diff --git a/testing/web-platform/meta/MANIFEST.json b/testing/web-platform/meta/MANIFEST.json
index 7e07cc25768b..6ea5feedf7b5 100644
--- a/testing/web-platform/meta/MANIFEST.json
+++ b/testing/web-platform/meta/MANIFEST.json
@@ -36389,6 +36389,12 @@
             "url": "/editing/run/multitest.html"
           }
         ],
+        "webaudio/the-audio-api/the-audioparam-interface/setTargetAtTime-after-event-within-block.html": [
+          {
+            "path": "webaudio/the-audio-api/the-audioparam-interface/setTargetAtTime-after-event-within-block.html",
+            "url": "/webaudio/the-audio-api/the-audioparam-interface/setTargetAtTime-after-event-within-block.html"
+          }
+        ],
         "webaudio/the-audio-api/the-audioparam-interface/setValueAtTime-within-block.html": [
           {
             "path": "webaudio/the-audio-api/the-audioparam-interface/setValueAtTime-within-block.html",
diff --git a/testing/web-platform/tests/webaudio/the-audio-api/the-audioparam-interface/setTargetAtTime-after-event-within-block.html b/testing/web-platform/tests/webaudio/the-audio-api/the-audioparam-interface/setTargetAtTime-after-event-within-block.html
new file mode 100644
index 000000000000..827aeeabd479
--- /dev/null
+++ b/testing/web-platform/tests/webaudio/the-audio-api/the-audioparam-interface/setTargetAtTime-after-event-within-block.html
@@ -0,0 +1,54 @@
+<!DOCTYPE html>
+<title>Test setTargetAtTime after an event in the same processing block</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script>
+promise_test(function() {
+  const bufferSize = 179;
+  const valueStartOffset = 42;
+  const targetStartOffset = 53;
+  const sampleRate = 48000;
+  const scheduledValue = -0.5;
+
+  var context = new OfflineAudioContext(1, bufferSize, sampleRate);
+
+  var gain = context.createGain();
+  gain.gain.setValueAtTime(scheduledValue, valueStartOffset/sampleRate);
+  gain.gain.setTargetAtTime(scheduledValue, targetStartOffset/sampleRate,
+                            128/sampleRate);
+  gain.connect(context.destination);
+
+  // Apply unit DC signal to gain node.
+  var source = context.createBufferSource();
+  source.buffer =
+    function() {
+      var buffer = context.createBuffer(1, 1, context.sampleRate);
+      buffer.getChannelData(0)[0] = 1.0;
+      return buffer;
+    }();
+  source.loop = true;
+  source.start();
+  source.connect(gain);
+
+  return context.startRendering().
+    then(function(buffer) {
+      assert_equals(buffer.length, bufferSize, "output buffer length");
+      var output = buffer.getChannelData(0);
+      var i = 0;
+      for (; i < valueStartOffset; ++i) {
+        // "Its default value is 1."
+        assert_equals(output[i], 1.0, "default gain at sample " + i);
+      }
+      for (; i < buffer.length; ++i) {
+        // "If the next event (having time T1) after this SetValue event is
+        // not of type LinearRampToValue or ExponentialRampToValue, then, for
+        // T0≤t<T1: v(t)=V".
+        // "Start exponentially approaching the target value at the given time
+        // with a rate having the given time constant."
+        // The target is the same value, and so the SetValue value continues.
+        assert_equals(output[i], scheduledValue,
+                      "scheduled value at sample " + i);
+      }
+    });
+});
+</script>
