diff --git a/circle.yml b/circle.yml
index d243c57e21b..6529b31d8fc 100644
--- a/circle.yml
+++ b/circle.yml
@@ -1,6 +1,6 @@
 machine:
   pre:
-    - echo 'DOCKER_OPTS="-s btrfs -e lxc -D --userland-proxy=false"' | sudo tee -a /etc/default/docker
+    - echo 'DOCKER_OPTS="-s btrfs -e lxc --userland-proxy=false"' | sudo tee -a /etc/default/docker
     - sudo curl -L -o /usr/bin/docker 'https://s3-external-1.amazonaws.com/circle-downloads/docker-1.9.1-circleci-cp-workaround'
     - sudo chmod 0755 /usr/bin/docker
   services:
diff --git a/tests/apps/checks-root/package.json b/tests/apps/checks-root/package.json
index bcf2297570f..d378c6327df 100644
--- a/tests/apps/checks-root/package.json
+++ b/tests/apps/checks-root/package.json
@@ -5,8 +5,7 @@
     "express": "4.x"
   },
   "engines": {
-    "node": "0.12.x",
-    "npm": "2.x"
+    "node": "4.2.x"
   },
   "scripts": {
     "start": "node index.js"
diff --git a/tests/apps/config/package.json b/tests/apps/config/package.json
index eb17caf0c4a..ce01f3afac8 100644
--- a/tests/apps/config/package.json
+++ b/tests/apps/config/package.json
@@ -5,7 +5,6 @@
     "express": "2.5.x"
   },
   "engines": {
-    "node": "0.10.x",
-    "npm": "2.7.x"
+    "node": "4.2.x"
   }
 }
diff --git a/tests/apps/dockerfile-noexpose/package.json b/tests/apps/dockerfile-noexpose/package.json
index 29e7c9f3ee7..84913e3a00e 100644
--- a/tests/apps/dockerfile-noexpose/package.json
+++ b/tests/apps/dockerfile-noexpose/package.json
@@ -10,7 +10,7 @@
     "express": "^4.0.0"
   },
   "engines": {
-    "node": "0.10.x"
+    "node": "4.2.x"
   },
   "repository": {
     "type": "git",
diff --git a/tests/apps/dockerfile/package.json b/tests/apps/dockerfile/package.json
index 29e7c9f3ee7..84913e3a00e 100644
--- a/tests/apps/dockerfile/package.json
+++ b/tests/apps/dockerfile/package.json
@@ -10,7 +10,7 @@
     "express": "^4.0.0"
   },
   "engines": {
-    "node": "0.10.x"
+    "node": "4.2.x"
   },
   "repository": {
     "type": "git",
diff --git a/tests/apps/gitsubmodules/package.json b/tests/apps/gitsubmodules/package.json
index ca800a5dfe1..746045c5139 100644
--- a/tests/apps/gitsubmodules/package.json
+++ b/tests/apps/gitsubmodules/package.json
@@ -5,7 +5,6 @@
     "express": "~3.3.4"
   },
   "engines": {
-    "node": "0.10.x",
-    "npm": "2.7.x"
+    "node": "4.2.x"
   }
 }
diff --git a/tests/apps/multi/package.json b/tests/apps/multi/package.json
index 84a290444b6..4d8c4079110 100644
--- a/tests/apps/multi/package.json
+++ b/tests/apps/multi/package.json
@@ -10,7 +10,7 @@
   },
   "description": "Test application for heroku multi buildpack.",
   "engines": {
-    "node": "~0.10.30"
+    "node": "4.2.x"
   },
   "license": "ISC",
   "name": "test-buildpack-multi",
diff --git a/tests/apps/nodejs-express-noprocfile/package.json b/tests/apps/nodejs-express-noprocfile/package.json
index 6f8ca43e18c..c4c1a905ac1 100644
--- a/tests/apps/nodejs-express-noprocfile/package.json
+++ b/tests/apps/nodejs-express-noprocfile/package.json
@@ -5,8 +5,7 @@
     "express": "2.5.x"
   },
   "engines": {
-    "node": "0.10.x",
-    "npm": "2.7.x"
+    "node": "4.2.x"
   },
   "scripts": {
     "start": "node web.js"
diff --git a/tests/apps/nodejs-express/package.json b/tests/apps/nodejs-express/package.json
index eb17caf0c4a..ce01f3afac8 100644
--- a/tests/apps/nodejs-express/package.json
+++ b/tests/apps/nodejs-express/package.json
@@ -5,7 +5,6 @@
     "express": "2.5.x"
   },
   "engines": {
-    "node": "0.10.x",
-    "npm": "2.7.x"
+    "node": "4.2.x"
   }
 }
diff --git a/tests/apps/nodejs-worker/package.json b/tests/apps/nodejs-worker/package.json
index a02e1894bba..b69ca221688 100644
--- a/tests/apps/nodejs-worker/package.json
+++ b/tests/apps/nodejs-worker/package.json
@@ -2,7 +2,6 @@
   "name": "node-example",
   "version": "0.0.1",
   "engines": {
-    "node": "0.10.x",
-    "npm": "2.7.x"
+    "node": "4.2.x"
   }
 }