diff --git a/Cronet/tests/cts/src/android/net/http/cts/QuicOptionsTest.kt b/Cronet/tests/cts/src/android/net/http/cts/QuicOptionsTest.kt
index a05aecd..5f1979f 100644
--- a/Cronet/tests/cts/src/android/net/http/cts/QuicOptionsTest.kt
+++ b/Cronet/tests/cts/src/android/net/http/cts/QuicOptionsTest.kt
@@ -19,6 +19,9 @@
 import androidx.test.ext.junit.runners.AndroidJUnit4
 import com.google.common.truth.Truth.assertThat
 import java.time.Duration
+import kotlin.test.assertFailsWith
+import kotlin.test.assertFalse
+import kotlin.test.assertTrue
 import org.junit.Test
 import org.junit.runner.RunWith
 
@@ -30,7 +33,10 @@
         assertThat(quicOptions.allowedQuicHosts).isEmpty()
         assertThat(quicOptions.handshakeUserAgent).isNull()
         assertThat(quicOptions.idleConnectionTimeout).isNull()
-        assertThat(quicOptions.inMemoryServerConfigsCacheSize).isNull()
+        assertFalse(quicOptions.hasInMemoryServerConfigsCacheSize())
+        assertFailsWith(IllegalStateException::class) {
+            quicOptions.inMemoryServerConfigsCacheSize
+        }
     }
 
     @Test
@@ -61,6 +67,7 @@
         val quicOptions = QuicOptions.Builder()
                 .setInMemoryServerConfigsCacheSize(42)
                 .build()
+        assertTrue(quicOptions.hasInMemoryServerConfigsCacheSize())
         assertThat(quicOptions.inMemoryServerConfigsCacheSize)
                 .isEqualTo(42)
     }
diff --git a/Tethering/common/TetheringLib/cronet_enabled/api/current.txt b/Tethering/common/TetheringLib/cronet_enabled/api/current.txt
index 66a0295..bc76b72 100644
--- a/Tethering/common/TetheringLib/cronet_enabled/api/current.txt
+++ b/Tethering/common/TetheringLib/cronet_enabled/api/current.txt
@@ -177,7 +177,8 @@
     method @NonNull public java.util.Set<java.lang.String> getAllowedQuicHosts();
     method @Nullable public String getHandshakeUserAgent();
     method @Nullable public java.time.Duration getIdleConnectionTimeout();
-    method @Nullable public Integer getInMemoryServerConfigsCacheSize();
+    method public int getInMemoryServerConfigsCacheSize();
+    method public boolean hasInMemoryServerConfigsCacheSize();
   }
 
   public static final class QuicOptions.Builder {