diff --git a/src/index.ts b/src/index.ts
index fbe952f..17047ff 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -392,8 +392,8 @@ export class Registry {
   /**
    * List authorities by owner.
    */
-  async getAuthorities (owner?: string) {
-    return this._client.getAuthorities(owner);
+  async getAuthorities (owner?: string, auction = false) {
+    return this._client.getAuthorities(owner, auction);
   }
 
   /**
diff --git a/src/naming.test.ts b/src/naming.test.ts
index 19832e4..58ad295 100644
--- a/src/naming.test.ts
+++ b/src/naming.test.ts
@@ -127,13 +127,15 @@ const namingTests = () => {
       test('List authorities.', async () => {
         const authorities = await registry.getAuthorities();
 
-        expect(authorities.length).toBeDefined();
+        expect(authorities.length).toEqual(4);
       });
 
       test('List authorities by owner.', async () => {
         const authorities = await registry.getAuthorities(otherAccount1.address);
 
+        expect(authorities.length).toEqual(1);
         expect(authorities[0].entry.ownerAddress).toBe(otherAccount1.address);
+        expect(authorities[0].entry.ownerPublicKey).toBe(otherAccount1.encodedPubkey);
       });
     });
   });
diff --git a/src/registry-client.ts b/src/registry-client.ts
index 4658872..23c7776 100644
--- a/src/registry-client.ts
+++ b/src/registry-client.ts
@@ -273,7 +273,7 @@ export class RegistryClient {
   /**
    * List authorities by owner.
    */
-  async getAuthorities (owner?: string) {
+  async getAuthorities (owner?: string, auction = false) {
     const query = `query ($owner: String) {
       getAuthorities(owner: $owner) {
         name
@@ -284,14 +284,7 @@ export class RegistryClient {
           status
           bondId
           expiryTime
-          auction {
-            id
-            status
-            ownerAddress
-            createTime
-            commitsEndTime
-            revealsEndTime
-          }
+          ${auction ? ('auction { ' + auctionFields + ' }') : ''}
         }
       }
     }`;