diff --git a/instrumentation/okhttp/okhttp-3.0/javaagent/build.gradle.kts b/instrumentation/okhttp/okhttp-3.0/javaagent/build.gradle.kts
index db0f92fafc..8b903da615 100644
--- a/instrumentation/okhttp/okhttp-3.0/javaagent/build.gradle.kts
+++ b/instrumentation/okhttp/okhttp-3.0/javaagent/build.gradle.kts
@@ -20,3 +20,27 @@ dependencies {
 
   testImplementation(project(":instrumentation:okhttp:okhttp-3.0:testing"))
 }
+
+val testLatestDeps = findProperty("testLatestDeps") as Boolean
+
+testing {
+  suites {
+    val http2Test by registering(JvmTestSuite::class) {
+      dependencies {
+        if (testLatestDeps) {
+          implementation("com.squareup.okhttp3:okhttp:+")
+          compileOnly("com.google.android:annotations:4.1.1.4")
+        } else {
+          implementation("com.squareup.okhttp3:okhttp:3.11.0")
+        }
+        implementation(project(":instrumentation:okhttp:okhttp-3.0:testing"))
+      }
+    }
+  }
+}
+
+tasks {
+  check {
+    dependsOn(testing.suites)
+  }
+}
diff --git a/instrumentation/okhttp/okhttp-3.0/javaagent/src/http2Test/java/io/opentelemetry/javaagent/instrumentation/okhttp/v3_0/OkHttp3Http2Test.java b/instrumentation/okhttp/okhttp-3.0/javaagent/src/http2Test/java/io/opentelemetry/javaagent/instrumentation/okhttp/v3_0/OkHttp3Http2Test.java
new file mode 100644
index 0000000000..7d4f29b543
--- /dev/null
+++ b/instrumentation/okhttp/okhttp-3.0/javaagent/src/http2Test/java/io/opentelemetry/javaagent/instrumentation/okhttp/v3_0/OkHttp3Http2Test.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright The OpenTelemetry Authors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package io.opentelemetry.javaagent.instrumentation.okhttp.v3_0;
+
+import static java.util.Collections.singletonList;
+
+import io.opentelemetry.instrumentation.okhttp.v3_0.AbstractOkHttp3Test;
+import io.opentelemetry.instrumentation.testing.junit.InstrumentationExtension;
+import io.opentelemetry.instrumentation.testing.junit.http.HttpClientInstrumentationExtension;
+import io.opentelemetry.instrumentation.testing.junit.http.HttpClientTestOptions;
+import okhttp3.Call;
+import okhttp3.OkHttpClient;
+import okhttp3.Protocol;
+import org.junit.jupiter.api.extension.RegisterExtension;
+
+class OkHttp3Http2Test extends AbstractOkHttp3Test {
+
+  @RegisterExtension
+  static final InstrumentationExtension testing = HttpClientInstrumentationExtension.forAgent();
+
+  @Override
+  public Call.Factory createCallFactory(OkHttpClient.Builder clientBuilder) {
+    clientBuilder.protocols(singletonList(Protocol.H2_PRIOR_KNOWLEDGE));
+    return clientBuilder.build();
+  }
+
+  @Override
+  protected void configure(HttpClientTestOptions.Builder optionsBuilder) {
+    super.configure(optionsBuilder);
+
+    // https does not work with H2_PRIOR_KNOWLEDGE
+    optionsBuilder.disableTestHttps();
+    optionsBuilder.setHttpProtocolVersion(uri -> "2");
+  }
+}
diff --git a/instrumentation/okhttp/okhttp-3.0/javaagent/src/test/java/io/opentelemetry/javaagent/instrumentation/okhttp/v3_0/OkHttp3Test.java b/instrumentation/okhttp/okhttp-3.0/javaagent/src/test/java/io/opentelemetry/javaagent/instrumentation/okhttp/v3_0/OkHttp3Test.java
index 37653b1c07..f7c4d0face 100644
--- a/instrumentation/okhttp/okhttp-3.0/javaagent/src/test/java/io/opentelemetry/javaagent/instrumentation/okhttp/v3_0/OkHttp3Test.java
+++ b/instrumentation/okhttp/okhttp-3.0/javaagent/src/test/java/io/opentelemetry/javaagent/instrumentation/okhttp/v3_0/OkHttp3Test.java
@@ -5,6 +5,7 @@
 
 package io.opentelemetry.javaagent.instrumentation.okhttp.v3_0;
 
+import static java.util.Collections.singletonList;
 import static org.assertj.core.api.Assertions.assertThat;
 
 import io.opentelemetry.instrumentation.okhttp.v3_0.AbstractOkHttp3Test;
@@ -13,16 +14,18 @@ import io.opentelemetry.instrumentation.testing.junit.http.HttpClientInstrumenta
 import java.util.concurrent.TimeUnit;
 import okhttp3.Call;
 import okhttp3.OkHttpClient;
+import okhttp3.Protocol;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.RegisterExtension;
 
-public class OkHttp3Test extends AbstractOkHttp3Test {
+class OkHttp3Test extends AbstractOkHttp3Test {
 
   @RegisterExtension
   static final InstrumentationExtension testing = HttpClientInstrumentationExtension.forAgent();
 
   @Override
   public Call.Factory createCallFactory(OkHttpClient.Builder clientBuilder) {
+    clientBuilder.protocols(singletonList(Protocol.HTTP_1_1));
     return clientBuilder.build();
   }
 
diff --git a/instrumentation/okhttp/okhttp-3.0/library/build.gradle.kts b/instrumentation/okhttp/okhttp-3.0/library/build.gradle.kts
index 4d262a4cf4..c241f44fb8 100644
--- a/instrumentation/okhttp/okhttp-3.0/library/build.gradle.kts
+++ b/instrumentation/okhttp/okhttp-3.0/library/build.gradle.kts
@@ -9,3 +9,28 @@ dependencies {
 
   testImplementation(project(":instrumentation:okhttp:okhttp-3.0:testing"))
 }
+
+val testLatestDeps = findProperty("testLatestDeps") as Boolean
+
+testing {
+  suites {
+    val http2Test by registering(JvmTestSuite::class) {
+      dependencies {
+        implementation(project())
+        if (testLatestDeps) {
+          implementation("com.squareup.okhttp3:okhttp:+")
+          compileOnly("com.google.android:annotations:4.1.1.4")
+        } else {
+          implementation("com.squareup.okhttp3:okhttp:3.11.0")
+        }
+        implementation(project(":instrumentation:okhttp:okhttp-3.0:testing"))
+      }
+    }
+  }
+}
+
+tasks {
+  check {
+    dependsOn(testing.suites)
+  }
+}
diff --git a/instrumentation/okhttp/okhttp-3.0/library/src/http2Test/java/io/opentelemetry/instrumentation/okhttp/v3_0/OkHttp3Http2Test.java b/instrumentation/okhttp/okhttp-3.0/library/src/http2Test/java/io/opentelemetry/instrumentation/okhttp/v3_0/OkHttp3Http2Test.java
new file mode 100644
index 0000000000..1ce2679d81
--- /dev/null
+++ b/instrumentation/okhttp/okhttp-3.0/library/src/http2Test/java/io/opentelemetry/instrumentation/okhttp/v3_0/OkHttp3Http2Test.java
@@ -0,0 +1,42 @@
+/*
+ * Copyright The OpenTelemetry Authors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package io.opentelemetry.instrumentation.okhttp.v3_0;
+
+import static java.util.Collections.singletonList;
+
+import io.opentelemetry.instrumentation.testing.junit.InstrumentationExtension;
+import io.opentelemetry.instrumentation.testing.junit.http.AbstractHttpClientTest;
+import io.opentelemetry.instrumentation.testing.junit.http.HttpClientInstrumentationExtension;
+import io.opentelemetry.instrumentation.testing.junit.http.HttpClientTestOptions;
+import okhttp3.Call;
+import okhttp3.OkHttpClient;
+import okhttp3.Protocol;
+import org.junit.jupiter.api.extension.RegisterExtension;
+
+class OkHttp3Http2Test extends AbstractOkHttp3Test {
+
+  @RegisterExtension
+  static final InstrumentationExtension testing = HttpClientInstrumentationExtension.forLibrary();
+
+  @Override
+  public Call.Factory createCallFactory(OkHttpClient.Builder clientBuilder) {
+    clientBuilder.protocols(singletonList(Protocol.H2_PRIOR_KNOWLEDGE));
+    return OkHttpTelemetry.builder(testing.getOpenTelemetry())
+        .setCapturedRequestHeaders(singletonList(AbstractHttpClientTest.TEST_REQUEST_HEADER))
+        .setCapturedResponseHeaders(singletonList(AbstractHttpClientTest.TEST_RESPONSE_HEADER))
+        .build()
+        .newCallFactory(clientBuilder.build());
+  }
+
+  @Override
+  protected void configure(HttpClientTestOptions.Builder optionsBuilder) {
+    super.configure(optionsBuilder);
+
+    // https does not work with H2_PRIOR_KNOWLEDGE
+    optionsBuilder.disableTestHttps();
+    optionsBuilder.setHttpProtocolVersion(uri -> "2");
+  }
+}
diff --git a/instrumentation/okhttp/okhttp-3.0/library/src/main/java/io/opentelemetry/instrumentation/okhttp/v3_0/internal/OkHttpAttributesGetter.java b/instrumentation/okhttp/okhttp-3.0/library/src/main/java/io/opentelemetry/instrumentation/okhttp/v3_0/internal/OkHttpAttributesGetter.java
index 6db3e41251..b6b9aab4a5 100644
--- a/instrumentation/okhttp/okhttp-3.0/library/src/main/java/io/opentelemetry/instrumentation/okhttp/v3_0/internal/OkHttpAttributesGetter.java
+++ b/instrumentation/okhttp/okhttp-3.0/library/src/main/java/io/opentelemetry/instrumentation/okhttp/v3_0/internal/OkHttpAttributesGetter.java
@@ -58,6 +58,10 @@ public enum OkHttpAttributesGetter implements HttpClientAttributesGetter<Request
       case SPDY_3:
         return "spdy";
     }
+    // added in 3.11.0
+    if ("H2_PRIOR_KNOWLEDGE".equals(response.protocol().name())) {
+      return "http";
+    }
     return null;
   }
 
@@ -77,6 +81,10 @@ public enum OkHttpAttributesGetter implements HttpClientAttributesGetter<Request
       case SPDY_3:
         return "3.1";
     }
+    // added in 3.11.0
+    if ("H2_PRIOR_KNOWLEDGE".equals(response.protocol().name())) {
+      return "2";
+    }
     return null;
   }
 
diff --git a/instrumentation/okhttp/okhttp-3.0/library/src/test/java/io/opentelemetry/instrumentation/okhttp/v3_0/OkHttp3Test.java b/instrumentation/okhttp/okhttp-3.0/library/src/test/java/io/opentelemetry/instrumentation/okhttp/v3_0/OkHttp3Test.java
index f7acc71252..b2f8bbddc6 100644
--- a/instrumentation/okhttp/okhttp-3.0/library/src/test/java/io/opentelemetry/instrumentation/okhttp/v3_0/OkHttp3Test.java
+++ b/instrumentation/okhttp/okhttp-3.0/library/src/test/java/io/opentelemetry/instrumentation/okhttp/v3_0/OkHttp3Test.java
@@ -5,26 +5,27 @@
 
 package io.opentelemetry.instrumentation.okhttp.v3_0;
 
+import static java.util.Collections.singletonList;
+
 import io.opentelemetry.instrumentation.testing.junit.InstrumentationExtension;
 import io.opentelemetry.instrumentation.testing.junit.http.AbstractHttpClientTest;
 import io.opentelemetry.instrumentation.testing.junit.http.HttpClientInstrumentationExtension;
-import java.util.Collections;
 import okhttp3.Call;
 import okhttp3.OkHttpClient;
+import okhttp3.Protocol;
 import org.junit.jupiter.api.extension.RegisterExtension;
 
-public class OkHttp3Test extends AbstractOkHttp3Test {
+class OkHttp3Test extends AbstractOkHttp3Test {
 
   @RegisterExtension
   static final InstrumentationExtension testing = HttpClientInstrumentationExtension.forLibrary();
 
   @Override
   public Call.Factory createCallFactory(OkHttpClient.Builder clientBuilder) {
+    clientBuilder.protocols(singletonList(Protocol.HTTP_1_1));
     return OkHttpTelemetry.builder(testing.getOpenTelemetry())
-        .setCapturedRequestHeaders(
-            Collections.singletonList(AbstractHttpClientTest.TEST_REQUEST_HEADER))
-        .setCapturedResponseHeaders(
-            Collections.singletonList(AbstractHttpClientTest.TEST_RESPONSE_HEADER))
+        .setCapturedRequestHeaders(singletonList(AbstractHttpClientTest.TEST_REQUEST_HEADER))
+        .setCapturedResponseHeaders(singletonList(AbstractHttpClientTest.TEST_RESPONSE_HEADER))
         .build()
         .newCallFactory(clientBuilder.build());
   }
diff --git a/instrumentation/okhttp/okhttp-3.0/testing/src/main/java/io/opentelemetry/instrumentation/okhttp/v3_0/AbstractOkHttp3Test.java b/instrumentation/okhttp/okhttp-3.0/testing/src/main/java/io/opentelemetry/instrumentation/okhttp/v3_0/AbstractOkHttp3Test.java
index edeb29439b..5f051141f7 100644
--- a/instrumentation/okhttp/okhttp-3.0/testing/src/main/java/io/opentelemetry/instrumentation/okhttp/v3_0/AbstractOkHttp3Test.java
+++ b/instrumentation/okhttp/okhttp-3.0/testing/src/main/java/io/opentelemetry/instrumentation/okhttp/v3_0/AbstractOkHttp3Test.java
@@ -5,7 +5,6 @@
 
 package io.opentelemetry.instrumentation.okhttp.v3_0;
 
-import static java.util.Collections.singletonList;
 import static org.assertj.core.api.Assertions.assertThat;
 
 import io.opentelemetry.api.common.AttributeKey;
@@ -27,7 +26,6 @@ import okhttp3.Headers;
 import okhttp3.Interceptor;
 import okhttp3.MediaType;
 import okhttp3.OkHttpClient;
-import okhttp3.Protocol;
 import okhttp3.Request;
 import okhttp3.RequestBody;
 import okhttp3.Response;
@@ -45,8 +43,7 @@ public abstract class AbstractOkHttp3Test extends AbstractHttpClientTest<Request
   protected OkHttpClient.Builder getClientBuilder(boolean withReadTimeout) {
     OkHttpClient.Builder builder =
         new OkHttpClient.Builder()
-            .connectTimeout(CONNECTION_TIMEOUT.toMillis(), TimeUnit.MILLISECONDS)
-            .protocols(singletonList(Protocol.HTTP_1_1));
+            .connectTimeout(CONNECTION_TIMEOUT.toMillis(), TimeUnit.MILLISECONDS);
     if (withReadTimeout) {
       builder
           // don't want retries on time outs
@@ -125,6 +122,7 @@ public abstract class AbstractOkHttp3Test extends AbstractHttpClientTest<Request
           // response)
           if ("http://localhost:61/".equals(uri.toString())
               || "https://192.0.2.1/".equals(uri.toString())
+              || "http://192.0.2.1/".equals(uri.toString())
               || resolveAddress("/read-timeout").toString().equals(uri.toString())) {
             attributes.remove(NetworkAttributes.NETWORK_PROTOCOL_VERSION);
           }