diff --git a/quic/test_tools/quic_test_utils_test.cc b/quic/test_tools/quic_test_utils_test.cc
new file mode 100644
index 0000000..79d2af8
--- /dev/null
+++ b/quic/test_tools/quic_test_utils_test.cc
@@ -0,0 +1,61 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "net/third_party/quiche/src/quic/test_tools/quic_test_utils.h"
+
+#include "testing/gtest/include/gtest/gtest-spi.h"
+#include "net/third_party/quiche/src/quic/platform/api/quic_test.h"
+
+namespace quic {
+namespace test {
+
+class QuicTestUtilsTest : public QuicTest {};
+
+TEST_F(QuicTestUtilsTest, ConnectionId) {
+  EXPECT_NE(EmptyQuicConnectionId(), TestConnectionId());
+  EXPECT_NE(EmptyQuicConnectionId(), TestConnectionId(1));
+  EXPECT_EQ(TestConnectionId(), TestConnectionId());
+  EXPECT_EQ(TestConnectionId(33), TestConnectionId(33));
+  EXPECT_NE(TestConnectionId(0xdead), TestConnectionId(0xbeef));
+  EXPECT_EQ(0x1337u, TestConnectionIdToUInt64(TestConnectionId(0x1337)));
+  EXPECT_NE(0xdeadu, TestConnectionIdToUInt64(TestConnectionId(0xbeef)));
+}
+
+TEST_F(QuicTestUtilsTest, BasicApproxEq) {
+  ExpectApproxEq(10, 10, 1e-6f);
+  ExpectApproxEq(1000, 1001, 0.01f);
+  EXPECT_NONFATAL_FAILURE(ExpectApproxEq(1000, 1100, 0.01f), "");
+
+  ExpectApproxEq(64, 31, 0.55f);
+  EXPECT_NONFATAL_FAILURE(ExpectApproxEq(31, 64, 0.55f), "");
+}
+
+TEST_F(QuicTestUtilsTest, QuicTimeDelta) {
+  ExpectApproxEq(QuicTime::Delta::FromMicroseconds(1000),
+                 QuicTime::Delta::FromMicroseconds(1003), 0.01f);
+  EXPECT_NONFATAL_FAILURE(
+      ExpectApproxEq(QuicTime::Delta::FromMicroseconds(1000),
+                     QuicTime::Delta::FromMicroseconds(1200), 0.01f),
+      "");
+}
+
+TEST_F(QuicTestUtilsTest, QuicBandwidth) {
+  ExpectApproxEq(QuicBandwidth::FromBytesPerSecond(1000),
+                 QuicBandwidth::FromBitsPerSecond(8005), 0.01f);
+  EXPECT_NONFATAL_FAILURE(
+      ExpectApproxEq(QuicBandwidth::FromBytesPerSecond(1000),
+                     QuicBandwidth::FromBitsPerSecond(9005), 0.01f),
+      "");
+}
+
+// Ensure that SimpleRandom does not change its output for a fixed seed.
+TEST_F(QuicTestUtilsTest, SimpleRandomStability) {
+  SimpleRandom rng;
+  rng.set_seed(UINT64_C(0x1234567800010001));
+  EXPECT_EQ(UINT64_C(14865409841904857791), rng.RandUint64());
+  EXPECT_EQ(UINT64_C(12139094019410129741), rng.RandUint64());
+}
+
+}  // namespace test
+}  // namespace quic