diff --git a/packages/github/index.js b/packages/github/index.js
index f5060be..97adf8c 100644
--- a/packages/github/index.js
+++ b/packages/github/index.js
@@ -89,7 +89,9 @@ module.exports = async function githubReporter(source) {
         counter.fail += 1;
         break;
       } case 'test:diagnostic':
-        if (event.data.nesting === 0) {
+        if (event.data.file === undefined
+          || event.data.line === undefined
+          || event.data.column === undefined) {
           diagnostics.push(event.data.message);
         } else {
           core.notice(event.data.message, extractLocation(event.data));
diff --git a/packages/github/tests/output.js b/packages/github/tests/output.js
index 914d7a2..5313c8c 100644
--- a/packages/github/tests/output.js
+++ b/packages/github/tests/output.js
@@ -19,12 +19,15 @@ module.exports = {
 ::debug::completed running is skipped
 ::debug::starting to run is a todo
 ::debug::completed running is a todo
-::group::Test results \\(3 passed, 2 failed\\)
-::notice::Total Tests: 7%0ASuites 📂: 2%0APassed ✅: 3%0AFailed ❌: 2%0ACanceled 🚫: 0%0ASkipped ⏭️: 1%0ATodo 📝: 1%0ADuration 🕐: .*ms
+::debug::starting to run top level diagnostic
+::debug::completed running top level diagnostic
+::notice file=tests/example.js,line=21,col=1::top level diagnostic
+::group::Test results \\(4 passed, 2 failed\\)
+::notice::Total Tests: 8%0ASuites 📂: 2%0APassed ✅: 4%0AFailed ❌: 2%0ACanceled 🚫: 0%0ASkipped ⏭️: 1%0ATodo 📝: 1%0ADuration 🕐: .*ms
 ::endgroup::
 `,
   summary: `<h1>Test Results</h1>
-<table><tr><td>Total Tests</td><td>7</td></tr><tr><td>Suites 📂</td><td>2</td></tr><tr><td>Passed ✅</td><td>3</td></tr><tr><td>Failed ❌</td><td>2</td></tr><tr><td>Canceled 🚫</td><td>0</td></tr><tr><td>Skipped ⏭️</td><td>1</td></tr><tr><td>Todo 📝</td><td>1</td></tr><tr><td>Duration 🕐</td><td>.*ms</td></tr></table>
+<table><tr><td>Total Tests</td><td>8</td></tr><tr><td>Suites 📂</td><td>2</td></tr><tr><td>Passed ✅</td><td>4</td></tr><tr><td>Failed ❌</td><td>2</td></tr><tr><td>Canceled 🚫</td><td>0</td></tr><tr><td>Skipped ⏭️</td><td>1</td></tr><tr><td>Todo 📝</td><td>1</td></tr><tr><td>Duration 🕐</td><td>.*ms</td></tr></table>
 `,
   overrides: {
     18: {
@@ -46,8 +49,11 @@ module.exports = {
 ::debug::completed running is skipped
 ::debug::starting to run is a todo
 ::debug::completed running is a todo
-::group::Test results \\(3 passed, 2 failed\\)
-::notice::Total Tests: 7%0ASuites 📂: 2%0APassed ✅: 3%0AFailed ❌: 2%0ACanceled 🚫: 0%0ASkipped ⏭️: 1%0ATodo 📝: 1%0ADuration 🕐: .*ms
+::debug::starting to run top level diagnostic
+::debug::completed running top level diagnostic
+::notice file=tests/example.js,line=21,col=1::top level diagnostic
+::group::Test results \\(4 passed, 2 failed\\)
+::notice::Total Tests: 8%0ASuites 📂: 2%0APassed ✅: 4%0AFailed ❌: 2%0ACanceled 🚫: 0%0ASkipped ⏭️: 1%0ATodo 📝: 1%0ADuration 🕐: .*ms
 ::endgroup::
 `,
     },
diff --git a/packages/junit/tests/output.js b/packages/junit/tests/output.js
index 6e6cc1c..b18389d 100644
--- a/packages/junit/tests/output.js
+++ b/packages/junit/tests/output.js
@@ -62,6 +62,7 @@ cause: AssertionError \\[ERR_ASSERTION\\]: The expression evaluated to a falsy v
 \t<testcase name="is a todo" time=".*" classname="test">
 \t\t<skipped type="todo" message="true"/>
 \t</testcase>
+\t<testcase name="top level diagnostic" time=".*" classname="test"/>
 </testsuites>
 `,
   overrides: {
@@ -127,6 +128,7 @@ code: 'ERR_TEST_FAILURE'
 \t<testcase name="is a todo" time=".*" classname="test">
 \t\t<skipped type="todo" message="true"/>
 \t</testcase>
+\t<testcase name="top level diagnostic" time=".*" classname="test"/>
 </testsuites>
 `,
     },
diff --git a/tests/example.js b/tests/example.js
index 7a0e9b7..da9e06b 100644
--- a/tests/example.js
+++ b/tests/example.js
@@ -17,3 +17,5 @@ describe('more tests', () => {
 });
 it.skip('is skipped', () => {});
 it.todo('is a todo');
+
+test('top level diagnostic', async (t) => { t.diagnostic('top level diagnostic'); });