diff --git a/lib/reducers/keyserver-reducer.test.js b/lib/reducers/keyserver-reducer.test.js
--- a/lib/reducers/keyserver-reducer.test.js
+++ b/lib/reducers/keyserver-reducer.test.js
@@ -2,10 +2,7 @@
 
 import reduceKeyserverStore from './keyserver-reducer.js';
 import { deleteKeyserverAccountActionTypes } from '../actions/user-actions.js';
-import {
-  defaultKeyserverInfo,
-  type KeyserverStore,
-} from '../types/keyserver-types.js';
+import { defaultKeyserverInfo } from '../types/keyserver-types.js';
 import { authoritativeKeyserverID } from '../utils/authoritative-keyserver.js';
 
 jest.mock('../utils/config.js');
@@ -47,17 +44,17 @@
   });
   it('update keyserverInfo with authoritativeKeyserverID', () => {
     const defaultAshoatKeyserverInfo = defaultKeyserverInfo('url1');
-    const oldKeyserverStore: KeyserverStore = ({
+    const oldKeyserverStore = {
       keyserverInfos: {
         [authoritativeKeyserverID()]: {
           ...defaultAshoatKeyserverInfo,
           connection: {
             ...defaultAshoatKeyserverInfo.connection,
-            connectionIssue: 'blah',
+            connectionIssue: 'client_version_unsupported',
           },
         },
       },
-    }: any);
+    };
 
     const deleteAccountAction = {
       type: deleteKeyserverAccountActionTypes.success,
@@ -88,17 +85,17 @@
 
   it('return the same keyserverInfo with authoritativeKeyserverID()', () => {
     const defaultAshoatKeyserverInfo = defaultKeyserverInfo('url1');
-    const oldKeyserverStore: KeyserverStore = ({
+    const oldKeyserverStore = {
       keyserverInfos: {
         [authoritativeKeyserverID()]: {
           ...defaultAshoatKeyserverInfo,
           connection: {
             ...defaultAshoatKeyserverInfo.connection,
-            connectionIssue: 'blah',
+            connectionIssue: 'client_version_unsupported',
           },
         },
       },
-    }: any);
+    };
 
     const deleteAccountAction = {
       type: deleteKeyserverAccountActionTypes.success,
@@ -124,6 +121,6 @@
       reduceKeyserverStore(oldKeyserverStore, deleteAccountAction)
         .keyserverStore.keyserverInfos[authoritativeKeyserverID()].connection
         .connectionIssue,
-    ).toEqual('blah');
+    ).toEqual('client_version_unsupported');
   });
 });
diff --git a/lib/types/socket-types.js b/lib/types/socket-types.js
--- a/lib/types/socket-types.js
+++ b/lib/types/socket-types.js
@@ -493,7 +493,7 @@
   | 'forcedDisconnecting'
   | 'disconnected';
 
-export type ConnectionIssue = empty;
+export type ConnectionIssue = 'client_version_unsupported';
 
 export type ConnectionInfo = {
   +status: ConnectionStatus,