diff --git a/.eslint-ratchet-high-water-mark b/.eslint-ratchet-high-water-mark
index a4ea6e7a770..65bb5e1ec8c 100644
--- a/.eslint-ratchet-high-water-mark
+++ b/.eslint-ratchet-high-water-mark
@@ -1 +1 @@
-2059
+2051
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5e447203dec..70340119074 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 ## [Unreleased]
 
 ### Fixed
+- **CUMULUS-331:** Fix aws.downloadS3File to handle non-existent key
 - Using test ftp provider for discover-granules testing [CUMULUS-427]
 - **CUMULUS-304: "Add AWS API throttling to pdr-status-check task"** Added concurrency limit on SFN API calls.  The default concurrency is 10 and is configurable through Lambda environment variable CONCURRENCY.
 - **CUMULUS-414: "Schema validation not being performed on many tasks"** revised npm build scripts of tasks that use cumulus-message-adapter to place schema directories into dist directories.
diff --git a/packages/common/aws.js b/packages/common/aws.js
index 08ef45fcd2f..71a955b92d8 100644
--- a/packages/common/aws.js
+++ b/packages/common/aws.js
@@ -10,6 +10,7 @@ const log = require('./log');
 const string = require('./string');
 const { inTestMode, randomString, testAwsClient } = require('./test-utils');
 const promiseRetry = require('promise-retry');
+const pump = require('pump');
 
 const region = exports.region = process.env.AWS_DEFAULT_REGION || 'us-east-1';
 if (region) {
@@ -151,18 +152,22 @@ exports.promiseS3Upload = (params) => {
 
 /**
  * Downloads the given s3Obj to the given filename in a streaming manner
- * @param s3Obj The parameters to send to S3 getObject call
- * @param filename The output filename
+ *
+ * @param {Object} s3Obj - The parameters to send to S3 getObject call
+ * @param {string} filepath - The filepath of the file that is downloaded
+ * @returns {Promise<string>} - returns filename if successful
  */
-exports.downloadS3File = (s3Obj, filename) => {
+exports.downloadS3File = (s3Obj, filepath) => {
   const s3 = exports.s3();
-  const file = fs.createWriteStream(filename);
+  const fileWriteStream = fs.createWriteStream(filepath);
+
   return new Promise((resolve, reject) => {
-    s3.getObject(s3Obj)
-      .createReadStream()
-      .pipe(file)
-      .on('finish', () => resolve(filename))
-      .on('error', reject);
+    const objectReadStream = s3.getObject(s3Obj).createReadStream();
+
+    pump(objectReadStream, fileWriteStream, (err) => {
+      if (err) reject(err);
+      else resolve(filepath);
+    });
   });
 };
 
diff --git a/packages/common/tests/aws.js b/packages/common/tests/aws.js
index 6bdee2a6838..98eb01fe6f4 100644
--- a/packages/common/tests/aws.js
+++ b/packages/common/tests/aws.js
@@ -1,5 +1,8 @@
 'use strict';
 
+const fs = require('fs');
+const path = require('path');
+const { tmpdir } = require('os');
 const test = require('ava');
 const aws = require('../aws');
 const { randomString } = require('../test-utils');
@@ -43,3 +46,36 @@ test('listS3ObjectsV2 handles truncated case', async (t) => {
 
   return aws.recursivelyDeleteS3Bucket(Bucket);
 });
+
+test('downloadS3File rejects promise if key not found', async (t) => {
+  const Bucket = randomString();
+  await aws.s3().createBucket({ Bucket }).promise();
+
+  try {
+    await aws.downloadS3File({ Bucket, Key: 'not-gonna-find-it' }, '/tmp/wut');
+  }
+  catch (err) {
+    t.is(err.message, 'The specified key does not exist.');
+  }
+});
+
+test('downloadS3File resolves filepath if key is found', async (t) => {
+  const Bucket = randomString();
+  const Key = 'example';
+  const Body = 'example';
+
+  await aws.s3().createBucket({ Bucket }).promise();
+  await aws.s3().putObject({ Bucket, Key: Key, Body: Body }).promise();
+
+  const params = { Bucket, Key: Key };
+  const filepath = await aws.downloadS3File(params, path.join(tmpdir(), 'example'));
+
+  const result = await new Promise((resolve, reject) => {
+    fs.readFile(filepath, 'utf-8', (err, data) => {
+      if (err) reject(err);
+      else resolve(data);
+    });
+  });
+
+  t.is(result, Body);
+});