diff --git a/tests/cts/hostside/src/com/android/cts/net/ProcNetTest.java b/tests/cts/hostside/src/com/android/cts/net/ProcNetTest.java
new file mode 100644
index 0000000..1335eb8
--- /dev/null
+++ b/tests/cts/hostside/src/com/android/cts/net/ProcNetTest.java
@@ -0,0 +1,183 @@
+/*
+ * Copyright (C) 2018 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.security.cts;
+
+import com.android.tradefed.build.IBuildInfo;
+import com.android.tradefed.device.ITestDevice;
+import com.android.tradefed.testtype.DeviceTestCase;
+import com.android.tradefed.testtype.IBuildReceiver;
+import com.android.tradefed.testtype.IDeviceTest;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.InputStreamReader;
+import java.lang.Integer;
+import java.lang.String;
+import java.util.stream.Collectors;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.zip.GZIPInputStream;
+
+/**
+ * Host-side tests for values in /proc/net.
+ *
+ * These tests analyze /proc/net to verify that certain networking properties are correct.
+ */
+public class ProcNetTest extends DeviceTestCase implements IBuildReceiver, IDeviceTest {
+    private static final String SPI_TIMEOUT_SYSCTL = "/proc/sys/net/core/xfrm_acq_expires";
+    private static final int MIN_ACQ_EXPIRES = 3600;
+    // 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 values for MIN|MAX_PLEN.
+    private static final String ACCEPT_RA_RT_INFO_MIN_PLEN_STRING = "accept_ra_rt_info_min_plen";
+    private static final int ACCEPT_RA_RT_INFO_MIN_PLEN_VALUE = 48;
+    private static final String ACCEPT_RA_RT_INFO_MAX_PLEN_STRING = "accept_ra_rt_info_max_plen";
+    private static final int ACCEPT_RA_RT_INFO_MAX_PLEN_VALUE = 64;
+    // Expected values for RFC 7559 router soliciations.
+    // Maximum number of router solicitations to send. -1 means no limit.
+    private static final int IPV6_WIFI_ROUTER_SOLICITATIONS = -1;
+    private ITestDevice mDevice;
+    private IBuildInfo mBuild;
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public void setBuild(IBuildInfo build) {
+        mBuild = build;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public void setDevice(ITestDevice device) {
+        super.setDevice(device);
+        mDevice = device;
+    }
+
+    @Override
+    protected void setUp() throws Exception {
+        super.setUp();
+    }
+
+    protected void assertLess(String sysctl, int a, int b) {
+        assertTrue("value of " + sysctl + ": expected < " + b + " but was: " + a, a < b);
+    }
+
+    protected void assertAtLeast(String sysctl, int a, int b) {
+        assertTrue("value of " + sysctl + ": expected >= " + b + " but was: " + a, a >= b);
+    }
+
+    public int readIntFromPath(String path) throws Exception {
+        String mode = mDevice.executeAdbCommand("shell", "stat", "-c", "%a", path).trim();
+        String user = mDevice.executeAdbCommand("shell", "stat", "-c", "%u", path).trim();
+        String group = mDevice.executeAdbCommand("shell", "stat", "-c", "%g", path).trim();
+        assertEquals(mode, "644");
+        assertEquals(user, "0");
+        assertEquals(group, "0");
+        return Integer.parseInt(mDevice.executeAdbCommand("shell", "cat", path).trim());
+    }
+
+    /**
+     * Checks that SPI default timeouts are overridden, and set to a reasonable length of time
+     */
+    public void testMinAcqExpires() throws Exception {
+        int value = readIntFromPath(SPI_TIMEOUT_SYSCTL);
+        assertAtLeast(SPI_TIMEOUT_SYSCTL, value, MIN_ACQ_EXPIRES);
+    }
+
+    /**
+     * 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 testProcSysctls() throws Exception {
+        for (String sysctl : GLOBAL_SYSCTLS) {
+            int value = readIntFromPath(sysctl);
+            assertEquals(sysctl, 1, value);
+        }
+
+        String interfaceDirs[] = mDevice.executeAdbCommand("shell", "ls", "-1",
+                IPV6_SYSCTL_DIR).split("\n");
+        for (String interfaceDir : interfaceDirs) {
+            if (interfaceDir.equals("all") || interfaceDir.equals("lo")) {
+                continue;
+            }
+            String path = IPV6_SYSCTL_DIR + "/" + interfaceDir + "/" + AUTOCONF_SYSCTL;
+            int value = readIntFromPath(path);
+            assertLess(path, value, 0);
+        }
+    }
+
+    /** Verify that accept_ra_rt_info_{min,max}_plen exists and is set to the expected value */
+    public void testAcceptRaRtInfoMinMaxPlen() throws Exception {
+        String interfaceDirs[] = mDevice.executeAdbCommand("shell", "ls", "-1",
+                IPV6_SYSCTL_DIR).split("\n");
+        for (String interfaceDir : interfaceDirs) {
+            if (interfaceDir.equals("all") || interfaceDir.equals("lo")) {
+                continue;
+            }
+            String path = IPV6_SYSCTL_DIR + "/" + interfaceDir + "/" + "accept_ra_rt_info_min_plen";
+            int value = readIntFromPath(path);
+            assertEquals(path, value, ACCEPT_RA_RT_INFO_MIN_PLEN_VALUE);
+            path = IPV6_SYSCTL_DIR + "/" + interfaceDir + "/" + "accept_ra_rt_info_max_plen";
+            value = readIntFromPath(path);
+            assertEquals(path, value, ACCEPT_RA_RT_INFO_MAX_PLEN_VALUE);
+        }
+    }
+
+    /**
+     * Verify that router_solicitations exists and is set to the expected value
+     * and verify that router_solicitation_max_interval exists and is in an acceptable interval.
+     */
+    public void testRouterSolicitations() throws Exception {
+        String interfaceDirs[] = mDevice.executeAdbCommand("shell", "ls", "-1",
+                IPV6_SYSCTL_DIR).split("\n");
+        for (String interfaceDir : interfaceDirs) {
+            if (interfaceDir.equals("all") || interfaceDir.equals("lo")) {
+                continue;
+            }
+            String path = IPV6_SYSCTL_DIR + "/" + interfaceDir + "/" + "router_solicitations";
+            int value = readIntFromPath(path);
+            assertEquals(IPV6_WIFI_ROUTER_SOLICITATIONS, value);
+            path = IPV6_SYSCTL_DIR + "/" + interfaceDir + "/" + "router_solicitation_max_interval";
+            int interval = readIntFromPath(path);
+            final int lowerBoundSec = 15 * 60;
+            final int upperBoundSec = 60 * 60;
+            assertTrue(lowerBoundSec <= interval);
+            assertTrue(interval <= upperBoundSec);
+        }
+    }
+}
diff --git a/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java b/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java
index 441bee3..6e4f34e 100644
--- a/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java
+++ b/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java
@@ -107,17 +107,6 @@
             "Host: " + TEST_HOST + "\r\n" +
             "Connection: keep-alive\r\n\r\n";
 
-    // Base path for IPv6 sysctls
-    private static final String IPV6_SYSCTL_DIR = "/proc/sys/net/ipv6/conf";
-
-    // Expected values for MIN|MAX_PLEN.
-    private static final int IPV6_WIFI_ACCEPT_RA_RT_INFO_MIN_PLEN = 48;
-    private static final int IPV6_WIFI_ACCEPT_RA_RT_INFO_MAX_PLEN = 64;
-
-    // Expected values for RFC 7559 router soliciations.
-    // Maximum number of router solicitations to send. -1 means no limit.
-    private static final int IPV6_WIFI_ROUTER_SOLICITATIONS = -1;
-
     // Action sent to ConnectivityActionReceiver when a network callback is sent via PendingIntent.
     private static final String NETWORK_CALLBACK_ACTION =
             "ConnectivityManagerTest.NetworkCallbackAction";
@@ -908,60 +897,6 @@
         } catch (SecurityException expected) {}
     }
 
-    private Scanner makeWifiSysctlScanner(String key) throws FileNotFoundException {
-        Network network = ensureWifiConnected();
-        String iface = mCm.getLinkProperties(network).getInterfaceName();
-        String path = IPV6_SYSCTL_DIR + "/" + iface + "/" + key;
-        return new Scanner(new File(path));
-    }
-
-    /** Verify that accept_ra_rt_info_min_plen exists and is set to the expected value */
-    public void testAcceptRaRtInfoMinPlen() throws Exception {
-        if (!mPackageManager.hasSystemFeature(PackageManager.FEATURE_WIFI)) {
-            Log.i(TAG, "testConnectivityChanged_manifestRequestOnlyPreN_shouldReceiveIntent cannot execute unless device supports WiFi");
-            return;
-        }
-        Scanner s = makeWifiSysctlScanner("accept_ra_rt_info_min_plen");
-        assertEquals(IPV6_WIFI_ACCEPT_RA_RT_INFO_MIN_PLEN, s.nextInt());
-    }
-
-    /** Verify that accept_ra_rt_info_max_plen exists and is set to the expected value */
-    public void testAcceptRaRtInfoMaxPlen() throws Exception {
-        if (!mPackageManager.hasSystemFeature(PackageManager.FEATURE_WIFI)) {
-            Log.i(TAG, "testConnectivityChanged_manifestRequestOnlyPreN_shouldReceiveIntent cannot execute unless device supports WiFi");
-            return;
-        }
-        Scanner s = makeWifiSysctlScanner("accept_ra_rt_info_max_plen");
-        assertEquals(IPV6_WIFI_ACCEPT_RA_RT_INFO_MAX_PLEN, s.nextInt());
-    }
-
-    /** Verify that router_solicitations exists and is set to the expected value */
-    public void testRouterSolicitations() throws Exception {
-        if (!mPackageManager.hasSystemFeature(PackageManager.FEATURE_WIFI)) {
-            Log.i(TAG, "testConnectivityChanged_manifestRequestOnlyPreN_shouldReceiveIntent cannot execute unless device supports WiFi");
-            return;
-        }
-        Scanner s = makeWifiSysctlScanner("router_solicitations");
-        assertEquals(IPV6_WIFI_ROUTER_SOLICITATIONS, s.nextInt());
-    }
-
-    /** Verify that router_solicitation_max_interval exists and is in an acceptable interval */
-    public void testRouterSolicitationMaxInterval() throws Exception {
-        if (!mPackageManager.hasSystemFeature(PackageManager.FEATURE_WIFI)) {
-            Log.i(TAG, "testConnectivityChanged_manifestRequestOnlyPreN_shouldReceiveIntent cannot execute unless device supports WiFi");
-            return;
-        }
-        Scanner s = makeWifiSysctlScanner("router_solicitation_max_interval");
-        int interval = s.nextInt();
-        // Verify we're in the interval [15 minutes, 60 minutes]. Lower values may adversely
-        // impact battery life and higher values can decrease the probability of detecting
-        // network changes.
-        final int lowerBoundSec = 15 * 60;
-        final int upperBoundSec = 60 * 60;
-        assertTrue(lowerBoundSec <= interval);
-        assertTrue(interval <= upperBoundSec);
-    }
-
     // Returns "true", "false" or "none"
     private String getWifiMeteredStatus(String ssid) throws Exception {
         // Interestingly giving the SSID as an argument to list wifi-networks
diff --git a/tests/cts/net/src/android/net/cts/IpSecSysctlTest.java b/tests/cts/net/src/android/net/cts/IpSecSysctlTest.java
deleted file mode 100644
index b362282..0000000
--- a/tests/cts/net/src/android/net/cts/IpSecSysctlTest.java
+++ /dev/null
@@ -1,45 +0,0 @@
-/*
- * Copyright (C) 2018 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 sysctl functionality.
- */
-public class IpSecSysctlTest extends SysctlBaseTest {
-
-    // SPI expiration sysctls. Must be present and set greater than 1h.
-    private static final String SPI_TIMEOUT_SYSCTL = "/proc/sys/net/core/xfrm_acq_expires";
-    private static final int MIN_ACQ_EXPIRES = 3600;
-
-    /**
-     * Checks that SPI default timeouts are overridden, and set to a reasonable length of time
-     */
-    public void testProcFiles() throws ErrnoException, IOException, NumberFormatException {
-        int value = getIntValue(SPI_TIMEOUT_SYSCTL);
-        assertAtLeast(SPI_TIMEOUT_SYSCTL, value, MIN_ACQ_EXPIRES);
-    }
-}
diff --git a/tests/cts/net/src/android/net/cts/MultinetworkSysctlTest.java b/tests/cts/net/src/android/net/cts/MultinetworkSysctlTest.java
deleted file mode 100644
index 1d0c111..0000000
--- a/tests/cts/net/src/android/net/cts/MultinetworkSysctlTest.java
+++ /dev/null
@@ -1,73 +0,0 @@
-/*
- * 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 sysctl functionality.
- */
-public class MultinetworkSysctlTest extends SysctlBaseTest {
-
-    // 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";
-
-    /**
-     * 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) {
-             int value = getIntValue(sysctl);
-             assertEquals(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();
-             int value = getIntValue(sysctl);
-             assertLess(sysctl, value, 0);
-         }
-     }
-}
diff --git a/tests/cts/net/src/android/net/cts/SysctlBaseTest.java b/tests/cts/net/src/android/net/cts/SysctlBaseTest.java
deleted file mode 100644
index a5966d4..0000000
--- a/tests/cts/net/src/android/net/cts/SysctlBaseTest.java
+++ /dev/null
@@ -1,70 +0,0 @@
-/*
- * Copyright (C) 2018 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 sysctl functionality.
- */
-public class SysctlBaseTest extends AndroidTestCase {
-
-    // 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);
-    }
-
-    protected void assertLess(String sysctl, int a, int b) {
-        assertTrue("value of " + sysctl + ": expected < " + b + " but was: " + a, a < b);
-    }
-
-    protected void assertAtLeast(String sysctl, int a, int b) {
-        assertTrue("value of " + sysctl + ": 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 permissions and retrieves the sysctl's value. Retrieval of value should always use
-     * this method
-     */
-    protected int getIntValue(String filename) throws ErrnoException, IOException {
-        checkSysctlPermissions(filename);
-        return Integer.parseInt(readFile(filename).trim());
-    }
-}