diff --git a/npm-shrinkwrap.json b/npm-shrinkwrap.json
index 8e32971e..10b9e3b7 100644
--- a/npm-shrinkwrap.json
+++ b/npm-shrinkwrap.json
@@ -6339,10 +6339,6 @@
       "resolved": "https://registry.npmjs.org/tracery/-/tracery-1.0.3.tgz",
       "dev": true
     },
-    "trackjs": {
-      "version": "2.3.1",
-      "resolved": "https://registry.npmjs.org/trackjs/-/trackjs-2.3.1.tgz"
-    },
     "traverse": {
       "version": "0.3.9",
       "resolved": "https://registry.npmjs.org/traverse/-/traverse-0.3.9.tgz",
diff --git a/package.json b/package.json
index 01e17ca4..f1f1646b 100644
--- a/package.json
+++ b/package.json
@@ -82,7 +82,6 @@
     "semver": "5.1.1",
     "speedometer": "1.0.0",
     "sudo-prompt": "8.0.0",
-    "trackjs": "2.3.1",
     "udif": "0.13.0",
     "unbzip2-stream": "github:resin-io-modules/unbzip2-stream#core-streams",
     "usb": "github:tessel/node-usb#1.3.0",
diff --git a/tests/image-stream/tester.js b/tests/image-stream/tester.js
index beb1e054..14eba877 100644
--- a/tests/image-stream/tester.js
+++ b/tests/image-stream/tester.js
@@ -34,17 +34,17 @@ const doFilesContainTheSameData = (file1, file2) => {
 }
 
 const deleteIfExists = (file) => {
-  return Bluebird.try(() => {
+  return new Bluebird((resolve, reject) => {
     try {
       fs.accessSync(file)
       fs.unlinkSync(file)
     } catch (error) {
       if (error.code !== 'ENOENT') {
-        return Bluebird.reject(error)
+        return reject(error)
       }
     }
 
-    return Bluebird.resolve()
+    resolve()
   })
 }