diff --git a/test/concurrency.spec.js b/test/concurrency.spec.js
index 75f5fd5..cabd37c 100644
--- a/test/concurrency.spec.js
+++ b/test/concurrency.spec.js
@@ -2,81 +2,81 @@ const branchy = require('../lib/branchy')
 
 const sleep = ms => new Promise(resolve => setTimeout(resolve, ms))
 
-test('handles process numbers below threshold concurrently', () => {
+test('handles process numbers below threshold concurrently', async () => {
   const results = []
   const sleeper = branchy(sleep, { concurrent: 2 })
 
-  return Promise.all([
-    sleeper(300).then(() => results.push(1)),
-    sleeper(0).then(() => results.push(2))
-  ]).then(() => {
-    expect(results).toEqual([2, 1])
-  })
+  const call1 = sleeper(300).then(() => results.push(1))
+  const call2 = sleeper(0).then(() => results.push(2))
+
+  await Promise.all([call1, call2])
+
+  expect(results).toEqual([2, 1])
 })
 
-test('respects call priority', () => {
+test('respects call priority', async () => {
   const results = []
   const sleeper = branchy(sleep, {
     concurrent: { threads: 1, priority: num => num }
   })
 
-  return Promise.all([
-    sleeper(300).then(() => results.push(1)),
-    sleeper(0).then(() => results.push(2))
-  ]).then(() => {
-    expect(results).toEqual([1, 2])
-  })
+  const call1 = sleeper(300).then(() => results.push(1))
+  const call2 = sleeper(0).then(() => results.push(2))
+
+  await Promise.all([call1, call2])
+
+  expect(results).toEqual([1, 2])
 })
 
-test('handles process numbers above threshold sequentially', () => {
+test('handles process numbers above threshold sequentially', async () => {
   const results = []
   const sleeper = branchy(sleep, { concurrent: 1 })
 
-  return Promise.all([
-    sleeper(300).then(() => results.push(1)),
-    sleeper(0).then(() => results.push(2))
-  ]).then(() => {
-    expect(results).toEqual([1, 2])
-  })
+  const call1 = sleeper(300).then(() => results.push(1))
+  const call2 = sleeper(0).then(() => results.push(2))
+
+  await Promise.all([call1, call2])
+
+  expect(results).toEqual([1, 2])
 })
 
-test('handles concurrency threshold independently', () => {
+test('handles concurrency threshold independently', async () => {
   const results = []
   const sleeper1 = branchy(sleep, { concurrent: 1 })
   const sleeper2 = branchy(sleep, { concurrent: 1 })
 
-  return Promise.all([
-    sleeper1(300).then(() => results.push(1)),
-    sleeper2(0).then(() => results.push(2))
-  ]).then(() => {
-    expect(results).toEqual([2, 1])
-  })
+  const call1 = sleeper1(300).then(() => results.push(1))
+  const call2 = sleeper2(0).then(() => results.push(2))
+
+  await Promise.all([call1, call2])
+
+  expect(results).toEqual([2, 1])
 })
 
-test('handles stacks correctly', () => {
+test('handles stacks correctly', async () => {
   const results = []
   const sleeper = branchy(sleep, {
     concurrent: { threads: 1, strategy: 'stack' }
   })
 
-  return Promise.all([
-    sleeper(0).then(() => results.push(1)),
-    sleeper(300).then(() => results.push(2))
-  ]).then(() => {
-    expect(results).toEqual([2, 1])
-  })
+  const call1 = sleeper(0).then(() => results.push(1))
+  const call2 = sleeper(300).then(() => results.push(2))
+
+  await Promise.all([call1, call2])
+
+  expect(results).toEqual([2, 1])
 })
 
-test('handles shared context correctly', () => {
+test('handles shared context correctly', async () => {
   const results = []
   const context = branchy.createContext({ concurrent: 1 })
   const sleeper1 = branchy(sleep, { concurrent: context })
   const sleeper2 = branchy(sleep, { concurrent: context })
 
-  return Promise.all([
-    sleeper1(300).then(() => results.push(1)),
-    sleeper2(0).then(() => results.push(2))
-  ]).then(() => {
-    expect(results).toEqual([1, 2])
-  })
+  const call1 = sleeper1(300).then(() => results.push(1))
+  const call2 = sleeper2(0).then(() => results.push(2))
+
+  await Promise.all([call1, call2])
+
+  expect(results).toEqual([1, 2])
 })