1 files changed, 1 insertions, 1 deletions
diff --git a/packages/subproviders/test/chai_setup.ts b/packages/subproviders/test/chai_setup.ts
index a281bab6c..6c24dc222 100644
--- a/packages/subproviders/test/chai_setup.ts
+++ b/packages/subproviders/test/chai_setup.ts
@@ -3,7 +3,7 @@ import chaiAsPromised = require('chai-as-promised');
 import * as dirtyChai from 'dirty-chai';
 
 export const chaiSetup = {
-    configure() {
+    configure(): void {
         chai.config.includeStack = true;
         chai.use(dirtyChai);
         chai.use(chaiAsPromised);