diff --git a/.travis.yml b/.travis.yml
index f1c06d5..a26b2c8 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,13 +1,30 @@
 language: node_js
-node_js:
-  - "node"
-after_script:
-  - npm run coveralls
+node_js: 14
 
-deploy:
-  provider: script
-  skip_cleanup: true
-  script:
-    - yarn semantic-release
-  on:
-    branch: master
+jobs:
+  include:
+    - &test
+      stage: test
+      os: linux
+      install: yarn
+      script: yarn test
+      after_script: npm run coveralls
+      workspaces:
+        create:
+          name: shared
+          paths:
+            - node_modules
+
+    - <<: *test
+      os: windows
+      env: YARN_GPG=no
+      script: cli/synp.js -s yarn.lock
+      after_script: skip
+      workspaces:
+
+    - stage: release
+      if: branch = master AND type != pull_request
+      workspaces:
+        use: shared
+      install: skip
+      script: yarn release
diff --git a/lib/lockfileV1/tree.js b/lib/lockfileV1/tree.js
index 03b4429..245e925 100644
--- a/lib/lockfileV1/tree.js
+++ b/lib/lockfileV1/tree.js
@@ -1,6 +1,7 @@
 'use strict'
 
 const { sep, resolve } = require('path')
+const { has } = require('lodash')
 const sortObject = require('sort-object-keys')
 const { dependenciesForYarn } = require('./dependencies')
 const { yarnEntry, npmEntry } = require('./entry')
@@ -44,7 +45,7 @@ module.exports = {
     return formattedTree
   },
   buildNpmTree (nodeModulesTree, yarnObject, workspacesTree) {
-    const countDepth = (path) => (path.match(new RegExp(`${sep}node_modules${sep}`, 'g')) || []).length
+    const countDepth = (path) => path.split(`${sep}node_modules${sep}`).length - 1
     const sortedNodeModules = Object.keys(nodeModulesTree).sort((a, b) => countDepth(a) < countDepth(b) ? -1 : 1)
     const basePath = sortedNodeModules[0].split(sep)
 
@@ -63,7 +64,7 @@ module.exports = {
           entry.requires = sortObject(dependencies)
         }
 
-        if ((nodeModulesTree[parentPackagePath(mPath)].devDependencies || {})[name]) {
+        if (has(nodeModulesTree[parentPackagePath(mPath)], `devDependencies.${name}`)) {
           entry.dev = true
         }
 
diff --git a/package.json b/package.json
index 2fd9560..ef392a5 100644
--- a/package.json
+++ b/package.json
@@ -18,6 +18,7 @@
   "scripts": {
     "test": "standard && npm run test:unit",
     "test:unit": "tape ./test/*.spec.js",
+    "test:integration": "cli/synp.js -s yarn.lock",
     "coverage": "nyc --reporter=lcov npm test",
     "coveralls": "nyc npm test && nyc report --reporter=text-lcov | coveralls"
   },