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diff --git a/testing/web-platform/tests/IndexedDB/fire-error-event-exception.html b/testing/web-platform/tests/IndexedDB/fire-error-event-exception.html
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index 0000000000..f380e4081f
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+++ b/testing/web-platform/tests/IndexedDB/fire-error-event-exception.html
@@ -0,0 +1,181 @@
+<!DOCTYPE html>
+<meta charset=utf-8>
+<title>Fire error event - Exception thrown</title>
+<link rel="help" href="https://w3c.github.io/IndexedDB/#fire-error-event">
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script src=resources/support.js></script>
+<script>
+setup({allow_uncaught_exception:true});
+
+function fire_error_event_test(func, description) {
+  indexeddb_test(
+    (t, db) => {
+      db.createObjectStore('s');
+    },
+    (t, db) => {
+      const tx = db.transaction('s', 'readwrite', {durability: 'relaxed'});
+      tx.oncomplete = t.unreached_func('transaction should abort');
+      const store = tx.objectStore('s');
+      store.put(0, 0);
+      const request = store.add(0, 0);
+      request.onsuccess = t.unreached_func('request should fail');
+      func(t, db, tx, request);
+      tx.addEventListener('abort', t.step_func_done(() => {
+        assert_equals(tx.error.name, 'AbortError');
+      }));
+    },
+    description);
+}
+
+// Listeners on the request.
+
+fire_error_event_test((t, db, tx, request) => {
+  request.onerror = () => {
+    throw Error();
+  };
+}, 'Exception in error event handler on request');
+
+fire_error_event_test((t, db, tx, request) => {
+  request.onerror = e => {
+    e.preventDefault();
+    throw Error();
+  };
+}, 'Exception in error event handler on request, with preventDefault');
+
+fire_error_event_test((t, db, tx, request) => {
+  request.addEventListener('error', () => {
+    throw Error();
+  });
+}, 'Exception in error event listener on request');
+
+fire_error_event_test((t, db, tx, request) => {
+  request.addEventListener('error', {
+    get handleEvent() {
+      throw new Error();
+    },
+  });
+}, 'Exception in error event listener ("handleEvent" lookup) on request');
+
+fire_error_event_test((t, db, tx, request) => {
+  request.addEventListener('error', {});
+}, 'Exception in error event listener (non-callable "handleEvent") on request');
+
+fire_error_event_test((t, db, tx, request) => {
+  request.addEventListener('error', () => {
+    // no-op
+  });
+  request.addEventListener('error', () => {
+    throw Error();
+  });
+}, 'Exception in second error event listener on request');
+
+fire_error_event_test((t, db, tx, request) => {
+  let second_listener_called = false;
+  request.addEventListener('error', () => {
+    throw Error();
+  });
+  request.addEventListener('error', t.step_func(() => {
+    second_listener_called = true;
+    assert_true(is_transaction_active(tx, 's'),
+                'Transaction should be active until dispatch completes');
+  }));
+  tx.addEventListener('abort', t.step_func(() => {
+    assert_true(second_listener_called);
+  }));
+}, 'Exception in first error event listener on request, ' +
+   'transaction active in second');
+
+// Listeners on the transaction.
+
+fire_error_event_test((t, db, tx, request) => {
+  tx.onerror = () => {
+    throw Error();
+  };
+}, 'Exception in error event handler on transaction');
+
+fire_error_event_test((t, db, tx, request) => {
+  tx.onerror = e => {
+    e.preventDefault();
+    throw Error();
+  };
+}, 'Exception in error event handler on transaction, with preventDefault');
+
+fire_error_event_test((t, db, tx, request) => {
+  tx.addEventListener('error', () => {
+    throw Error();
+  });
+}, 'Exception in error event listener on transaction');
+
+fire_error_event_test((t, db, tx, request) => {
+  tx.addEventListener('error', () => {
+    // no-op
+  });
+  tx.addEventListener('error', () => {
+    throw Error();
+  });
+}, 'Exception in second error event listener on transaction');
+
+fire_error_event_test((t, db, tx, request) => {
+  let second_listener_called = false;
+  tx.addEventListener('error', () => {
+    throw Error();
+  });
+  tx.addEventListener('error', t.step_func(() => {
+    second_listener_called = true;
+    assert_true(is_transaction_active(tx, 's'),
+                'Transaction should be active until dispatch completes');
+  }));
+  tx.addEventListener('abort', t.step_func(() => {
+    assert_true(second_listener_called);
+  }));
+}, 'Exception in first error event listener on transaction, ' +
+   'transaction active in second');
+
+// Listeners on the connection.
+
+fire_error_event_test((t, db, tx, request) => {
+  db.onerror = () => {
+    throw Error();
+  };
+}, 'Exception in error event handler on connection');
+
+fire_error_event_test((t, db, tx, request) => {
+  db.onerror = e => {
+    e.preventDefault()
+    throw Error();
+  };
+}, 'Exception in error event handler on connection, with preventDefault');
+
+fire_error_event_test((t, db, tx, request) => {
+  db.addEventListener('error', () => {
+    throw Error();
+  });
+}, 'Exception in error event listener on connection');
+
+fire_error_event_test((t, db, tx, request) => {
+  db.addEventListener('error', () => {
+    // no-op
+  });
+  db.addEventListener('error', () => {
+    throw Error();
+  });
+}, 'Exception in second error event listener on connection');
+
+fire_error_event_test((t, db, tx, request) => {
+  let second_listener_called = false;
+  db.addEventListener('error', () => {
+    throw Error();
+  });
+  db.addEventListener('error', t.step_func(() => {
+    second_listener_called = true;
+    assert_true(is_transaction_active(tx, 's'),
+                'Transaction should be active until dispatch completes');
+  }));
+  tx.addEventListener('abort', t.step_func(() => {
+    assert_true(second_listener_called);
+  }));
+}, 'Exception in first error event listener on connection, ' +
+   'transaction active in second');
+
+</script>