diff --git a/.travis.yml b/.travis.yml
index 151eef6..e9964df 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,3 +10,8 @@ node_js:
 
 cache:
   yarn: true
+
+before_install:
+  - curl -o- -L https://yarnpkg.com/install.sh | bash -s -- --version 1.13.0
+  - export PATH="$HOME/.yarn/bin:$PATH"
+  - yarn --version
diff --git a/appveyor.yml b/appveyor.yml
index 4f47099..e50c567 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -12,6 +12,7 @@ environment:
 
 install:
   - ps: Install-Product node $env:nodejs_version
+  - choco install yarn --version=1.13.0
   - appveyor-retry yarn
   - appveyor-retry yarn add mocha-appveyor-reporter # must be installed locally.
 
diff --git a/tests/index-tests.js b/tests/index-tests.js
index cbc1b46..d9a55d5 100644
--- a/tests/index-tests.js
+++ b/tests/index-tests.js
@@ -67,13 +67,16 @@ describe('resolve-package-path', function() {
           app.pkg.private = true;
           app.pkg.name
           app.pkg.scripts = {
-            test: "node -e 'require(\"resolve-package-path\")(\"ember-source-channel-url\", __dirname)'"
+            test: "node -r ./.pnp.js ./test.js"
           };
           app.pkg.installConfig = {
             pnp: true
           };
           app.addDependency('ember-source-channel-url', '1.1.0');
           app.addDependency('resolve-package-path', 'link:' + path.join(__dirname, '..'));
+          app.files = {
+            'test.js': 'require("resolve-package-path")("ember-source-channel-url", __dirname)'
+          };
         });
 
         app.writeSync();