diff --git a/dom/media/gtest/TestTimeUnit.cpp b/dom/media/gtest/TestTimeUnit.cpp
deleted file mode 100644
index 605e0e90c902..000000000000
--- a/dom/media/gtest/TestTimeUnit.cpp
+++ /dev/null
@@ -1,22 +0,0 @@
-/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#include "gtest/gtest.h"
-#include "TimeUnits.h"
-#include <algorithm>
-#include <vector>
-
-using namespace mozilla;
-
-TEST(TimeUnit, Rounding)
-{
-  int64_t usecs = 66261715;
-  double seconds = media::TimeUnit::FromMicroseconds(usecs).ToSeconds();
-  EXPECT_EQ(media::TimeUnit::FromSeconds(seconds).ToMicroseconds(), usecs);
-
-  seconds = 4.169470;
-  usecs = 4169470;
-  EXPECT_EQ(media::TimeUnit::FromSeconds(seconds).ToMicroseconds(), usecs);
-}