diff --git a/Cronet/tests/cts/src/android/net/http/cts/DnsOptionsTest.kt b/Cronet/tests/cts/src/android/net/http/cts/DnsOptionsTest.kt
index 65cf8fb..b96e931 100644
--- a/Cronet/tests/cts/src/android/net/http/cts/DnsOptionsTest.kt
+++ b/Cronet/tests/cts/src/android/net/http/cts/DnsOptionsTest.kt
@@ -22,6 +22,7 @@
 import kotlin.test.Test
 import kotlin.test.assertEquals
 import kotlin.test.assertNotNull
+import kotlin.test.assertNull
 import kotlin.test.assertTrue
 import org.junit.runner.RunWith
 
@@ -29,6 +30,18 @@
 class DnsOptionsTest {
 
     @Test
+    fun testDnsOptions_defaultValues() {
+        val options = DnsOptions.Builder().build()
+
+        assertNull(options.persistHostCache)
+        assertNull(options.persistHostCachePeriod)
+        assertNull(options.enableStaleDns)
+        assertNull(options.staleDnsOptions)
+        assertNull(options.useHttpStackDnsResolver)
+        assertNull(options.preestablishConnectionsToStaleDnsResults)
+    }
+
+    @Test
     fun testDnsOptions_persistHostCache_returnSetValue() {
         val options = DnsOptions.Builder().setPersistHostCache(true).build()
 
@@ -38,9 +51,78 @@
 
     @Test
     fun testDnsOptions_persistHostCachePeriod_returnSetValue() {
-        val period = Duration.ZERO
+        val period = Duration.ofMillis(12345)
         val options = DnsOptions.Builder().setPersistHostCachePeriod(period).build()
 
         assertEquals(period, options.persistHostCachePeriod)
     }
+
+    @Test
+    fun testDnsOptions_enableStaleDns_returnSetValue() {
+        val options = DnsOptions.Builder().setEnableStaleDns(true).build()
+
+        assertNotNull(options.enableStaleDns)
+        assertTrue(options.enableStaleDns!!)
+    }
+
+    @Test
+    fun testDnsOptions_useHttpStackDnsResolver_returnsSetValue() {
+        val options = DnsOptions.Builder().setUseHttpStackDnsResolver(true).build()
+
+        assertNotNull(options.useHttpStackDnsResolver)
+        assertTrue(options.useHttpStackDnsResolver!!)
+    }
+
+    @Test
+    fun testDnsOptions_preestablishConnectionsToStaleDnsResults_returnsSetValue() {
+        val options = DnsOptions.Builder().setPreestablishConnectionsToStaleDnsResults(true).build()
+
+        assertNotNull(options.preestablishConnectionsToStaleDnsResults)
+        assertTrue(options.preestablishConnectionsToStaleDnsResults!!)
+    }
+
+    @Test
+    fun testStaleDnsOptions_defaultValues() {
+        val options = DnsOptions.StaleDnsOptions.Builder().build()
+
+        assertNull(options.allowCrossNetworkUsage)
+        assertNull(options.freshLookupTimeoutMillis)
+        assertNull(options.maxExpiredDelayMillis)
+        assertNull(options.useStaleOnNameNotResolved)
+    }
+
+    @Test
+    fun testStaleDnsOptions_allowCrossNetworkUsage_returnsSetValue() {
+        val options = DnsOptions.StaleDnsOptions.Builder().setAllowCrossNetworkUsage(true).build()
+
+        assertNotNull(options.allowCrossNetworkUsage)
+        assertTrue(options.allowCrossNetworkUsage!!)
+    }
+
+    @Test
+    fun testStaleDnsOptions_freshLookupTimeout_returnsSetValue() {
+        val duration = Duration.ofMillis(12345)
+        val options = DnsOptions.StaleDnsOptions.Builder().setFreshLookupTimeout(duration).build()
+
+        assertNotNull(options.freshLookupTimeoutMillis)
+        assertEquals(duration.toMillis(), options.freshLookupTimeoutMillis!!)
+    }
+
+    @Test
+    fun testStaleDnsOptions_useStaleOnNameNotResolved_returnsSetValue() {
+        val options =
+                DnsOptions.StaleDnsOptions.Builder().setUseStaleOnNameNotResolved(true).build()
+
+        assertNotNull(options.useStaleOnNameNotResolved)
+        assertTrue(options.useStaleOnNameNotResolved!!)
+    }
+
+    @Test
+    fun testStaleDnsOptions_maxExpiredDelayMillis_returnsSetValue() {
+        val duration = Duration.ofMillis(12345)
+        val options = DnsOptions.StaleDnsOptions.Builder().setMaxExpiredDelay(duration).build()
+
+        assertNotNull(options.maxExpiredDelayMillis)
+        assertEquals(duration.toMillis(), options.maxExpiredDelayMillis!!)
+    }
 }