2 files changed, 4 insertions, 3 deletions
diff --git a/packages/0x.js/test/utils/constants.ts b/packages/0x.js/test/utils/constants.ts
index c7d3aebca..5992c226e 100644
--- a/packages/0x.js/test/utils/constants.ts
+++ b/packages/0x.js/test/utils/constants.ts
@@ -5,4 +5,5 @@ export const constants = {
     TESTRPC_NETWORK_ID: 50,
     KOVAN_RPC_URL: 'https://kovan.infura.io',
     ROPSTEN_RPC_URL: 'https://ropsten.infura.io',
+    ZRX_DECIMALS: 18,
 };
diff --git a/packages/0x.js/test/utils/report_callback_errors.ts b/packages/0x.js/test/utils/report_callback_errors.ts
index d471b2af2..4f9517704 100644
--- a/packages/0x.js/test/utils/report_callback_errors.ts
+++ b/packages/0x.js/test/utils/report_callback_errors.ts
@@ -1,10 +1,10 @@
 import { DoneCallback } from '../../src/types';
 
 export const reportCallbackErrors = (done: DoneCallback) => {
-    return (f: (...args: any[]) => void) => {
-        const wrapped = (...args: any[]) => {
+    return (fAsync: (...args: any[]) => void|Promise<void>) => {
+        const wrapped = async (...args: any[]) => {
             try {
-                f(...args);
+                await fAsync(...args);
             } catch (err) {
                 done(err);
             }