry.api.trace.StatusCode;
 import io.opentelemetry.api.trace.Tracer;
 import io.opentelemetry.context.Scope;
-import io.opentelemetry.exporters.inmemory.InMemoryTracing;
 import io.opentelemetry.sdk.extensions.trace.testbed.TestUtils;
-import io.opentelemetry.sdk.trace.TracerSdkProvider;
+import io.opentelemetry.sdk.testing.junit5.OpenTelemetryExtension;
 import io.opentelemetry.sdk.trace.data.SpanData;
 import io.opentelemetry.sdk.trace.data.SpanData.Event;
 import java.util.List;
@@ -24,14 +23,16 @@ import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.TimeUnit;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.RegisterExtension;
 
 @SuppressWarnings("FutureReturnValueIgnored")
 public final class ErrorReportingTest {
 
-  private final TracerSdkProvider sdk = TracerSdkProvider.builder().build();
-  private final InMemoryTracing inMemoryTracing =
-      InMemoryTracing.builder().setTracerSdkManagement(sdk).build();
-  private final Tracer tracer = sdk.get(ErrorReportingTest.class.getName());
+  @RegisterExtension
+  static final OpenTelemetryExtension otelTesting = OpenTelemetryExtension.create();
+
+  private final Tracer tracer =
+      otelTesting.getOpenTelemetry().getTracer(ErrorReportingTest.class.getName());
   private final ExecutorService executor = Executors.newCachedThreadPool();
 
   /* Very simple error handling **/
@@ -48,7 +49,7 @@ public final class ErrorReportingTest {
 
     assertThat(Span.current()).isSameAs(Span.getInvalid());
 
-    List<SpanData> spans = inMemoryTracing.getSpanExporter().getFinishedSpanItems();
+    List<SpanData> spans = otelTesting.getSpans();
     assertThat(spans).hasSize(1);
     assertThat(spans.get(0).getStatus().getCanonicalCode()).isEqualTo(StatusCode.ERROR);
   }
@@ -68,11 +69,9 @@ public final class ErrorReportingTest {
           }
         });
 
-    await()
-        .atMost(5, TimeUnit.SECONDS)
-        .until(TestUtils.finishedSpansSize(inMemoryTracing.getSpanExporter()), equalTo(1));
+    await().atMost(5, TimeUnit.SECONDS).until(TestUtils.finishedSpansSize(otelTesting), equalTo(1));
 
-    List<SpanData> spans = inMemoryTracing.getSpanExporter().getFinishedSpanItems();
+    List<SpanData> spans = otelTesting.getSpans();
     assertThat(spans).hasSize(1);
     assertThat(spans.get(0).getStatus().getCanonicalCode()).isEqualTo(StatusCode.ERROR);
   }
@@ -99,7 +98,7 @@ public final class ErrorReportingTest {
 
     assertThat(Span.current()).isSameAs(Span.getInvalid());
 
-    List<SpanData> spans = inMemoryTracing.getSpanExporter().getFinishedSpanItems();
+    List<SpanData> spans = otelTesting.getSpans();
     assertThat(spans).hasSize(1);
     assertThat(spans.get(0).getStatus().getCanonicalCode()).isEqualTo(StatusCode.ERROR);
 
@@ -129,11 +128,9 @@ public final class ErrorReportingTest {
               tracer));
     }
 
-    await()
-        .atMost(5, TimeUnit.SECONDS)
-        .until(TestUtils.finishedSpansSize(inMemoryTracing.getSpanExporter()), equalTo(1));
+    await().atMost(5, TimeUnit.SECONDS).until(TestUtils.finishedSpansSize(otelTesting), equalTo(1));
 
-    List<SpanData> spans = inMemoryTracing.getSpanExporter().getFinishedSpanItems();
+    List<SpanData> spans = otelTesting.getSpans();
     assertEquals(spans.size(), 1);
     assertEquals(spans.get(0).getStatus().getCanonicalCode(), StatusCode.ERROR);
   }
diff --git a/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/latespanfinish/LateSpanFinishTest.java b/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/latespanfinish/LateSpanFinishTest.java
index f334482b0a..8431a9cc89 100644
--- a/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/latespanfinish/LateSpanFinishTest.java
+++ b/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/latespanfinish/LateSpanFinishTest.java
@@ -10,22 +10,23 @@ import static org.assertj.core.api.Assertions.assertThat;
 import io.opentelemetry.api.trace.Span;
 import io.opentelemetry.api.trace.Tracer;
 import io.opentelemetry.context.Scope;
-import io.opentelemetry.exporters.inmemory.InMemoryTracing;
 import io.opentelemetry.sdk.extensions.trace.testbed.TestUtils;
-import io.opentelemetry.sdk.trace.TracerSdkProvider;
+import io.opentelemetry.sdk.testing.junit5.OpenTelemetryExtension;
 import io.opentelemetry.sdk.trace.data.SpanData;
 import java.util.List;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.TimeUnit;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.RegisterExtension;
 
 @SuppressWarnings("FutureReturnValueIgnored")
 public final class LateSpanFinishTest {
-  private final TracerSdkProvider sdk = TracerSdkProvider.builder().build();
-  private final InMemoryTracing inMemoryTracing =
-      InMemoryTracing.builder().setTracerSdkManagement(sdk).build();
-  private final Tracer tracer = sdk.get(LateSpanFinishTest.class.getName());
+  @RegisterExtension
+  static final OpenTelemetryExtension otelTesting = OpenTelemetryExtension.create();
+
+  private final Tracer tracer =
+      otelTesting.getOpenTelemetry().getTracer(LateSpanFinishTest.class.getName());
   private final ExecutorService executor = Executors.newCachedThreadPool();
 
   @Test
@@ -42,7 +43,7 @@ public final class LateSpanFinishTest {
     parentSpan.end();
 
     // Children finish order is not guaranteed, but parent should finish *last*.
-    List<SpanData> spans = inMemoryTracing.getSpanExporter().getFinishedSpanItems();
+    List<SpanData> spans = otelTesting.getSpans();
     assertThat(spans).hasSize(3);
     assertThat(spans.get(0).getName()).startsWith("task");
     assertThat(spans.get(1).getName()).startsWith("task");
diff --git a/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/listenerperrequest/ListenerTest.java b/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/listenerperrequest/ListenerTest.java
index ddc84cb6de..9f34766dc0 100644
--- a/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/listenerperrequest/ListenerTest.java
+++ b/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/listenerperrequest/ListenerTest.java
@@ -10,18 +10,19 @@ import static org.assertj.core.api.Assertions.assertThat;
 import io.opentelemetry.api.trace.Span;
 import io.opentelemetry.api.trace.Span.Kind;
 import io.opentelemetry.api.trace.Tracer;
-import io.opentelemetry.exporters.inmemory.InMemoryTracing;
-import io.opentelemetry.sdk.trace.TracerSdkProvider;
+import io.opentelemetry.sdk.testing.junit5.OpenTelemetryExtension;
 import io.opentelemetry.sdk.trace.data.SpanData;
 import java.util.List;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.RegisterExtension;
 
 /** Each request has own instance of ResponseListener. */
 class ListenerTest {
-  private final TracerSdkProvider sdk = TracerSdkProvider.builder().build();
-  private final InMemoryTracing inMemoryTracing =
-      InMemoryTracing.builder().setTracerSdkManagement(sdk).build();
-  private final Tracer tracer = sdk.get(ListenerTest.class.getName());
+  @RegisterExtension
+  static final OpenTelemetryExtension otelTesting = OpenTelemetryExtension.create();
+
+  private final Tracer tracer =
+      otelTesting.getOpenTelemetry().getTracer(ListenerTest.class.getName());
 
   @Test
   void test() throws Exception {
@@ -29,7 +30,7 @@ class ListenerTest {
     Object response = client.send("message").get();
     assertThat(response).isEqualTo("message:response");
 
-    List<SpanData> finished = inMemoryTracing.getSpanExporter().getFinishedSpanItems();
+    List<SpanData> finished = otelTesting.getSpans();
     assertThat(finished).hasSize(1);
     assertThat(finished.get(0).getKind()).isEqualTo(Kind.CLIENT);
 
diff --git a/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/multiplecallbacks/MultipleCallbacksTest.java b/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/multiplecallbacks/MultipleCallbacksTest.java
index b0a9615fa3..feffa57709 100644
--- a/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/multiplecallbacks/MultipleCallbacksTest.java
+++ b/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/multiplecallbacks/MultipleCallbacksTest.java
@@ -12,14 +12,14 @@ import static org.hamcrest.core.IsEqual.equalTo;
 import io.opentelemetry.api.trace.Span;
 import io.opentelemetry.api.trace.Tracer;
 import io.opentelemetry.context.Scope;
-import io.opentelemetry.exporters.inmemory.InMemoryTracing;
 import io.opentelemetry.sdk.extensions.trace.testbed.TestUtils;
-import io.opentelemetry.sdk.trace.TracerSdkProvider;
+import io.opentelemetry.sdk.testing.junit5.OpenTelemetryExtension;
 import io.opentelemetry.sdk.trace.data.SpanData;
 import java.util.List;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.TimeUnit;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.RegisterExtension;
 
 /**
  * These tests are intended to simulate a task with independent, asynchronous callbacks.
@@ -29,10 +29,11 @@ import org.junit.jupiter.api.Test;
  */
 @SuppressWarnings("FutureReturnValueIgnored")
 class MultipleCallbacksTest {
-  private final TracerSdkProvider sdk = TracerSdkProvider.builder().build();
-  private final InMemoryTracing inMemoryTracing =
-      InMemoryTracing.builder().setTracerSdkManagement(sdk).build();
-  private final Tracer tracer = sdk.get(MultipleCallbacksTest.class.getName());
+  @RegisterExtension
+  static final OpenTelemetryExtension otelTesting = OpenTelemetryExtension.create();
+
+  private final Tracer tracer =
+      otelTesting.getOpenTelemetry().getTracer(MultipleCallbacksTest.class.getName());
 
   @Test
   void test() {
@@ -51,9 +52,9 @@ class MultipleCallbacksTest {
 
     await()
         .atMost(15, TimeUnit.SECONDS)
-        .until(TestUtils.finishedSpansSize(inMemoryTracing.getSpanExporter()), equalTo(4));
+        .until(TestUtils.finishedSpansSize(otelTesting), equalTo(4));
 
-    List<SpanData> spans = inMemoryTracing.getSpanExporter().getFinishedSpanItems();
+    List<SpanData> spans = otelTesting.getSpans();
     assertThat(spans).hasSize(4);
     assertThat(spans.get(0).getName()).isEqualTo("parent");
 
diff --git a/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/nestedcallbacks/NestedCallbacksTest.java b/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/nestedcallbacks/NestedCallbacksTest.java
index ded27310fc..5186a53529 100644
--- a/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/nestedcallbacks/NestedCallbacksTest.java
+++ b/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/nestedcallbacks/NestedCallbacksTest.java
@@ -14,23 +14,23 @@ import io.opentelemetry.api.common.ReadableAttributes;
 import io.opentelemetry.api.trace.Span;
 import io.opentelemetry.api.trace.Tracer;
 import io.opentelemetry.context.Scope;
-import io.opentelemetry.exporters.inmemory.InMemoryTracing;
 import io.opentelemetry.sdk.extensions.trace.testbed.TestUtils;
-import io.opentelemetry.sdk.trace.TracerSdkProvider;
+import io.opentelemetry.sdk.testing.junit5.OpenTelemetryExtension;
 import io.opentelemetry.sdk.trace.data.SpanData;
 import java.util.List;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.TimeUnit;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.RegisterExtension;
 
 @SuppressWarnings("FutureReturnValueIgnored")
 public final class NestedCallbacksTest {
+  @RegisterExtension
+  static final OpenTelemetryExtension otelTesting = OpenTelemetryExtension.create();
 
-  private final TracerSdkProvider sdk = TracerSdkProvider.builder().build();
-  private final InMemoryTracing inMemoryTracing =
-      InMemoryTracing.builder().setTracerSdkManagement(sdk).build();
-  private final Tracer tracer = sdk.get(NestedCallbacksTest.class.getName());
+  private final Tracer tracer =
+      otelTesting.getOpenTelemetry().getTracer(NestedCallbacksTest.class.getName());
   private final ExecutorService executor = Executors.newCachedThreadPool();
 
   @Test
@@ -41,9 +41,9 @@ public final class NestedCallbacksTest {
 
     await()
         .atMost(15, TimeUnit.SECONDS)
-        .until(TestUtils.finishedSpansSize(inMemoryTracing.getSpanExporter()), equalTo(1));
+        .until(TestUtils.finishedSpansSize(otelTesting), equalTo(1));
 
-    List<SpanData> spans = inMemoryTracing.getSpanExporter().getFinishedSpanItems();
+    List<SpanData> spans = otelTesting.getSpans();
     assertThat(spans).hasSize(1);
     assertThat(spans.get(0).getName()).isEqualTo("one");
 
diff --git a/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/promisepropagation/PromisePropagationTest.java b/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/promisepropagation/PromisePropagationTest.java
index 17db4ef54e..edc242b11e 100644
--- a/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/promisepropagation/PromisePropagationTest.java
+++ b/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/promisepropagation/PromisePropagationTest.java
@@ -13,15 +13,16 @@ import io.opentelemetry.api.trace.Span;
 import io.opentelemetry.api.trace.SpanId;
 import io.opentelemetry.api.trace.Tracer;
 import io.opentelemetry.context.Scope;
-import io.opentelemetry.exporters.inmemory.InMemoryTracing;
 import io.opentelemetry.sdk.extensions.trace.testbed.TestUtils;
-import io.opentelemetry.sdk.trace.TracerSdkProvider;
+import io.opentelemetry.sdk.extensions.trace.testbed.nestedcallbacks.NestedCallbacksTest;
+import io.opentelemetry.sdk.testing.junit5.OpenTelemetryExtension;
 import io.opentelemetry.sdk.trace.data.SpanData;
 import java.util.List;
 import java.util.concurrent.Phaser;
 import java.util.concurrent.atomic.AtomicReference;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.RegisterExtension;
 
 /**
  * These tests are intended to simulate the kind of async models that are common in java async
@@ -31,10 +32,11 @@ import org.junit.jupiter.api.Test;
  * execution for the tests without sleeps.
  */
 class PromisePropagationTest {
-  private final TracerSdkProvider sdk = TracerSdkProvider.builder().build();
-  private final InMemoryTracing inMemoryTracing =
-      InMemoryTracing.builder().setTracerSdkManagement(sdk).build();
-  private final Tracer tracer = sdk.get(PromisePropagationTest.class.getName());
+  @RegisterExtension
+  static final OpenTelemetryExtension otelTesting = OpenTelemetryExtension.create();
+
+  private final Tracer tracer =
+      otelTesting.getOpenTelemetry().getTracer(NestedCallbacksTest.class.getName());
   private Phaser phaser;
 
   @BeforeEach
@@ -77,7 +79,7 @@ class PromisePropagationTest {
               phaser.arriveAndAwaitAdvance(); // result set
             });
 
-        assertThat(inMemoryTracing.getSpanExporter().getFinishedSpanItems().size()).isEqualTo(0);
+        assertThat(otelTesting.getSpans().size()).isEqualTo(0);
         successPromise.success("success!");
         errorPromise.error(new Exception("some error."));
       } finally {
@@ -91,7 +93,7 @@ class PromisePropagationTest {
 
       phaser.arriveAndAwaitAdvance(); // wait for traces to be reported
 
-      List<SpanData> finished = inMemoryTracing.getSpanExporter().getFinishedSpanItems();
+      List<SpanData> finished = otelTesting.getSpans();
       assertThat(finished.size()).isEqualTo(4);
 
       AttributeKey<String> component = stringKey("component");
diff --git a/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/statelesscommonrequesthandler/HandlerTest.java b/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/statelesscommonrequesthandler/HandlerTest.java
index ce3e368e88..5e5cc3e6b6 100644
--- a/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/statelesscommonrequesthandler/HandlerTest.java
+++ b/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/statelesscommonrequesthandler/HandlerTest.java
@@ -8,14 +8,13 @@ package io.opentelemetry.sdk.extensions.trace.testbed.statelesscommonrequesthand
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
 import io.opentelemetry.api.trace.Tracer;
-import io.opentelemetry.exporters.inmemory.InMemoryTracing;
-import io.opentelemetry.sdk.trace.TracerSdkProvider;
+import io.opentelemetry.sdk.testing.junit5.OpenTelemetryExtension;
 import io.opentelemetry.sdk.trace.data.SpanData;
 import java.util.List;
 import java.util.concurrent.Future;
 import java.util.concurrent.TimeUnit;
-import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.RegisterExtension;
 
 /**
  * There is only one instance of 'RequestHandler' per 'Client'. Methods of 'RequestHandler' are
@@ -23,16 +22,12 @@ import org.junit.jupiter.api.Test;
  */
 public final class HandlerTest {
 
-  private final TracerSdkProvider sdk = TracerSdkProvider.builder().build();
-  private final InMemoryTracing inMemoryTracing =
-      InMemoryTracing.builder().setTracerSdkManagement(sdk).build();
-  private final Tracer tracer = sdk.get(HandlerTest.class.getName());
-  private final Client client = new Client(new RequestHandler(tracer));
+  @RegisterExtension
+  static final OpenTelemetryExtension otelTesting = OpenTelemetryExtension.create();
 
-  @BeforeEach
-  void before() {
-    inMemoryTracing.getSpanExporter().reset();
-  }
+  private final Tracer tracer =
+      otelTesting.getOpenTelemetry().getTracer(HandlerTest.class.getName());
+  private final Client client = new Client(new RequestHandler(tracer));
 
   @Test
   void test_requests() throws Exception {
@@ -44,7 +39,7 @@ public final class HandlerTest {
     assertEquals("message2:response", responseFuture2.get(5, TimeUnit.SECONDS));
     assertEquals("message:response", responseFuture.get(5, TimeUnit.SECONDS));
 
-    List<SpanData> finished = inMemoryTracing.getSpanExporter().getFinishedSpanItems();
+    List<SpanData> finished = otelTesting.getSpans();
     assertEquals(3, finished.size());
   }
 }
diff --git a/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/suspendresumepropagation/SuspendResumePropagationTest.java b/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/suspendresumepropagation/SuspendResumePropagationTest.java
index 25741d158a..5a6a4c9c63 100644
--- a/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/suspendresumepropagation/SuspendResumePropagationTest.java
+++ b/sdk-extensions/testbed/src/test/java/io/opentelemetry/sdk/extensions/trace/testbed/suspendresumepropagation/SuspendResumePropagationTest.java
@@ -9,22 +9,24 @@ import static org.assertj.core.api.Assertions.assertThat;
 
 import io.opentelemetry.api.trace.SpanId;
 import io.opentelemetry.api.trace.Tracer;
-import io.opentelemetry.exporters.inmemory.InMemoryTracing;
-import io.opentelemetry.sdk.trace.TracerSdkProvider;
+import io.opentelemetry.sdk.extensions.trace.testbed.statelesscommonrequesthandler.HandlerTest;
+import io.opentelemetry.sdk.testing.junit5.OpenTelemetryExtension;
 import io.opentelemetry.sdk.trace.data.SpanData;
 import java.util.List;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.RegisterExtension;
 
 /**
  * These tests are intended to simulate the kind of async models that are common in java async
  * frameworks.
  */
 class SuspendResumePropagationTest {
-  private final TracerSdkProvider sdk = TracerSdkProvider.builder().build();
-  private final InMemoryTracing inMemoryTracing =
-      InMemoryTracing.builder().setTracerSdkManagement(sdk).build();
-  private final Tracer tracer = sdk.get(SuspendResumePropagationTest.class.getName());
+  @RegisterExtension
+  static final OpenTelemetryExtension otelTesting = OpenTelemetryExtension.create();
+
+  private final Tracer tracer =
+      otelTesting.getOpenTelemetry().getTracer(HandlerTest.class.getName());
 
   @BeforeEach
   void before() {}
@@ -45,7 +47,7 @@ class SuspendResumePropagationTest {
     job1.done();
     job2.done();
 
-    List<SpanData> finished = inMemoryTracing.getSpanExporter().getFinishedSpanItems();
+    List<SpanData> finished = otelTesting.getSpans();
     assertThat(finished.size()).isEqualTo(2);
 
     assertThat(finished.get(0).getName()).isEqualTo("job 1");