diff --git a/Tethering/common/TetheringLib/src/android/net/TetheringManager.java b/Tethering/common/TetheringLib/src/android/net/TetheringManager.java
index b3f0cf2..cd914d3 100644
--- a/Tethering/common/TetheringLib/src/android/net/TetheringManager.java
+++ b/Tethering/common/TetheringLib/src/android/net/TetheringManager.java
@@ -1273,8 +1273,10 @@
 
         @Override
         public int hashCode() {
-            return Objects.hash(mTetherableBluetoothRegexs, mTetherableUsbRegexs,
-                    mTetherableWifiRegexs);
+            return Objects.hash(
+                    Arrays.hashCode(mTetherableBluetoothRegexs),
+                    Arrays.hashCode(mTetherableUsbRegexs),
+                    Arrays.hashCode(mTetherableWifiRegexs));
         }
 
         @Override
diff --git a/service/mdns/com/android/server/connectivity/mdns/MdnsServiceRecord.java b/service/mdns/com/android/server/connectivity/mdns/MdnsServiceRecord.java
index 51de3b2..7a2acd9 100644
--- a/service/mdns/com/android/server/connectivity/mdns/MdnsServiceRecord.java
+++ b/service/mdns/com/android/server/connectivity/mdns/MdnsServiceRecord.java
@@ -143,7 +143,7 @@
         return super.equals(other)
                 && (servicePriority == otherRecord.servicePriority)
                 && (serviceWeight == otherRecord.serviceWeight)
-                && Objects.equals(serviceHost, otherRecord.serviceHost)
+                && Arrays.equals(serviceHost, otherRecord.serviceHost)
                 && (servicePort == otherRecord.servicePort);
     }
-}
\ No newline at end of file
+}
diff --git a/tests/cts/net/src/android/net/cts/TunUtils.java b/tests/cts/net/src/android/net/cts/TunUtils.java
index d8e39b4..0377160 100644
--- a/tests/cts/net/src/android/net/cts/TunUtils.java
+++ b/tests/cts/net/src/android/net/cts/TunUtils.java
@@ -27,12 +27,13 @@
 
 import android.os.ParcelFileDescriptor;
 
+import com.android.net.module.util.CollectionUtils;
+
 import java.io.FileInputStream;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.Collections;
 import java.util.List;
 import java.util.function.Predicate;
 
@@ -170,7 +171,7 @@
      */
     private static boolean isEspFailIfSpecifiedPlaintextFound(
             byte[] pkt, int spi, boolean encap, byte[] plaintext) {
-        if (Collections.indexOfSubList(Arrays.asList(pkt), Arrays.asList(plaintext)) != -1) {
+        if (CollectionUtils.indexOfSubArray(pkt, plaintext) != -1) {
             fail("Banned plaintext packet found");
         }