diff --git a/test/helpers.js b/test/compareVectors.js
similarity index 82%
rename from test/helpers.js
rename to test/compareVectors.js
index cdd5801..f0af31c 100644
--- a/test/helpers.js
+++ b/test/compareVectors.js
@@ -1,4 +1,4 @@
-export function compareVectors(vector1, vector2, numDigits) {
+export default function compareVectors(vector1, vector2, numDigits) {
   if (!numDigits) {
     expect(vector1.x).toEqual(vector2.x);
     expect(vector1.y).toEqual(vector2.y);
diff --git a/test/ext.test.js b/test/ext.test.js
index a973973..c180d29 100644
--- a/test/ext.test.js
+++ b/test/ext.test.js
@@ -1,4 +1,4 @@
-import { compareVectors } from './helpers';
+import compareVectors from './compareVectors';
 
 import {
   jday,
diff --git a/test/propagation/sgp4.test.js b/test/propagation/sgp4.test.js
index fc2bbc8..2628c20 100644
--- a/test/propagation/sgp4.test.js
+++ b/test/propagation/sgp4.test.js
@@ -1,6 +1,6 @@
 import '../ext.test';
 
-import { compareVectors } from '../helpers';
+import compareVectors from '../compareVectors';
 
 import twoline2satrec from '../../src/io';
 import sgp4 from '../../src/propagation/sgp4';