diff --git a/agents/grpc/src/grpc_agent.cc b/agents/grpc/src/grpc_agent.cc
index 9b197a078c5..2ce36e55cc9 100644
--- a/agents/grpc/src/grpc_agent.cc
+++ b/agents/grpc/src/grpc_agent.cc
@@ -9,6 +9,7 @@
 #include "absl/log/initialize.h"
 #include "opentelemetry/sdk/metrics/data/metric_data.h"
 #include "opentelemetry/sdk/metrics/export/metric_producer.h"
+#include "opentelemetry/sdk/resource/semantic_conventions.h"
 #include "opentelemetry/exporters/otlp/otlp_grpc_client.h"
 #include "opentelemetry/exporters/otlp/otlp_grpc_client_factory.h"
 #include "opentelemetry/exporters/otlp/otlp_grpc_exporter.h"
@@ -33,6 +34,7 @@ using opentelemetry::sdk::metrics::ResourceMetrics;
 using opentelemetry::sdk::metrics::ScopeMetrics;
 using opentelemetry::sdk::resource::Resource;
 using opentelemetry::sdk::resource::ResourceAttributes;
+using opentelemetry::sdk::resource::SemanticConventions::kServiceName;
 using opentelemetry::sdk::trace::Recordable;
 using opentelemetry::v1::exporter::otlp::OtlpGrpcClient;
 using opentelemetry::v1::exporter::otlp::OtlpGrpcClientFactory;
@@ -1110,6 +1112,18 @@ int GrpcAgent::config(const json& config) {
     setup_blocked_loop_hooks();
   }
 
+  if (utils::find_any_fields_in_diff(diff, { "/app" })) {
+    auto it = config_.find("app");
+    if (it != config_.end()) {
+      std::string app_name = it->get<std::string>();
+      ResourceAttributes attrs = {
+        { kServiceName, app_name },
+      };
+
+      USE(otlp::UpdateResource(std::move(attrs)));
+    }
+  }
+
   // Configure tracing flags
   if (trace_flags_ == 0 ||
       utils::find_any_fields_in_diff(diff, tracing_fields)) {
diff --git a/agents/otlp/src/otlp_agent.cc b/agents/otlp/src/otlp_agent.cc
index cbbd17553d6..95637de53f3 100644
--- a/agents/otlp/src/otlp_agent.cc
+++ b/agents/otlp/src/otlp_agent.cc
@@ -30,6 +30,7 @@ namespace trace = OPENTELEMETRY_NAMESPACE::trace;
 namespace resource = sdk::resource;
 namespace instrumentationscope = sdk::instrumentationscope;
 namespace detail = trace::propagation::detail;
+using resource::ResourceAttributes;
 using resource::SemanticConventions::kServiceName;
 using resource::SemanticConventions::kServiceInstanceId;
 using resource::SemanticConventions::kServiceVersion;
@@ -170,6 +171,18 @@ int OTLPAgent::config(const nlohmann::json& config) {
     config_otlp_agent(config_);
   }
 
+  if (utils::find_any_fields_in_diff(diff, { "/app" })) {
+    auto it = config_.find("app");
+    if (it != config_.end()) {
+      std::string app_name = it->get<std::string>();
+      ResourceAttributes attrs = {
+        { kServiceName, app_name },
+      };
+
+      USE(otlp::UpdateResource(std::move(attrs)));
+    }
+  }
+
   // Configure tracing flags
   if (span_collector_ == nullptr ||
       utils::find_any_fields_in_diff(diff, tracing_fields)) {
diff --git a/agents/otlp/src/otlp_common.cc b/agents/otlp/src/otlp_common.cc
index ed84132b49c..e52d19e9095 100644
--- a/agents/otlp/src/otlp_common.cc
+++ b/agents/otlp/src/otlp_common.cc
@@ -170,7 +170,8 @@ Resource* UpdateResource(ResourceAttributes&& attrs) {
   // value "unknown_service". (See Resource::Create() method in the SDK).
   auto resource = GetResource();
   auto attributes = resource->GetAttributes();
-  if (attributes.find(kServiceName) != attributes.end()) {
+  if (attributes.find(kServiceName) != attributes.end() &&
+      attrs.find(kServiceName) == attrs.end()) {
     attrs.SetAttribute(kServiceName,
                        std::get<std::string>(attributes[kServiceName]));
   }
diff --git a/agents/zmq/src/zmq_agent.cc b/agents/zmq/src/zmq_agent.cc
index fff069ece7a..dbf81ba50d8 100644
--- a/agents/zmq/src/zmq_agent.cc
+++ b/agents/zmq/src/zmq_agent.cc
@@ -78,6 +78,7 @@ constexpr size_t span_msg_q_min_size = 200;
 
 const char MSG_1[] = "{"
   "\"agentId\":\"%s\""
+  ",\"app\":\"%s\""
   ",\"requestId\": \"%s\""
   ",\"command\":\"%s\""
   ",\"recorded\":{\"seconds\":%" PRIu64",\"nanoseconds\":%" PRIu64"}"
@@ -89,6 +90,7 @@ const char MSG_1[] = "{"
 
 const char MSG_2[] = "{"
   "\"agentId\":\"%s\""
+  ",\"app\":\"%s\""
   ",\"requestId\": null"
   ",\"command\":\"%s\""
   ",\"recorded\":{\"seconds\":%" PRIu64",\"nanoseconds\":%" PRIu64"}"
@@ -100,6 +102,7 @@ const char MSG_2[] = "{"
 
 const char MSG_3[] = "{"
   "\"agentId\":\"%s\""
+  ",\"app\":\"%s\""
   ",\"requestId\": \"%s\""
   ",\"command\":\"%s\""
   ",\"duration\":%" PRIu64
@@ -111,6 +114,7 @@ const char MSG_3[] = "{"
 
 const char MSG_4[] = "{"
   "\"agentId\":\"%s\""
+  ",\"app\":\"%s\""
   ",\"requestId\": \"%s\""
   ",\"command\":\"%s\""
   ",\"recorded\":{\"seconds\":%" PRIu64",\"nanoseconds\":%" PRIu64"}"
@@ -120,6 +124,7 @@ const char MSG_4[] = "{"
 
 const char MSG_5[] = "{"
   "\"agentId\":\"%s\""
+  ",\"app\":\"%s\""
   ",\"recorded\":{\"seconds\":%" PRIu64",\"nanoseconds\":%" PRIu64"}"
   ",\"version\":%d"
   ",\"error\":{\"message\":\"%s\",\"code\":%d}"
@@ -127,6 +132,7 @@ const char MSG_5[] = "{"
 
 const char MSG_6[] = "{"
   "\"agentId\":\"%s\""
+  ",\"app\":\"%s\""
   ",\"command\":\"exit\""
   ",\"exit_code\":%d"
   ",\"version\":%d"
@@ -136,6 +142,7 @@ const char MSG_6[] = "{"
 
 const char MSG_7[] = "{"
   "\"agentId\":\"%s\""
+  ",\"app\":\"%s\""
   ",\"command\":\"exit\""
   ",\"exit_code\":%d"
   ",\"version\":%d"
@@ -1077,6 +1084,7 @@ int ZmqAgent::send_command_message(const char* command,
                  msg_size_,
                  MSG_2,
                  agent_id_.c_str(),
+                 app_name_.c_str(),
                  command,
                  std::get<0>(recorded),
                  std::get<1>(recorded),
@@ -1090,6 +1098,7 @@ int ZmqAgent::send_command_message(const char* command,
                  msg_size_,
                  MSG_1,
                  agent_id_.c_str(),
+                 app_name_.c_str(),
                  request_id,
                  command,
                  std::get<0>(recorded),
@@ -1271,6 +1280,13 @@ int ZmqAgent::config(const json& config) {
     setup_blocked_loop_hooks();
   }
 
+  if (utils::find_any_fields_in_diff(diff, { "/app" })) {
+    auto it = config_.find("app");
+    if (it != config_.end()) {
+      app_name_ = it->get<std::string>();
+    }
+  }
+
   // Don't config other endpoints if command handle is not to be configured
   if (command_handle_ != nullptr) {
     if (ZmqHandle::needs_reset(diff, ZmqDataHandle::restart_fields)) {
@@ -1555,6 +1571,7 @@ void ZmqAgent::send_error_message(const std::string& msg,
                    msg_size_,
                    MSG_5,
                    agent_id_.c_str(),
+                   app_name_.c_str(),
                    std::get<0>(recorded),
                    std::get<1>(recorded),
                    version_,
@@ -1571,6 +1588,7 @@ void ZmqAgent::send_error_message(const std::string& msg,
                  msg_size_,
                  MSG_5,
                  agent_id_.c_str(),
+                 app_name_.c_str(),
                  std::get<0>(recorded),
                  std::get<1>(recorded),
                  version_,
@@ -1594,6 +1612,7 @@ int ZmqAgent::send_error_command_message(const std::string& req_id,
                    msg_size_,
                    MSG_4,
                    agent_id_.c_str(),
+                   app_name_.c_str(),
                    req_id.c_str(),
                    command.c_str(),
                    std::get<0>(recorded),
@@ -1612,6 +1631,7 @@ int ZmqAgent::send_error_command_message(const std::string& req_id,
                  msg_size_,
                  MSG_4,
                  agent_id_.c_str(),
+                 app_name_.c_str(),
                  req_id.c_str(),
                  command.c_str(),
                  std::get<0>(recorded),
@@ -1664,6 +1684,7 @@ void ZmqAgent::send_exit() {
                  msg_size_,
                  MSG_7,
                  agent_id_.c_str(),
+                 app_name_.c_str(),
                  exit_code,
                  version_,
                  profile);
@@ -1675,6 +1696,7 @@ void ZmqAgent::send_exit() {
                  msg_size_,
                  MSG_6,
                  agent_id_.c_str(),
+                 app_name_.c_str(),
                  exit_code,
                  version_,
                  jmsg.dump().c_str(),
@@ -2064,6 +2086,7 @@ void ZmqAgent::do_got_prof(ProfileType type,
              msg_size_,
              MSG_3,
              agent_id_.c_str(),
+             app_name_.c_str(),
              prof_stor.req_id.c_str(),
              cmd,
              uv_now(&loop_) - prof_stor.timestamp,
diff --git a/agents/zmq/src/zmq_agent.h b/agents/zmq/src/zmq_agent.h
index 901837c7865..eed1aa48b5c 100644
--- a/agents/zmq/src/zmq_agent.h
+++ b/agents/zmq/src/zmq_agent.h
@@ -682,6 +682,7 @@ class ZmqAgent {
   std::atomic<bool> exiting_;
 
   const std::string agent_id_;
+  std::string app_name_;
 
   // For Auth
   std::string auth_url_;
diff --git a/test/agents/test-grpc-metrics.mjs b/test/agents/test-grpc-metrics.mjs
index dd57e62e9bc..5960e260694 100644
--- a/test/agents/test-grpc-metrics.mjs
+++ b/test/agents/test-grpc-metrics.mjs
@@ -237,9 +237,10 @@ async function runTest({ getEnv }) {
       };
       const child = new TestClient([], opts);
       const agentId = await child.id();
-      const config = await child.config();
+      const config = await child.config({ app: 'my_app_name', interval: 100 });
       grpcServer.once('metrics', mustCall(async () => {
         const metrics = await child.metrics();
+        assert.strictEqual(config.app, 'my_app_name');
         const { data, requestId } = await grpcServer.metrics(agentId);
         checkMetricsData(data.msg, data.metadata, requestId, agentId, config, metrics);
         await child.shutdown(0);
@@ -257,7 +258,7 @@ const testConfigs = [
         NODE_DEBUG_NATIVE: 'nsolid_grpc_agent',
         NSOLID_GRPC_INSECURE: 1,
         NSOLID_GRPC: `localhost:${port}`,
-        NSOLID_INTERVAL: 100,
+        NSOLID_INTERVAL: 10000,
       };
     },
   },
diff --git a/test/agents/test-otlp-metrics.mjs b/test/agents/test-otlp-metrics.mjs
index cbbb003df62..10245e6a03d 100644
--- a/test/agents/test-otlp-metrics.mjs
+++ b/test/agents/test-otlp-metrics.mjs
@@ -17,6 +17,7 @@ const {
 } = validators;
 
 const __filename = fileURLToPath(import.meta.url);
+const appName = 'my_app_name';
 
 if (process.argv[2] === 'child') {
   // Just to keep the worker alive.
@@ -26,6 +27,7 @@ if (process.argv[2] === 'child') {
   if (isMainThread) {
     nsolid.start({
       tracingEnabled: false,
+      app: appName,
     });
 
     nsolid.setThreadName('main-thread');
@@ -601,6 +603,7 @@ if (process.argv[2] === 'child') {
           if (message.type === 'nsolid') {
             nsolidId = message.id;
             nsolidAppName = message.appName;
+            assert.strictEqual(nsolidAppName, appName);
             nsolidMetrics = message.metrics;
           } else if (message.type === 'workerThreadId') {
             context.threadList.push(message.id);
diff --git a/test/agents/test-zmq-info.mjs b/test/agents/test-zmq-info.mjs
index 4071590d7e9..2391c97376e 100644
--- a/test/agents/test-zmq-info.mjs
+++ b/test/agents/test-zmq-info.mjs
@@ -61,6 +61,7 @@ import { TestPlayground } from '../common/nsolid-zmq-agent/index.js';
 function checkInfoData(info, requestId, agentId, nsolidConfig = {}) {
   assert.strictEqual(info.requestId, requestId);
   assert.strictEqual(info.agentId, agentId);
+  assert.strictEqual(info.app, nsolidConfig.appName || 'untitled application');
   assert.strictEqual(info.command, 'info');
   // From here check at least that all the fields are present
   assert.ok(info.recorded);
diff --git a/test/agents/test-zmq-metrics.mjs b/test/agents/test-zmq-metrics.mjs
index 368f65e0e0f..3c2f2ba8bf0 100644
--- a/test/agents/test-zmq-metrics.mjs
+++ b/test/agents/test-zmq-metrics.mjs
@@ -223,6 +223,7 @@ function checkMetricsData(metrics, requestId, agentId, threads) {
   console.dir(metrics, { depth: null });
   assert.strictEqual(metrics.requestId, requestId);
   assert.strictEqual(metrics.agentId, agentId);
+  assert.strictEqual(metrics.app, 'untitled application');
   assert.strictEqual(metrics.command, 'metrics');
   // From here check at least that all the fields are present
   assert.ok(metrics.recorded);
diff --git a/test/agents/test-zmq-packages.mjs b/test/agents/test-zmq-packages.mjs
index 818197c5108..e3dfcacbedc 100644
--- a/test/agents/test-zmq-packages.mjs
+++ b/test/agents/test-zmq-packages.mjs
@@ -129,6 +129,7 @@ const expectedPackagesMains = [
 function checkPackagesData(packages, requestId, agentId) {
   assert.strictEqual(packages.requestId, requestId);
   assert.strictEqual(packages.agentId, agentId);
+  assert.strictEqual(packages.app, 'untitled application');
   assert.strictEqual(packages.command, 'packages');
   // From here check at least that all the fields are present
   assert.ok(packages.recorded);
diff --git a/test/agents/test-zmq-ping.mjs b/test/agents/test-zmq-ping.mjs
index e0851c75c5b..1b8b5d944ee 100644
--- a/test/agents/test-zmq-ping.mjs
+++ b/test/agents/test-zmq-ping.mjs
@@ -29,6 +29,7 @@ function checkPingData(data, requestId, agentId) {
   console.dir(data, { depth: null });
   assert.strictEqual(data.requestId, requestId);
   assert.strictEqual(data.agentId, agentId);
+  assert.strictEqual(data.app, 'untitled application');
   assert.strictEqual(data.command, 'ping');
   // From here check at least that all the fields are present
   validateObject(data.recorded, 'recorded');
diff --git a/test/agents/test-zmq-profile.mjs b/test/agents/test-zmq-profile.mjs
index 62fc200828a..6c699aeeca1 100644
--- a/test/agents/test-zmq-profile.mjs
+++ b/test/agents/test-zmq-profile.mjs
@@ -22,6 +22,7 @@ import {
 function checkProfileData(requestId, options, agentId, data, complete, onExit = false) {
   assert.strictEqual(data.requestId, requestId);
   assert.strictEqual(data.agentId, agentId);
+  assert.strictEqual(data.app, 'untitled application');
   assert.strictEqual(data.command, 'profile');
   if (onExit) {
     assert.ok(data.duration < options.duration);
diff --git a/test/agents/test-zmq-reconfigure.mjs b/test/agents/test-zmq-reconfigure.mjs
index 03ac94b0793..5f577f05d86 100644
--- a/test/agents/test-zmq-reconfigure.mjs
+++ b/test/agents/test-zmq-reconfigure.mjs
@@ -44,6 +44,7 @@ const {
 function checkReconfigureData(reconfigure, requestId, agentId, nsolidConfig) {
   assert.strictEqual(reconfigure.requestId, requestId);
   assert.strictEqual(reconfigure.agentId, agentId);
+  assert.strictEqual(reconfigure.app, 'untitled application');
   assert.strictEqual(reconfigure.command, 'reconfigure');
   // From here check at least that all the fields are present
   validateObject(reconfigure.recorded, 'recorded');
diff --git a/test/agents/test-zmq-snapshot.mjs b/test/agents/test-zmq-snapshot.mjs
index f32470db7eb..0d07f676e05 100644
--- a/test/agents/test-zmq-snapshot.mjs
+++ b/test/agents/test-zmq-snapshot.mjs
@@ -18,6 +18,7 @@ import { TestPlayground } from '../common/nsolid-zmq-agent/index.js';
 function checkSnapshotData(requestId, options, agentId, data, complete) {
   assert.strictEqual(data.requestId, requestId);
   assert.strictEqual(data.agentId, agentId);
+  assert.strictEqual(data.app, 'untitled application');
   assert.strictEqual(data.command, 'snapshot');
   assert.strictEqual(data.complete, complete);
   assert.strictEqual(data.threadId, options.threadId);
diff --git a/test/agents/test-zmq-startup-times.mjs b/test/agents/test-zmq-startup-times.mjs
index e83a2aba819..9baf5dca17c 100644
--- a/test/agents/test-zmq-startup-times.mjs
+++ b/test/agents/test-zmq-startup-times.mjs
@@ -36,6 +36,7 @@ const {
 function checkStartupTimesData(data, requestId, agentId, additionalTimes = []) {
   assert.strictEqual(data.requestId, requestId);
   assert.strictEqual(data.agentId, agentId);
+  assert.strictEqual(data.app, 'untitled application');
   assert.strictEqual(data.command, 'startup_times');
   // From here check at least that all the fields are present
   validateObject(data.recorded, 'recorded');
diff --git a/test/agents/test-zmq-tracing.mjs b/test/agents/test-zmq-tracing.mjs
index 3e91cb89e54..6916cf287d7 100644
--- a/test/agents/test-zmq-tracing.mjs
+++ b/test/agents/test-zmq-tracing.mjs
@@ -69,10 +69,11 @@ const {
 //   timeNS: '1704988827304585184'
 // }
 
-function checkTracingData(tracing, requestId, agentId, threadId) {
+function checkTracingData(tracing, requestId, agentId, threadId, appName) {
   console.dir(tracing, { depth: null });
   assert.strictEqual(tracing.requestId, requestId);
   assert.strictEqual(tracing.agentId, agentId);
+  assert.strictEqual(tracing.app, appName);
   assert.strictEqual(tracing.command, 'tracing');
   // From here check at least that all the fields are present
   validateObject(tracing.recorded, 'recorded');
@@ -175,7 +176,12 @@ tests.push({
     return new Promise((resolve) => {
       let totalSpans = 0;
       const opts = {
-        opts: { env: { NSOLID_TRACING_ENABLED: 1 } },
+        opts: {
+          env: {
+            NSOLID_TRACING_ENABLED: 1,
+            NSOLID_APPNAME: 'myapp',
+          },
+        },
       };
 
       playground.bootstrap(opts, mustSucceed(async (agentId) => {
@@ -183,7 +189,7 @@ tests.push({
       }), mustCallAtLeast((eventType, agentId, data) => {
         console.log(`${eventType}, ${agentId}`);
         assert.strictEqual(eventType, 'agent-tracing');
-        checkTracingData(data, null, agentId, threadId);
+        checkTracingData(data, null, agentId, threadId, 'myapp');
         const spanTypes = [ 'http_server', 'http_client'];
         for (const span of data.body.spans) {
           validateSpan(span, spanTypes[totalSpans], threadId);
@@ -204,14 +210,19 @@ tests.push({
       let totalSpans = 0;
       const opts = {
         args: [ '-t', 'http' ],
-        opts: { env: { NSOLID_TRACING_ENABLED: 1 } },
+        opts: {
+          env: {
+            NSOLID_TRACING_ENABLED: 1,
+            NSOLID_APPNAME: 'myapp',
+          },
+        },
       };
 
       playground.bootstrap(opts, mustSucceed(() => {
       }), mustCallAtLeast((eventType, agentId, data) => {
         console.log(`${eventType}, ${agentId}`);
         assert.strictEqual(eventType, 'agent-tracing');
-        checkTracingData(data, null, agentId, threadId);
+        checkTracingData(data, null, agentId, threadId, 'myapp');
         const spanTypes = [ 'http_server', 'http_client'];
         for (const span of data.body.spans) {
           validateSpan(span, spanTypes[totalSpans], threadId);
@@ -233,7 +244,12 @@ tests.push({
       let totalSpans = 0;
       const opts = {
         args: [ '-w', 1 ],
-        opts: { env: { NSOLID_TRACING_ENABLED: 1 } },
+        opts: {
+          env: {
+            NSOLID_TRACING_ENABLED: 1,
+            NSOLID_APPNAME: 'myapp',
+          },
+        },
       };
 
       playground.bootstrap(opts, mustSucceed(async (agentId) => {
@@ -243,7 +259,7 @@ tests.push({
       }), mustCallAtLeast((eventType, agentId, data) => {
         console.log(`${eventType}, ${agentId}`);
         assert.strictEqual(eventType, 'agent-tracing');
-        checkTracingData(data, null, agentId, wid);
+        checkTracingData(data, null, agentId, wid, 'myapp');
         const spanTypes = [ 'http_server', 'http_client'];
         for (const span of data.body.spans) {
           validateSpan(span, spanTypes[totalSpans], wid);
@@ -263,7 +279,12 @@ tests.push({
     return new Promise((resolve) => {
       let totalSpans = 0;
       const opts = {
-        opts: { env: { NSOLID_TRACING_ENABLED: 1 } },
+        opts: {
+          env: {
+            NSOLID_TRACING_ENABLED: 1,
+            NSOLID_APPNAME: 'myapp',
+          },
+        },
       };
 
       playground.bootstrap(opts, mustSucceed(async (agentId) => {
@@ -271,7 +292,7 @@ tests.push({
       }), mustCallAtLeast((eventType, agentId, data) => {
         console.log(`${eventType}, ${agentId}`);
         assert.strictEqual(eventType, 'agent-tracing');
-        checkTracingData(data, null, agentId, threadId);
+        checkTracingData(data, null, agentId, threadId, 'myapp');
         const spanTypes = [ 'dns_lookup', 'dns_lookup_service', 'dns_resolve'];
         for (const span of data.body.spans) {
           validateSpan(span, spanTypes[totalSpans], threadId);
@@ -293,7 +314,12 @@ tests.push({
       let totalSpans = 0;
       const opts = {
         args: [ '-w', 1 ],
-        opts: { env: { NSOLID_TRACING_ENABLED: 1 } },
+        opts: {
+          env: {
+            NSOLID_TRACING_ENABLED: 1,
+            NSOLID_APPNAME: 'myapp',
+          },
+        },
       };
 
       playground.bootstrap(opts, mustSucceed(async (agentId) => {
@@ -303,7 +329,7 @@ tests.push({
       }), mustCallAtLeast((eventType, agentId, data) => {
         console.log(`${eventType}, ${agentId}`);
         assert.strictEqual(eventType, 'agent-tracing');
-        checkTracingData(data, null, agentId, wid);
+        checkTracingData(data, null, agentId, wid, 'myapp');
         const spanTypes = [ 'dns_lookup', 'dns_lookup_service', 'dns_resolve'];
         for (const span of data.body.spans) {
           validateSpan(span, spanTypes[totalSpans], wid);
@@ -318,19 +344,25 @@ tests.push({
 });
 
 tests.push({
-  name: 'should work for custom traces',
+  name: 'should work for custom traces changing app name',
   test: async (playground) => {
     return new Promise((resolve) => {
       const opts = {
-        opts: { env: { NSOLID_TRACING_ENABLED: 1 } },
+        opts: {
+          env: {
+            NSOLID_TRACING_ENABLED: 1,
+            NSOLID_APPNAME: 'myapp',
+          },
+        },
       };
 
       playground.bootstrap(opts, mustSucceed(async (agentId) => {
+        await playground.client.config({ app: 'myotherapp' });
         await playground.client.tracing('custom', threadId);
       }), mustCall((eventType, agentId, data) => {
         console.log(`${eventType}, ${agentId}`);
         assert.strictEqual(eventType, 'agent-tracing');
-        checkTracingData(data, null, agentId, threadId);
+        checkTracingData(data, null, agentId, threadId, 'myotherapp');
         assert.strictEqual(data.body.spans.length, 1);
         validateSpan(data.body.spans[0], 'custom', threadId);
         resolve();
@@ -346,7 +378,12 @@ tests.push({
       let wid;
       const opts = {
         args: [ '-w', 1 ],
-        opts: { env: { NSOLID_TRACING_ENABLED: 1 } },
+        opts: {
+          env: {
+            NSOLID_TRACING_ENABLED: 1,
+            NSOLID_APPNAME: 'myapp',
+          },
+        },
       };
 
       playground.bootstrap(opts, mustSucceed(async (agentId) => {
@@ -356,7 +393,7 @@ tests.push({
       }), mustCall((eventType, agentId, data) => {
         console.log(`${eventType}, ${agentId}`);
         assert.strictEqual(eventType, 'agent-tracing');
-        checkTracingData(data, null, agentId, wid);
+        checkTracingData(data, null, agentId, wid, 'myapp');
         assert.strictEqual(data.body.spans.length, 1);
         validateSpan(data.body.spans[0], 'custom', wid);
         resolve();
diff --git a/test/common/nsolid-grpc-agent/client.js b/test/common/nsolid-grpc-agent/client.js
index 5aef9633d6d..0145b52b504 100644
--- a/test/common/nsolid-grpc-agent/client.js
+++ b/test/common/nsolid-grpc-agent/client.js
@@ -110,6 +110,10 @@ if (isMainThread) {
         workers.get(msg.threadId).postMessage(msg);
       }
     } else if (msg.type === 'config') {
+      if (msg.config) {
+        nsolid.start(msg.config);
+      }
+
       process.send({ type: 'config', config: nsolid.config });
     } else if (msg.type === 'heap_profile') {
       nsolid.heapProfile(msg.duration);
diff --git a/test/common/nsolid-grpc-agent/index.js b/test/common/nsolid-grpc-agent/index.js
index eb2abcbc0fd..92ae6320956 100644
--- a/test/common/nsolid-grpc-agent/index.js
+++ b/test/common/nsolid-grpc-agent/index.js
@@ -315,15 +315,15 @@ class TestClient {
     });
   }
 
-  async config() {
+  async config(config = null) {
     return new Promise((resolve) => {
       if (this.#child) {
-        this.#child.send({ type: 'config' });
-        this.#child.once('message', common.mustCall((msg) => {
+        this.#child.send({ type: 'config', config });
+        this.#child.on('message', (msg) => {
           if (msg.type === 'config') {
             resolve(msg.config);
           }
-        }));
+        });
       } else {
         resolve(null);
       }
diff --git a/test/common/nsolid-zmq-agent/client.js b/test/common/nsolid-zmq-agent/client.js
index c09a3a3c5f3..60bb14db913 100644
--- a/test/common/nsolid-zmq-agent/client.js
+++ b/test/common/nsolid-zmq-agent/client.js
@@ -104,6 +104,10 @@ if (isMainThread) {
         workers.get(msg.threadId).postMessage(msg);
       }
     } else if (msg.type === 'config') {
+      if (msg.config) {
+        nsolid.start(msg.config);
+      }
+
       process.send({ type: 'config', config: nsolid.config });
     } else if (msg.type === 'shutdown') {
       clearInterval(interval);
diff --git a/test/common/nsolid-zmq-agent/index.js b/test/common/nsolid-zmq-agent/index.js
index 293ba805ef1..ce00672e957 100644
--- a/test/common/nsolid-zmq-agent/index.js
+++ b/test/common/nsolid-zmq-agent/index.js
@@ -75,10 +75,10 @@ class TestClient {
     });
   }
 
-  async config() {
+  async config(config = null) {
     return new Promise((resolve) => {
       if (this.#child) {
-        this.#child.send({ type: 'config' });
+        this.#child.send({ type: 'config', config });
         this.#child.once('message', common.mustCall((msg) => {
           if (msg.type === 'config') {
             resolve(msg.config);