diff --git a/framework-t/api/system-current.txt b/framework-t/api/system-current.txt
index c502f72ccb..0149115e16 100644
--- a/framework-t/api/system-current.txt
+++ b/framework-t/api/system-current.txt
@@ -37,7 +37,7 @@ package android.net {
 
   public final class EthernetNetworkUpdateRequest implements android.os.Parcelable {
     method public int describeContents();
-    method @NonNull public android.net.IpConfiguration getIpConfiguration();
+    method @Nullable public android.net.IpConfiguration getIpConfiguration();
     method @Nullable public android.net.NetworkCapabilities getNetworkCapabilities();
     method public void writeToParcel(@NonNull android.os.Parcel, int);
     field @NonNull public static final android.os.Parcelable.Creator<android.net.EthernetNetworkUpdateRequest> CREATOR;
@@ -47,7 +47,7 @@ package android.net {
     ctor public EthernetNetworkUpdateRequest.Builder();
     ctor public EthernetNetworkUpdateRequest.Builder(@NonNull android.net.EthernetNetworkUpdateRequest);
     method @NonNull public android.net.EthernetNetworkUpdateRequest build();
-    method @NonNull public android.net.EthernetNetworkUpdateRequest.Builder setIpConfiguration(@NonNull android.net.IpConfiguration);
+    method @NonNull public android.net.EthernetNetworkUpdateRequest.Builder setIpConfiguration(@Nullable android.net.IpConfiguration);
     method @NonNull public android.net.EthernetNetworkUpdateRequest.Builder setNetworkCapabilities(@Nullable android.net.NetworkCapabilities);
   }
 
diff --git a/tests/unit/java/android/net/EthernetNetworkUpdateRequestTest.java b/tests/unit/java/android/net/EthernetNetworkUpdateRequestTest.java
index 314fbcfca7..ca9558b7f7 100644
--- a/tests/unit/java/android/net/EthernetNetworkUpdateRequestTest.java
+++ b/tests/unit/java/android/net/EthernetNetworkUpdateRequestTest.java
@@ -17,7 +17,9 @@
 package android.net;
 
 import static com.android.testutils.DevSdkIgnoreRuleKt.SC_V2;
-import static com.android.testutils.ParcelUtils.assertParcelSane;
+import static com.android.testutils.ParcelUtils.assertParcelingIsLossless;
+
+import static org.junit.Assert.assertThrows;
 
 import com.android.testutils.DevSdkIgnoreRule;
 import com.android.testutils.DevSdkIgnoreRunner;
@@ -47,8 +49,19 @@ public class EthernetNetworkUpdateRequestTest {
         EthernetNetworkUpdateRequest reqWithNullCaps =
                 new EthernetNetworkUpdateRequest.Builder().setIpConfiguration(
                         buildIpConfiguration()).build();
+        EthernetNetworkUpdateRequest reqWithNullConfig =
+                new EthernetNetworkUpdateRequest.Builder().setNetworkCapabilities(
+                        buildNetworkCapabilities()).build();
 
-        assertParcelSane(reqWithNonNull, 2);
-        assertParcelSane(reqWithNullCaps, 2);
+        assertParcelingIsLossless(reqWithNonNull);
+        assertParcelingIsLossless(reqWithNullCaps);
+        assertParcelingIsLossless(reqWithNullConfig);
+    }
+
+    @Test
+    public void testEmptyUpdateRequestThrows() {
+        EthernetNetworkUpdateRequest.Builder emptyBuilder =
+                new EthernetNetworkUpdateRequest.Builder();
+        assertThrows(IllegalStateException.class, () -> emptyBuilder.build());
     }
 }