diff --git a/packages/launchpad/src/signingcosmosclient.spec.ts b/packages/launchpad/src/signingcosmosclient.spec.ts
index 22537d77..f9214389 100644
--- a/packages/launchpad/src/signingcosmosclient.spec.ts
+++ b/packages/launchpad/src/signingcosmosclient.spec.ts
@@ -6,7 +6,7 @@ import { assertIsBroadcastTxSuccess, PrivateCosmosClient } from "./cosmosclient"
 import { GasPrice } from "./gas";
 import { MsgDelegate } from "./msgs";
 import { Secp256k1Wallet } from "./secp256k1wallet";
-import { SigningCosmosClient } from "./signingcosmosclient";
+import { PrivateSigningCosmosClient, SigningCosmosClient } from "./signingcosmosclient";
 import { makeRandomAddress, pendingWithoutWasmd, validatorAddress } from "./testutils.spec";
 
 const httpUrl = "http://localhost:1317";
@@ -33,7 +33,8 @@ describe("SigningCosmosClient", () => {
       const wallet = await Secp256k1Wallet.fromMnemonic(faucet.mnemonic);
       const gasPrice = new GasPrice(3.14, "utest");
       const client = new SigningCosmosClient(httpUrl, faucet.address, wallet, gasPrice);
-      expect((client as any).fees).toEqual({
+      const openedClient = (client as unknown) as PrivateSigningCosmosClient;
+      expect(openedClient.fees).toEqual({
         send: {
           amount: [
             {
@@ -52,7 +53,8 @@ describe("SigningCosmosClient", () => {
         send: 160000,
       };
       const client = new SigningCosmosClient(httpUrl, faucet.address, wallet, undefined, gasLimits);
-      expect((client as any).fees).toEqual({
+      const openedClient = (client as unknown) as PrivateSigningCosmosClient;
+      expect(openedClient.fees).toEqual({
         send: {
           amount: [
             {
@@ -72,7 +74,8 @@ describe("SigningCosmosClient", () => {
         send: 160000,
       };
       const client = new SigningCosmosClient(httpUrl, faucet.address, wallet, gasPrice, gasLimits);
-      expect((client as any).fees).toEqual({
+      const openedClient = (client as unknown) as PrivateSigningCosmosClient;
+      expect(openedClient.fees).toEqual({
         send: {
           amount: [
             {
diff --git a/packages/launchpad/src/signingcosmosclient.ts b/packages/launchpad/src/signingcosmosclient.ts
index cbb8dcdb..1889fb15 100644
--- a/packages/launchpad/src/signingcosmosclient.ts
+++ b/packages/launchpad/src/signingcosmosclient.ts
@@ -11,6 +11,11 @@ import { OfflineSigner } from "./wallet";
 const defaultGasPrice = new GasPrice(0.025, "ucosm");
 const defaultGasLimits: GasLimits = { send: 80000 };
 
+/** Use for testing only */
+export interface PrivateSigningCosmosClient {
+  readonly fees: FeeTable;
+}
+
 export class SigningCosmosClient extends CosmosClient {
   public readonly senderAddress: string;