diff --git a/tests/cts/net/Android.mk b/tests/cts/net/Android.mk
index 82abd62..46d4d81 100644
--- a/tests/cts/net/Android.mk
+++ b/tests/cts/net/Android.mk
@@ -21,7 +21,10 @@
 # and when built explicitly put it in the data partition
 LOCAL_MODULE_PATH := $(TARGET_OUT_DATA_APPS)
 
-LOCAL_JAVA_LIBRARIES := android.test.runner voip-common
+# Include both the 32 and 64 bit versions
+LOCAL_MULTILIB := both
+
+LOCAL_JAVA_LIBRARIES := voip-common conscrypt
 
 LOCAL_JNI_SHARED_LIBRARIES := libnativedns_jni
 
@@ -33,7 +36,7 @@
 LOCAL_STATIC_JAVA_LIBRARIES := ctstestserver ctsdeviceutil ctstestrunner \
                                core-tests-support
 
-# uncomment when dalvik.annotation.Test* are removed or part of SDK
+# uncomment when b/13249961 is fixed
 #LOCAL_SDK_VERSION := current
 
 include $(BUILD_CTS_PACKAGE)
diff --git a/tests/cts/net/AndroidManifest.xml b/tests/cts/net/AndroidManifest.xml
index ade6728..652262d 100644
--- a/tests/cts/net/AndroidManifest.xml
+++ b/tests/cts/net/AndroidManifest.xml
@@ -32,9 +32,12 @@
         <uses-library android:name="android.test.runner" />
     </application>
 
-    <instrumentation android:name="android.test.InstrumentationCtsTestRunner"
+    <instrumentation android:name="android.support.test.runner.AndroidJUnitRunner"
                      android:targetPackage="com.android.cts.net"
-                     android:label="CTS tests of android.net"/>
+                     android:label="CTS tests of android.net">
+        <meta-data android:name="listener"
+            android:value="com.android.cts.runner.CtsTestRunListener" />
+    </instrumentation>
 
 </manifest>
 
diff --git a/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java b/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java
index 5656119..d79ecdd 100644
--- a/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java
+++ b/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java
@@ -16,7 +16,6 @@
 
 package android.net.cts;
 
-
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
@@ -31,6 +30,8 @@
 import android.test.AndroidTestCase;
 import android.util.Log;
 
+import com.android.internal.telephony.PhoneConstants;
+
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.HashSet;
@@ -115,34 +116,9 @@
     }
 
     public void testSetNetworkPreference() {
-        // verify swtiching between two default networks - need to connectable networks though
-        // could use test and whatever the current active network is
-        int originalPref = mCm.getNetworkPreference();
-        int currentPref = originalPref;
-        for (int type = -1; type <= ConnectivityManager.MAX_NETWORK_TYPE+1; type++) {
-            mCm.setNetworkPreference(type);
-            NetworkConfig c = mNetworks.get(type);
-            boolean expectWorked = (c != null && c.isDefault());
-            int totalSleep = 0;
-            int foundType = ConnectivityManager.TYPE_NONE;
-            while (totalSleep < 1000) {
-                try {
-                    Thread.currentThread().sleep(100);
-                } catch (InterruptedException e) {}
-                totalSleep += 100;
-                foundType = mCm.getNetworkPreference();
-                if (currentPref != foundType) break;
-            }
-            if (expectWorked) {
-                assertTrue("We should have been able to switch prefered type " + type,
-                        foundType == type);
-            } else {
-                assertTrue("We should not have been able to switch type " + type,
-                        foundType != type);
-            }
-            currentPref = foundType;
-        }
-        mCm.setNetworkPreference(originalPref);
+        // getNetworkPreference() and setNetworkPreference() are both deprecated so they do
+        // not preform any action.  Verify they are at least still callable.
+        mCm.setNetworkPreference(mCm.getNetworkPreference());
     }
 
     public void testGetActiveNetworkInfo() {
@@ -194,13 +170,13 @@
         final String invalidateFeature = "invalidateFeature";
         final String mmsFeature = "enableMMS";
         final int failureCode = -1;
-        final int wifiOnlyStartFailureCode = 3;
-        final int wifiOnlyStopFailureCode = 1;
+        final int wifiOnlyStartFailureCode = PhoneConstants.APN_REQUEST_FAILED;
+        final int wifiOnlyStopFailureCode = -1;
 
         NetworkInfo ni = mCm.getNetworkInfo(TYPE_MOBILE);
         if (ni != null) {
-            assertEquals(failureCode, mCm.startUsingNetworkFeature(TYPE_MOBILE,
-                    invalidateFeature));
+            assertEquals(PhoneConstants.APN_REQUEST_FAILED,
+                    mCm.startUsingNetworkFeature(TYPE_MOBILE, invalidateFeature));
             assertEquals(failureCode, mCm.stopUsingNetworkFeature(TYPE_MOBILE,
                     invalidateFeature));
         } else {
@@ -212,8 +188,8 @@
 
         ni = mCm.getNetworkInfo(TYPE_WIFI);
         if (ni != null) {
-            // Should return failure(-1) because MMS is not supported on WIFI.
-            assertEquals(failureCode, mCm.startUsingNetworkFeature(TYPE_WIFI,
+            // Should return failure because MMS is not supported on WIFI.
+            assertEquals(PhoneConstants.APN_REQUEST_FAILED, mCm.startUsingNetworkFeature(TYPE_WIFI,
                     mmsFeature));
             assertEquals(failureCode, mCm.stopUsingNetworkFeature(TYPE_WIFI,
                     mmsFeature));
diff --git a/tests/cts/net/src/android/net/cts/DnsTest.java b/tests/cts/net/src/android/net/cts/DnsTest.java
index 879a962..0377d04 100644
--- a/tests/cts/net/src/android/net/cts/DnsTest.java
+++ b/tests/cts/net/src/android/net/cts/DnsTest.java
@@ -16,6 +16,10 @@
 
 package android.net.cts;
 
+import android.content.Context;
+import android.content.pm.PackageManager;
+import android.net.ConnectivityManager;
+import android.net.NetworkInfo;
 import android.os.SystemClock;
 import android.test.AndroidTestCase;
 import android.util.Log;
@@ -34,6 +38,7 @@
 
     private static final boolean DBG = false;
     private static final String TAG = "DnsTest";
+    private static final String PROXY_NETWORK_TYPE = "PROXY";
 
     /**
      * @return true on success
@@ -71,6 +76,14 @@
         // We should have at least one of the addresses to connect!
         assertTrue(foundV4 || foundV6);
 
+        // Skip the rest of the test if the active network for watch is PROXY.
+        // TODO: Check NetworkInfo type in addition to type name once ag/601257 is merged.
+        if (getContext().getPackageManager().hasSystemFeature(PackageManager.FEATURE_WATCH)
+                && activeNetworkInfoIsProxy()) {
+            Log.i(TAG, "Skipping test because the active network type name is PROXY.");
+            return;
+        }
+
         try {
             addrs = InetAddress.getAllByName("ipv6.google.com");
         } catch (UnknownHostException e) {}
@@ -241,4 +254,15 @@
             Log.e(TAG, "bad URL in testDnsPerf: " + e.toString());
         }
     }
+
+    private boolean activeNetworkInfoIsProxy() {
+        ConnectivityManager cm = (ConnectivityManager)
+                getContext().getSystemService(Context.CONNECTIVITY_SERVICE);
+        NetworkInfo info = cm.getActiveNetworkInfo();
+        if (PROXY_NETWORK_TYPE.equals(info.getTypeName())) {
+            return true;
+        }
+
+        return false;
+    }
 }
diff --git a/tests/cts/net/src/android/net/cts/MultinetworkTest.java b/tests/cts/net/src/android/net/cts/MultinetworkTest.java
new file mode 100644
index 0000000..256c030
--- /dev/null
+++ b/tests/cts/net/src/android/net/cts/MultinetworkTest.java
@@ -0,0 +1,99 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net.cts;
+
+import android.system.ErrnoException;
+import android.system.Os;
+import android.system.OsConstants;
+import android.system.StructStat;
+import android.test.AndroidTestCase;
+
+import java.io.File;
+import java.io.FileDescriptor;
+import java.io.IOException;
+
+/**
+ * Tests for multinetwork functionality.
+ */
+public class MultinetworkTest extends AndroidTestCase {
+
+    // Global sysctls. Must be present and set to 1.
+    private static final String[] GLOBAL_SYSCTLS = {
+        "/proc/sys/net/ipv4/fwmark_reflect",
+        "/proc/sys/net/ipv6/fwmark_reflect",
+        "/proc/sys/net/ipv4/tcp_fwmark_accept",
+    };
+
+    // Per-interface IPv6 autoconf sysctls.
+    private static final String IPV6_SYSCTL_DIR = "/proc/sys/net/ipv6/conf";
+    private static final String AUTOCONF_SYSCTL = "accept_ra_rt_table";
+
+    // Expected mode, UID, and GID of sysctl files.
+    private static final int SYSCTL_MODE = 0100644;
+    private static final int SYSCTL_UID = 0;
+    private static final int SYSCTL_GID = 0;
+
+    private void checkSysctlPermissions(String fileName) throws ErrnoException {
+        StructStat stat = Os.stat(fileName);
+        assertEquals("mode of " + fileName + ":", SYSCTL_MODE, stat.st_mode);
+        assertEquals("UID of " + fileName + ":", SYSCTL_UID, stat.st_uid);
+        assertEquals("GID of " + fileName + ":", SYSCTL_GID, stat.st_gid);
+    }
+
+    private void assertLess(String what, int a, int b) {
+        assertTrue(what + " expected < " + b + " but was: " + a, a < b);
+    }
+
+    private String readFile(String fileName) throws ErrnoException, IOException {
+        byte[] buf = new byte[1024];
+        FileDescriptor fd = Os.open(fileName, 0, OsConstants.O_RDONLY);
+        int bytesRead = Os.read(fd, buf, 0, buf.length);
+        assertLess("length of " + fileName + ":", bytesRead, buf.length);
+        return new String(buf);
+    }
+
+    /**
+     * Checks that the sysctls for multinetwork kernel features are present and
+     * enabled. The necessary kernel commits are:
+     *
+     * Mainline Linux:
+     *   e110861 net: add a sysctl to reflect the fwmark on replies
+     *   1b3c61d net: Use fwmark reflection in PMTU discovery.
+     *   84f39b0 net: support marking accepting TCP sockets
+     *
+     * Common Android tree (e.g., 3.10):
+     *   a03f539 net: ipv6: autoconf routes into per-device tables
+     */
+     public void testProcFiles() throws ErrnoException, IOException, NumberFormatException {
+         for (String sysctl : GLOBAL_SYSCTLS) {
+             checkSysctlPermissions(sysctl);
+             int value = Integer.parseInt(readFile(sysctl).trim());
+             assertEquals("value of " + sysctl + ":", 1, value);
+         }
+
+         File[] interfaceDirs = new File(IPV6_SYSCTL_DIR).listFiles();
+         for (File interfaceDir : interfaceDirs) {
+             if (interfaceDir.getName().equals("all") || interfaceDir.getName().equals("lo")) {
+                 continue;
+             }
+             String sysctl = new File(interfaceDir, AUTOCONF_SYSCTL).getAbsolutePath();
+             checkSysctlPermissions(sysctl);
+             int value = Integer.parseInt(readFile(sysctl).trim());
+             assertLess("value of " + sysctl + ":", value, 0);
+         }
+     }
+}
diff --git a/tests/cts/net/src/android/net/cts/SSLCertificateSocketFactoryTest.java b/tests/cts/net/src/android/net/cts/SSLCertificateSocketFactoryTest.java
index cb8aeaf..6175923 100644
--- a/tests/cts/net/src/android/net/cts/SSLCertificateSocketFactoryTest.java
+++ b/tests/cts/net/src/android/net/cts/SSLCertificateSocketFactoryTest.java
@@ -26,8 +26,6 @@
 import android.net.SSLCertificateSocketFactory;
 import android.test.AndroidTestCase;
 
-import dalvik.annotation.BrokenTest;
-
 import libcore.javax.net.ssl.SSLDefaultConfigurationAsserts;
 
 public class SSLCertificateSocketFactoryTest extends AndroidTestCase {
diff --git a/tests/cts/net/src/android/net/cts/TrafficStatsTest.java b/tests/cts/net/src/android/net/cts/TrafficStatsTest.java
old mode 100644
new mode 100755
index 1618743..74cd771
--- a/tests/cts/net/src/android/net/cts/TrafficStatsTest.java
+++ b/tests/cts/net/src/android/net/cts/TrafficStatsTest.java
@@ -206,6 +206,16 @@
         final int maxExpectedExtraPackets = 7;
         final int minExpectedExtraPackets = 5;
 
+        // Some other tests don't cleanup connections correctly.
+        // They have the same UID, so we discount their lingering traffic
+        // which happens only on non-localhost, such as TCP FIN retranmission packets
+        long deltaTxOtherPackets = (totalTxPacketsAfter - totalTxPacketsBefore) - uidTxDeltaPackets;
+        long deltaRxOtherPackets = (totalRxPacketsAfter - totalRxPacketsBefore) - uidRxDeltaPackets;
+        if (deltaTxOtherPackets > 0 || deltaRxOtherPackets > 0) {
+            Log.i(LOG_TAG, "lingering traffic data: " + deltaTxOtherPackets + "/" + deltaRxOtherPackets);
+            // Make sure that not too many non-localhost packets are accounted for
+            assertTrue("too many non-localhost packets on the sam UID", deltaTxOtherPackets + deltaTxOtherPackets < 20);
+        }
 
         // Some other tests don't cleanup connections correctly.
         // They have the same UID, so we discount their lingering traffic
diff --git a/tests/cts/net/src/android/net/http/cts/X509TrustManagerExtensionsTest.java b/tests/cts/net/src/android/net/http/cts/X509TrustManagerExtensionsTest.java
new file mode 100644
index 0000000..9c0d774
--- /dev/null
+++ b/tests/cts/net/src/android/net/http/cts/X509TrustManagerExtensionsTest.java
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net.http.cts;
+
+import android.net.http.X509TrustManagerExtensions;
+import android.util.Base64;
+
+import java.io.File;
+import java.io.ByteArrayInputStream;
+
+import java.security.KeyStore;
+import java.security.cert.CertificateFactory;
+import java.security.cert.X509Certificate;
+
+import junit.framework.TestCase;
+
+import com.android.org.conscrypt.TrustedCertificateStore;
+import com.android.org.conscrypt.TrustManagerImpl;
+
+public class X509TrustManagerExtensionsTest extends TestCase {
+
+    public void testIsUserAddedCert() throws Exception {
+        final String testCert =
+            "MIICfjCCAeegAwIBAgIJAMefIzKHY5H4MA0GCSqGSIb3DQEBBQUAMFgxCzAJBgNV" +
+            "BAYTAlVTMQswCQYDVQQIDAJDQTEWMBQGA1UEBwwNTW91bnRhaW4gVmlldzEPMA0G" +
+            "A1UECgwGR2V3Z3VsMRMwEQYDVQQDDApnZXdndWwuY29tMB4XDTEzMTEwNTAwNDE0" +
+            "MFoXDTEzMTIwNTAwNDE0MFowWDELMAkGA1UEBhMCVVMxCzAJBgNVBAgMAkNBMRYw" +
+            "FAYDVQQHDA1Nb3VudGFpbiBWaWV3MQ8wDQYDVQQKDAZHZXdndWwxEzARBgNVBAMM" +
+            "Cmdld2d1bC5jb20wgZ8wDQYJKoZIhvcNAQEBBQADgY0AMIGJAoGBAKpc/I0Ss4sm" +
+            "yV2iX5xRMM7+XXAhiWrceGair4MpvDrGIa1kFj2phtx4IqTfDnNU7AhRJYkDYmJQ" +
+            "fUJ8i6F+I08uNiGVO4DtPJbZcBXg9ME9EMaJCslm995ueeNWSw1Ky8zM0tt4p+94" +
+            "BcXJ7PC3N2WgkvtE8xwNbaeUfhGPzJKXAgMBAAGjUDBOMB0GA1UdDgQWBBQQ/iW7" +
+            "JCkSI2sbn4nTBiZ9PSiO8zAfBgNVHSMEGDAWgBQQ/iW7JCkSI2sbn4nTBiZ9PSiO" +
+            "8zAMBgNVHRMEBTADAQH/MA0GCSqGSIb3DQEBBQUAA4GBABQBrUOWTCSIl3vkRR3w" +
+            "3bPzh3BpqDmxH9xe4rZr+MVKKjpGjY1z2m2EEtyNz3tbgVQym5+si00DUHFL0IP1" +
+            "SuRULmPyEpTBVbV+PA5Kc967ZcDgYt4JtdMcCeKbIFaU6r8oEYEL2PTlNZmgbunM" +
+            "pXktkhVvNxZeSa8yM9bPhXkN";
+
+        CertificateFactory cf = CertificateFactory.getInstance("X.509");
+        X509Certificate cert = (X509Certificate)cf.generateCertificate(
+            new ByteArrayInputStream(Base64.decode(testCert, Base64.DEFAULT)));
+
+        // Test without adding cert to keystore.
+        KeyStore keyStore = KeyStore.getInstance(KeyStore.getDefaultType());
+        X509TrustManagerExtensions tmeNegative =
+            new X509TrustManagerExtensions(new TrustManagerImpl(keyStore));
+        assertEquals(false, tmeNegative.isUserAddedCertificate(cert));
+
+        // Test with cert added to keystore.
+        final File DIR_TEMP = new File(System.getProperty("java.io.tmpdir"));
+        final File DIR_TEST = new File(DIR_TEMP, "test");
+        final File system = new File(DIR_TEST, "system-test");
+        final File added = new File(DIR_TEST, "added-test");
+        final File deleted = new File(DIR_TEST, "deleted-test");
+
+        TrustedCertificateStore tcs = new TrustedCertificateStore(system, added, deleted);
+        added.mkdirs();
+        tcs.installCertificate(cert);
+        X509TrustManagerExtensions tmePositive =
+            new X509TrustManagerExtensions(new TrustManagerImpl(keyStore, null, tcs));
+        assertEquals(true, tmePositive.isUserAddedCertificate(cert));
+    }
+}
diff --git a/tests/cts/net/src/android/net/ipv6/cts/PingTest.java b/tests/cts/net/src/android/net/ipv6/cts/PingTest.java
index 41eb03d..49fc59c 100644
--- a/tests/cts/net/src/android/net/ipv6/cts/PingTest.java
+++ b/tests/cts/net/src/android/net/ipv6/cts/PingTest.java
@@ -19,10 +19,10 @@
 import android.test.AndroidTestCase;
 import android.util.Log;
 
-import libcore.io.ErrnoException;
-import libcore.io.Libcore;
-import libcore.io.StructTimeval;
-import static libcore.io.OsConstants.*;
+import android.system.ErrnoException;
+import android.system.Os;
+import android.system.StructTimeval;
+import static android.system.OsConstants.*;
 
 import java.io.FileDescriptor;
 import java.io.IOException;
@@ -34,6 +34,21 @@
 import java.util.Arrays;
 import java.util.Random;
 
+/**
+ * Checks that the device has kernel support for the IPv6 ping socket. This allows ping6 to work
+ * without root privileges. The necessary kernel code is in Linux 3.11 or above, or the
+ * <code>common/android-3.x</code> kernel trees. If you are not running one of these kernels, the
+ * functionality can be obtained by cherry-picking the following patches from David Miller's
+ * <code>net-next</code> tree:
+ * <ul>
+ * <li>6d0bfe2 net: ipv6: Add IPv6 support to the ping socket.
+ * <li>c26d6b4 ping: always initialize ->sin6_scope_id and ->sin6_flowinfo
+ * <li>fbfe80c net: ipv6: fix wrong ping_v6_sendmsg return value
+ * <li>a1bdc45 net: ipv6: add missing lock in ping_v6_sendmsg
+ * <li>cf970c0 ping: prevent NULL pointer dereference on write to msg_name
+ * </ul>
+ * or the equivalent backports to the <code>common/android-3.x</code> trees.
+ */
 public class PingTest extends AndroidTestCase {
     /** Maximum size of the packets we're using to test. */
     private static final int MAX_SIZE = 4096;
@@ -69,8 +84,8 @@
      * Creates an IPv6 ping socket and sets a receive timeout of 100ms.
      */
     private FileDescriptor createPingSocket() throws ErrnoException {
-        FileDescriptor s = Libcore.os.socket(AF_INET6, SOCK_DGRAM, IPPROTO_ICMPV6);
-        Libcore.os.setsockoptTimeval(s, SOL_SOCKET, SO_RCVTIMEO, StructTimeval.fromMillis(100));
+        FileDescriptor s = Os.socket(AF_INET6, SOCK_DGRAM, IPPROTO_ICMPV6);
+        Os.setsockoptTimeval(s, SOL_SOCKET, SO_RCVTIMEO, StructTimeval.fromMillis(100));
         return s;
     }
 
@@ -83,26 +98,32 @@
         int port = (int) (Math.random() * 2048);
 
         // Send the packet.
-        int ret = Libcore.os.sendto(s, ByteBuffer.wrap(packet), 0, address, port);
+        int ret = Os.sendto(s, ByteBuffer.wrap(packet), 0, address, port);
         assertEquals(packet.length, ret);
     }
 
     /**
      * Checks that a socket has received a response appropriate to the specified packet.
      */
-    private void checkResponse(FileDescriptor s,
-            InetAddress dest, byte[] sent) throws ErrnoException, IOException {
-        // Receive the response.
-        InetSocketAddress from = new InetSocketAddress();
+    private void checkResponse(FileDescriptor s, InetAddress dest,
+            byte[] sent, boolean useRecvfrom) throws ErrnoException, IOException {
         ByteBuffer responseBuffer = ByteBuffer.allocate(MAX_SIZE);
-        int bytesRead = Libcore.os.recvfrom(s, responseBuffer, 0, from);
+        int bytesRead;
 
-        // Check the source address and scope ID.
-        assertTrue(from.getAddress() instanceof Inet6Address);
-        Inet6Address fromAddress = (Inet6Address) from.getAddress();
-        assertEquals(0, fromAddress.getScopeId());
-        assertNull(fromAddress.getScopedInterface());
-        assertEquals(dest.getHostAddress(), fromAddress.getHostAddress());
+        // Receive the response.
+        if (useRecvfrom) {
+            InetSocketAddress from = new InetSocketAddress();
+            bytesRead = Os.recvfrom(s, responseBuffer, 0, from);
+
+            // Check the source address and scope ID.
+            assertTrue(from.getAddress() instanceof Inet6Address);
+            Inet6Address fromAddress = (Inet6Address) from.getAddress();
+            assertEquals(0, fromAddress.getScopeId());
+            assertNull(fromAddress.getScopedInterface());
+            assertEquals(dest.getHostAddress(), fromAddress.getHostAddress());
+        } else {
+            bytesRead = Os.read(s, responseBuffer);
+        }
 
         // Check the packet length.
         assertEquals(sent.length, bytesRead);
@@ -113,7 +134,7 @@
         assertEquals((byte) 0x81, response[0]);
 
         // Find out what ICMP ID was used in the packet that was sent.
-        int id = ((InetSocketAddress) Libcore.os.getsockname(s)).getPort();
+        int id = ((InetSocketAddress) Os.getsockname(s)).getPort();
         sent[4] = (byte) (id / 256);
         sent[5] = (byte) (id % 256);
 
@@ -135,10 +156,13 @@
         for (int i = 0; i < NUM_PACKETS; i++) {
             byte[] packet = pingPacket((int) (Math.random() * MAX_SIZE));
             FileDescriptor s = createPingSocket();
+            // Use both recvfrom and read().
             sendPing(s, ipv6Loopback, packet);
-            checkResponse(s, ipv6Loopback, packet);
+            checkResponse(s, ipv6Loopback, packet, true);
+            sendPing(s, ipv6Loopback, packet);
+            checkResponse(s, ipv6Loopback, packet, false);
             // Check closing the socket doesn't raise an exception.
-            Libcore.os.close(s);
+            Os.close(s);
         }
     }
 }
diff --git a/tests/cts/net/src/android/net/wifi/cts/NsdManagerTest.java b/tests/cts/net/src/android/net/wifi/cts/NsdManagerTest.java
index d1e4c44..d434728 100644
--- a/tests/cts/net/src/android/net/wifi/cts/NsdManagerTest.java
+++ b/tests/cts/net/src/android/net/wifi/cts/NsdManagerTest.java
@@ -356,7 +356,7 @@
         assertTrue(lastEvent.mInfo.getPort() == localPort);
         assertTrue(eventCacheSize() == 1);
 
-        assertTrue(checkForAdditionalEvents());
+        checkForAdditionalEvents();
         clearEventCache();
 
         // Unregister the service
diff --git a/tests/cts/net/src/android/net/wifi/cts/WifiManagerTest.java b/tests/cts/net/src/android/net/wifi/cts/WifiManagerTest.java
index 7faea64..152789c 100644
--- a/tests/cts/net/src/android/net/wifi/cts/WifiManagerTest.java
+++ b/tests/cts/net/src/android/net/wifi/cts/WifiManagerTest.java
@@ -28,6 +28,7 @@
 import android.net.wifi.WifiManager;
 import android.net.wifi.WifiManager.TxPacketCountListener;
 import android.net.wifi.WifiManager.WifiLock;
+import android.os.SystemClock;
 import android.test.AndroidTestCase;
 import android.util.Log;
 
@@ -36,6 +37,7 @@
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
+import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicInteger;
 
 public class WifiManagerTest extends AndroidTestCase {
@@ -46,7 +48,7 @@
     private WifiManager mWifiManager;
     private WifiLock mWifiLock;
     private static MySync mMySync;
-    private List<ScanResult> mScanResult = null;
+    private List<ScanResult> mScanResults = null;
     private NetworkInfo mNetworkInfo;
 
     // Please refer to WifiManager
@@ -66,6 +68,10 @@
     private static final int TIMEOUT_MSEC = 6000;
     private static final int WAIT_MSEC = 60;
     private static final int DURATION = 10000;
+    private static final int WIFI_SCAN_TEST_INTERVAL_MILLIS = 60 * 1000;
+    private static final int WIFI_SCAN_TEST_CACHE_DELAY_MILLIS = 3 * 60 * 1000;
+    private static final int WIFI_SCAN_TEST_ITERATIONS = 5;
+
     private IntentFilter mIntentFilter;
     private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
         @Override
@@ -74,9 +80,9 @@
             if (action.equals(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION)) {
                 synchronized (mMySync) {
                     if (mWifiManager.getScanResults() != null) {
-                        mScanResult = mWifiManager.getScanResults();
+                        mScanResults = mWifiManager.getScanResults();
                         mMySync.expectedState = STATE_SCAN_RESULTS_AVAILABLE;
-                        mScanResult = mWifiManager.getScanResults();
+                        mScanResults = mWifiManager.getScanResults();
                         mMySync.notifyAll();
                     }
                 }
@@ -207,8 +213,9 @@
     private void assertDisableOthers(WifiConfiguration wifiConfiguration, boolean disableOthers) {
         for (WifiConfiguration w : mWifiManager.getConfiguredNetworks()) {
             if ((!w.SSID.equals(wifiConfiguration.SSID)) && w.status != Status.CURRENT) {
-                if (disableOthers)
+                if (disableOthers) {
                     assertEquals(Status.DISABLED, w.status);
+                }
             }
         }
     }
@@ -261,6 +268,46 @@
     }
 
     /**
+     * Test WiFi scan timestamp - fails when WiFi scan timestamps are inconsistent with
+     * {@link SystemClock#elapsedRealtime()} on device.<p>
+     * To run this test in cts-tradefed:
+     * run cts --class android.net.wifi.cts.WifiManagerTest --method testWifiScanTimestamp
+     */
+    public void testWifiScanTimestamp() throws Exception {
+        if (!WifiFeature.isWifiSupported(getContext())) {
+            Log.d(TAG, "Skipping test as WiFi is not supported");
+            return;
+        }
+        if (!mWifiManager.isWifiEnabled()) {
+            setWifiEnabled(true);
+        }
+        // Scan multiple times to make sure scan timestamps increase with device timestamp.
+        for (int i = 0; i < WIFI_SCAN_TEST_ITERATIONS; ++i) {
+            startScan();
+            // Make sure at least one AP is found.
+            assertFalse("empty scan results!", mScanResults.isEmpty());
+            long nowMillis = SystemClock.elapsedRealtime();
+            // Keep track of how many APs are fresh in one scan.
+            int numFreshAps = 0;
+            for (ScanResult result : mScanResults) {
+                long scanTimeMillis = TimeUnit.MICROSECONDS.toMillis(result.timestamp);
+                if (Math.abs(nowMillis - scanTimeMillis)  < WIFI_SCAN_TEST_CACHE_DELAY_MILLIS) {
+                    numFreshAps++;
+                }
+            }
+            // At least half of the APs in the scan should be fresh.
+            int numTotalAps = mScanResults.size();
+            String msg = "Stale AP count: " + (numTotalAps - numFreshAps) + ", fresh AP count: "
+                    + numFreshAps;
+            assertTrue(msg, numFreshAps * 2 >= mScanResults.size());
+            if (i < WIFI_SCAN_TEST_ITERATIONS - 1) {
+                // Wait before running next iteration.
+                Thread.sleep(WIFI_SCAN_TEST_INTERVAL_MILLIS);
+            }
+        }
+    }
+
+    /**
      * test point of wifiManager NetWork:
      * 1.add NetWork
      * 2.update NetWork
@@ -275,6 +322,7 @@
             // skip the test if WiFi is not supported
             return;
         }
+
         // store the list of enabled networks, so they can be re-enabled after test completes
         Set<String> enabledSsids = getEnabledNetworks(mWifiManager.getConfiguredNetworks());
         try {
@@ -307,11 +355,6 @@
             wifiConfiguration = mWifiManager.getConfiguredNetworks().get(pos);
             assertDisableOthers(wifiConfiguration, disableOthers);
             assertEquals(Status.ENABLED, wifiConfiguration.status);
-            disableOthers = true;
-
-            assertTrue(mWifiManager.enableNetwork(netId, disableOthers));
-            wifiConfiguration = mWifiManager.getConfiguredNetworks().get(pos);
-            assertDisableOthers(wifiConfiguration, disableOthers);
 
             assertTrue(mWifiManager.disableNetwork(netId));
             wifiConfiguration = mWifiManager.getConfiguredNetworks().get(pos);