diff --git a/.github/workflows/node-windows.yml b/.github/workflows/node-windows.yml
new file mode 100644
index 00000000000..934baa0cfb3
--- /dev/null
+++ b/.github/workflows/node-windows.yml
@@ -0,0 +1,32 @@
+name: Node
+
+on: [push]
+
+jobs:
+  build:
+
+    runs-on: windows-2019
+
+    strategy:
+      matrix:
+        node: [ '10', '6' ]
+
+    name: ${{ matrix.node }} (Windows)
+    steps:
+    - name: Configure git line-breaks
+      run: git config --global core.autocrlf false
+    - name: Checkout Commit
+      uses: actions/checkout@v1
+    - name: Setup Node
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ matrix.node }}
+    - name: Check npm version
+      # This is only necessary until we dump Node 6
+      run: IF ${{ matrix.node }} LSS 8 npm i npm@5 -g
+    - name: Install dependencies
+      run: npm ci --ignore-scripts
+    - name: Run tests
+      run: npm test
+      env:
+        CI: true
diff --git a/appveyor.yml b/appveyor.yml
deleted file mode 100644
index 96d7adb4ca4..00000000000
--- a/appveyor.yml
+++ /dev/null
@@ -1,32 +0,0 @@
-# http://www.appveyor.com/docs/appveyor-yml
-
-version: "{build}"
-
-clone_depth: 10
-
-init:
-  - git config --global core.autocrlf false
-
-environment:
-  matrix:
-    # node.js
-    - nodejs_version: 6
-    - nodejs_version: 10
-
-install:
-  - ps: Install-Product node $env:nodejs_version
-  - IF %nodejs_version% LSS 8 npm -g install npm@5
-  - npm ci --ignore-scripts
-
-build: off
-
-test_script:
-  - node --version && npm --version
-  - npm test
-
-matrix:
-  fast_finish: false
-
-# cache:
-#   - C:\Users\appveyor\AppData\Roaming\npm-cache -> package.json     # npm cache
-#   - node_modules -> package.json                                    # local npm modules
diff --git a/package-lock.json b/package-lock.json
index 7037461dc63..d247f2b96e7 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -240,7 +240,7 @@
     },
     "@types/minimist": {
       "version": "1.2.0",
-      "resolved": "http://registry.npmjs.org/@types/minimist/-/minimist-1.2.0.tgz",
+      "resolved": "https://registry.npmjs.org/@types/minimist/-/minimist-1.2.0.tgz",
       "integrity": "sha1-aaI6OtKcrwCX8G7aWbNh7i8GOfY=",
       "dev": true
     },
@@ -1093,6 +1093,12 @@
         }
       }
     },
+    "cross-os": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/cross-os/-/cross-os-1.3.0.tgz",
+      "integrity": "sha512-9kViqCcAwlPLTeSDPlyC2FdMQ5UVPtGZUnGV8vYDcBA3olJ/hDR7H6IfrNJft2DlKONleHf8CMhD+7Uv2tBnEw==",
+      "dev": true
+    },
     "cross-spawn": {
       "version": "6.0.5",
       "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-6.0.5.tgz",
@@ -3408,7 +3414,7 @@
     },
     "is-obj": {
       "version": "1.0.1",
-      "resolved": "http://registry.npmjs.org/is-obj/-/is-obj-1.0.1.tgz",
+      "resolved": "https://registry.npmjs.org/is-obj/-/is-obj-1.0.1.tgz",
       "integrity": "sha1-PkcprB9f3gJc19g6iW2rn09n2w8=",
       "dev": true
     },
@@ -4274,7 +4280,7 @@
     },
     "mkdirp": {
       "version": "0.5.1",
-      "resolved": "http://registry.npmjs.org/mkdirp/-/mkdirp-0.5.1.tgz",
+      "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.1.tgz",
       "integrity": "sha1-MAV0OOrGz3+MR2fzhkjWaX11yQM=",
       "dev": true,
       "requires": {
@@ -4960,7 +4966,7 @@
     },
     "path-is-absolute": {
       "version": "1.0.1",
-      "resolved": "http://registry.npmjs.org/path-is-absolute/-/path-is-absolute-1.0.1.tgz",
+      "resolved": "https://registry.npmjs.org/path-is-absolute/-/path-is-absolute-1.0.1.tgz",
       "integrity": "sha1-F0uSaHNVNP+8es5r9TpanhtcX18=",
       "dev": true
     },
@@ -5137,7 +5143,7 @@
     },
     "readable-stream": {
       "version": "2.3.6",
-      "resolved": "http://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
+      "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
       "integrity": "sha512-tQtKA9WIAhBF3+VLAseyMqZeBjW0AHJoxOtYqSUZNJxauErmLbVm2FW1y+J/YA9dUrAC39ITejlZWhVIwawkKw==",
       "dev": true,
       "requires": {
@@ -5585,7 +5591,7 @@
     },
     "safe-regex": {
       "version": "1.1.0",
-      "resolved": "http://registry.npmjs.org/safe-regex/-/safe-regex-1.1.0.tgz",
+      "resolved": "https://registry.npmjs.org/safe-regex/-/safe-regex-1.1.0.tgz",
       "integrity": "sha1-QKNmnzsHfR6UPURinhV91IAjvy4=",
       "dev": true,
       "requires": {
@@ -5970,7 +5976,7 @@
     },
     "string_decoder": {
       "version": "1.1.1",
-      "resolved": "http://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
+      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
       "integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
       "dev": true,
       "requires": {
@@ -6005,7 +6011,7 @@
     },
     "strip-eof": {
       "version": "1.0.0",
-      "resolved": "http://registry.npmjs.org/strip-eof/-/strip-eof-1.0.0.tgz",
+      "resolved": "https://registry.npmjs.org/strip-eof/-/strip-eof-1.0.0.tgz",
       "integrity": "sha1-u0P/VZim6wXYm1n80SnJgzE2Br8=",
       "dev": true
     },
diff --git a/package.json b/package.json
index cb0e6b4cf78..87604081782 100644
--- a/package.json
+++ b/package.json
@@ -32,7 +32,13 @@
     "test": "npm run test:all",
     "test:all": "npm run test:only && npm run test:typescript && npm run test:leak",
     "test:coverage": "nyc --reporter html mocha",
-    "test:leak": "npm i --silent --no-save weak@1 && node --expose-gc test/leak/index.js",
+    "test:leak": "cross-os test:leak:os",
+    "test:leak:os": {
+      "darwin": "npm run test:leak:nix",
+      "linux": "npm run test:leak:nix",
+      "win32": "echo 'Skipping test:leak on Windows'"
+    },
+    "test:leak:nix": "npm i --silent --no-save weak@1 && node --expose-gc test/leak/index.js",
     "test:only": "mocha",
     "test:quick": "mocha -b",
     "test:typescript": "tsc --noEmit -p test/typescript && tsc --noEmit",
@@ -73,6 +79,7 @@
     "codecov": "^3.5.0",
     "console-group": "^0.3.3",
     "core-js": "^3.2.1",
+    "cross-os": "^1.3.0",
     "date-time": "^3.1.0",
     "es5-shim": "^4.5.13",
     "es6-shim": "^0.35.5",