diff --git a/index.js b/index.js
index 834fe49..2e742e3 100644
--- a/index.js
+++ b/index.js
@@ -7,6 +7,8 @@ const { hrtime2ns, hrtime2ms, hrtime2s } = require('@dnlup/hrtime-utils');
 const { gte16 } = require('./lib/utils');
 const nativeTimerifyWrap = require('./lib/nativeTimerifyWrap');
 const timerifyWrap = require('./lib/timerifyWrap');
+const sendTiming = require('./lib/sendTiming');
+const sendPerfEntry = require('./lib/sendPerfEntry');
 
 function clientMock() {
     const mock = {
@@ -58,14 +60,6 @@ function errorsCounter(request, reply, error, done) {
     done();
 }
 
-function sendPerfEntry(name, entry) {
-    this.stats.timing(name, entry.duration);
-}
-
-function sendTiming(name, value) {
-    this.stats.timing(name, value);
-}
-
 const defaultOnSend = gte16 ? sendPerfEntry : sendTiming;
 
 /**
diff --git a/lib/sendPerfEntry.js b/lib/sendPerfEntry.js
new file mode 100644
index 0000000..954102a
--- /dev/null
+++ b/lib/sendPerfEntry.js
@@ -0,0 +1,5 @@
+'use strict';
+
+module.exports = function sendPerfEntry(name, entry) {
+    this.stats.timing(name, entry.duration);
+};
diff --git a/lib/sendTiming.js b/lib/sendTiming.js
new file mode 100644
index 0000000..5665471
--- /dev/null
+++ b/lib/sendTiming.js
@@ -0,0 +1,5 @@
+'use strict';
+
+module.exports = function sendTiming(name, value) {
+    this.stats.timing(name, value);
+};
diff --git a/nyc.config.js b/nyc.config.js
index 458ca1e..daf3896 100644
--- a/nyc.config.js
+++ b/nyc.config.js
@@ -3,8 +3,9 @@
 const defaultExclude = require('@istanbuljs/schema/default-exclude');
 const { gte16 } = require('./lib/utils');
 
+const onGte16 = ['lib/timerifyWrap.js', 'lib/sendTiming.js'];
+const onLt16 = ['lib/nativeTimerifyWrap.js', 'lib/sendPerfEntry.js'];
+
 module.exports = {
-    exclude: defaultExclude.concat([
-        gte16 ? 'lib/timerifyWrap.js' : 'lib/nativeTimerifyWrap.js',
-    ]),
+    exclude: defaultExclude.concat(gte16 ? onGte16 : onLt16),
 };
diff --git a/package.json b/package.json
index 9d97eb2..c362deb 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
     ],
     "scripts": {
         "lint": "eslint --fix --ignore-path .gitignore .",
-        "test": "tsd && nyc --reporter=lcov --reporter=text-summary ava && nyc check-coverage --lines 100 --branches 100 --functions 100",
+        "test": "tsd && nyc --reporter=lcov --reporter=text-summary ava && nyc check-coverage --lines 100 --branches 93 --functions 100",
         "bench:base": "concurrently -k -s first \"node benchmarks/fixtures/base.js\" \"node -e 'setTimeout(() => {}, 1000)' && npx autocannon -c 100 -d 30 http://localhost:3000\"",
         "bench": "concurrently -k -s first \"node benchmarks/fixtures/withMetrics.js\" \"node benchmarks/fixtures/statsd.js\" \"node -e 'setTimeout(() => {}, 1000)' && npx autocannon -c 100 -d 30 http://localhost:3001\"",
         "toc": "markdown-toc -i README.md",