diff --git a/types/graphql-api-koa/graphql-api-koa-tests.ts b/types/graphql-api-koa/graphql-api-koa-tests.ts
deleted file mode 100644
index e69de29bb2..0000000000
diff --git a/types/graphql-api-koa/index.d.ts b/types/graphql-api-koa/index.d.ts
index 4d74a574a5..b1cbae8ecd 100644
--- a/types/graphql-api-koa/index.d.ts
+++ b/types/graphql-api-koa/index.d.ts
@@ -7,20 +7,20 @@
 import { GraphQLSchema } from "graphql";
 import { Middleware, ParameterizedContext } from "koa";
 
-interface ExecuteOptions {
+export interface ExecuteOptions {
   schema?: GraphQLSchema;
   rootValue?: any;
   contextValue?: any;
   fieldResolver?: any;
 }
 
-export const errorHandler: <StateT = any, CustomT = {}>() => Middleware<
+export function errorHandler<StateT = any, CustomT = {}>(): Middleware<
   StateT,
   CustomT
 >;
 
-export const execute: <StateT = any, CustomT = {}>(
+export function execute<StateT = any, CustomT = {}>(
   options: ExecuteOptions & {
     override?: (ctx: ParameterizedContext<StateT, CustomT>) => ExecuteOptions;
   }
-) => Middleware<StateT, CustomT>;
+): Middleware<StateT, CustomT>;