diff --git a/gerrit-server/src/main/java/com/google/gerrit/server/group/ListIncludedGroups.java b/gerrit-server/src/main/java/com/google/gerrit/server/group/ListIncludedGroups.java
index 3536186fd5..31332d3827 100644
--- a/gerrit-server/src/main/java/com/google/gerrit/server/group/ListIncludedGroups.java
+++ b/gerrit-server/src/main/java/com/google/gerrit/server/group/ListIncludedGroups.java
@@ -18,6 +18,7 @@ import static com.google.common.base.Strings.nullToEmpty;
 
 import com.google.common.collect.Lists;
 import com.google.gerrit.common.errors.NoSuchGroupException;
+import com.google.gerrit.extensions.restapi.MethodNotAllowedException;
 import com.google.gerrit.extensions.restapi.ResourceNotFoundException;
 import com.google.gerrit.extensions.restapi.RestReadView;
 import com.google.gerrit.reviewdb.client.AccountGroupIncludeByUuid;
@@ -51,9 +52,9 @@ public class ListIncludedGroups implements RestReadView<GroupResource> {
 
   @Override
   public List<GroupInfo> apply(GroupResource rsrc)
-      throws ResourceNotFoundException, OrmException {
+      throws MethodNotAllowedException, ResourceNotFoundException, OrmException {
     if (rsrc.toAccountGroup() == null) {
-      throw new ResourceNotFoundException(rsrc.getGroupUUID().get());
+      throw new MethodNotAllowedException();
     }
 
     boolean ownerOfParent = rsrc.getControl().isOwner();
diff --git a/gerrit-server/src/main/java/com/google/gerrit/server/group/ListMembers.java b/gerrit-server/src/main/java/com/google/gerrit/server/group/ListMembers.java
index f586d55754..a9aae17794 100644
--- a/gerrit-server/src/main/java/com/google/gerrit/server/group/ListMembers.java
+++ b/gerrit-server/src/main/java/com/google/gerrit/server/group/ListMembers.java
@@ -20,6 +20,7 @@ import com.google.common.collect.Maps;
 import com.google.common.collect.Ordering;
 import com.google.gerrit.common.data.GroupDetail;
 import com.google.gerrit.common.errors.NoSuchGroupException;
+import com.google.gerrit.extensions.restapi.MethodNotAllowedException;
 import com.google.gerrit.extensions.restapi.ResourceNotFoundException;
 import com.google.gerrit.extensions.restapi.RestReadView;
 import com.google.gerrit.reviewdb.client.Account;
@@ -59,9 +60,9 @@ public class ListMembers implements RestReadView<GroupResource> {
 
   @Override
   public List<AccountInfo> apply(final GroupResource resource)
-      throws ResourceNotFoundException, OrmException {
+      throws MethodNotAllowedException, ResourceNotFoundException, OrmException {
     if (resource.toAccountGroup() == null) {
-      throw new ResourceNotFoundException(resource.getGroupUUID().get());
+      throw new MethodNotAllowedException();
     }
     try {
       final Map<Account.Id, AccountInfo> members =