diff --git a/soft-navigation-heuristics/smoke/tentative/late-url-change.html b/soft-navigation-heuristics/smoke/tentative/late-url-change.html
index 5526eca7d76bca..a626730cc36ae6 100644
--- a/soft-navigation-heuristics/smoke/tentative/late-url-change.html
+++ b/soft-navigation-heuristics/smoke/tentative/late-url-change.html
@@ -14,7 +14,7 @@
     const URL = '/late-url-change';
 
     navigateButton.addEventListener("click", async () => {
-      content.innerHTML = '<img src="/images/lcp-256x256.png" elementtiming="test-image"></img>';
+      content.innerHTML = '<img id="target" src="/images/lcp-256x256.png" elementtiming="test-image"></img>';
 
       const entries = await new Promise(resolve => {
         new PerformanceObserver((list, observer) => {
@@ -31,6 +31,8 @@
 
     const softNavPromise =
         SoftNavigationTestHelper.getPerformanceEntries("soft-navigation");
+    const icpPromise =
+        SoftNavigationTestHelper.getPerformanceEntries("interaction-contentful-paint");
 
     if (test_driver) {
       test_driver.click(navigateButton);
@@ -43,5 +45,10 @@
     assert_true(
         entries[0].name.endsWith(URL),
         'Unexpected Soft Navigation URL.');
+
+    const icps = await helper.withTimeoutMessage(
+        icpPromise, 'ICP not detected.', /*timeout=*/ 3000);
+    assert_equals(icps.length, 1, 'Expected exactly one ICP entry.');
+    assert_equals(icps[0].id, 'target', 'Expected ICP candidate to be "target"');
   }, 'Soft Navigation Detection supports setting URL after paint');
 </script>