diff --git a/CHANGELOG4.asciidoc b/CHANGELOG4.asciidoc
index 349c3cb419..9239f3caa1 100644
--- a/CHANGELOG4.asciidoc
+++ b/CHANGELOG4.asciidoc
@@ -3,6 +3,8 @@
 
 ==== Unreleased
 
+See the <<upgrade-to-v4>> guide.
+
 [float]
 ===== Breaking changes
 
diff --git a/examples/trace-http-request.js b/examples/trace-http-request.js
index 3af28be1ec..1b1aed7836 100755
--- a/examples/trace-http-request.js
+++ b/examples/trace-http-request.js
@@ -12,9 +12,6 @@
 
 const apm = require('../').start({
   serviceName: 'example-trace-http-request',
-  // Now that OpenTelemetry has been GA for a while, the Elastic-specific
-  // 'elastic-apm-traceparent' header is rarely needed.
-  useElasticTraceparentHeader: false,
 });
 
 const http = require('http');
diff --git a/examples/trace-http.js b/examples/trace-http.js
index 2582022219..3de6f3b4ab 100755
--- a/examples/trace-http.js
+++ b/examples/trace-http.js
@@ -17,7 +17,6 @@
 
 require('../').start({
   serviceName: 'example-trace-http',
-  useElasticTraceparentHeader: false,
   // 'usePathAsTransactionName' can be useful when not using a web framework
   // with a router. See the following for details:
   // https://www.elastic.co/guide/en/apm/agent/nodejs/current/custom-stack.html#custom-stack-route-naming
diff --git a/test/types/index.ts b/test/types/index.ts
index fc288a2455..d17b40fbff 100644
--- a/test/types/index.ts
+++ b/test/types/index.ts
@@ -21,7 +21,7 @@ import assert from 'assert'
 
 const agentOpts: AgentConfigOptions = {
   captureExceptions: false,
-  metricsInterval: '0',
+  metricsInterval: '0s',
   centralConfig: false
 }
 apm.start(agentOpts)