diff --git a/spec/api-shell-spec.js b/spec/api-shell-spec.js
index 9c01866c80fea..ebcd02fcca854 100644
--- a/spec/api-shell-spec.js
+++ b/spec/api-shell-spec.js
@@ -19,8 +19,8 @@ describe('shell module', () => {
   describe('shell.openExternal()', () => {
     let envVars = {}
 
-    beforeEach(() => {
-      // keep original process.env values to prevent side effect
+    beforeEach(function () {
+      if (process.platform === 'win32') this.skip()
       envVars = {
         display: process.env.DISPLAY,
         de: process.env.DE,
@@ -29,31 +29,32 @@ describe('shell module', () => {
     })
 
     afterEach(() => {
-      process.env.BROWSER = envVars.browser
-      process.env.DE = envVars.de
-      process.env.DISPLAY = envVars.display
+      // reset env vars to prevent side effects
+      if (process.platform === 'linux') {
+        process.env.DE = envVars.de
+        process.env.BROWSER = envVars.browser
+        process.env.DISPLAY = envVars.display
+      }
     })
 
     it('opens an external link asynchronously', function (done) {
-      if (process.platform !== 'linux') this.skip()
-
-      // set env vars for xdg-open
       const url = 'http://www.example.com'
-      process.env.DE = 'generic'
-      process.env.BROWSER = '/bin/true'
-      process.env.DISPLAY = ''
+      if (process.platform === 'linux') {
+        process.env.BROWSER = '/bin/true'
+        process.env.DE = 'generic'
+        process.env.DISPLAY = ''
+      }
 
       shell.openExternal(url).then(() => done())
     })
 
     it('opens an external link synchronously', function () {
-      if (process.platform !== 'linux') this.skip()
-
-      // set env vars for xdg-open
       const url = 'http://www.example.com'
-      process.env.DE = 'generic'
-      process.env.BROWSER = '/bin/true'
-      process.env.DISPLAY = ''
+      if (process.platform === 'linux') {
+        process.env.DE = 'generic'
+        process.env.DE = '/bin/true'
+        process.env.DISPLAY = ''
+      }
 
       const success = shell.openExternalSync(url)
       assert.strictEqual(true, success)
diff --git a/spec/package-lock.json b/spec/package-lock.json
index 2717758d64ae6..737fa4094fec2 100644
--- a/spec/package-lock.json
+++ b/spec/package-lock.json
@@ -72,7 +72,7 @@
     },
     "bl": {
       "version": "1.2.2",
-      "resolved": "http://registry.npmjs.org/bl/-/bl-1.2.2.tgz",
+      "resolved": "https://registry.npmjs.org/bl/-/bl-1.2.2.tgz",
       "integrity": "sha512-e8tQYnZodmebYDWGH7KMRvtzKXaJHx3BbilrgZCfvyLUYdKpK1t5PSPmpkny/SgiTSCnjfLW7v5rlONXVFkQEA==",
       "optional": true,
       "requires": {
@@ -228,7 +228,7 @@
     },
     "commander": {
       "version": "2.15.1",
-      "resolved": "http://registry.npmjs.org/commander/-/commander-2.15.1.tgz",
+      "resolved": "https://registry.npmjs.org/commander/-/commander-2.15.1.tgz",
       "integrity": "sha512-VlfT9F3V0v+jr4yxPc5gg9s62/fIVWsd2Bk2iD435um1NlGMYdVCq+MjcXnhYq2icNOizHr1kK+5TI6H0Hy0ag==",
       "dev": true
     },
@@ -267,7 +267,7 @@
     },
     "dbus-native": {
       "version": "0.2.5",
-      "resolved": "http://registry.npmjs.org/dbus-native/-/dbus-native-0.2.5.tgz",
+      "resolved": "https://registry.npmjs.org/dbus-native/-/dbus-native-0.2.5.tgz",
       "integrity": "sha512-ocxMKCV7QdiNhzhFSeEMhj258OGtvpANSb3oWGiotmI5h1ZIse0TMPcSLiXSpqvbYvQz2Y5RsYPMNYLWhg9eBw==",
       "dev": true,
       "requires": {
@@ -358,7 +358,7 @@
     },
     "duplexer": {
       "version": "0.1.1",
-      "resolved": "http://registry.npmjs.org/duplexer/-/duplexer-0.1.1.tgz",
+      "resolved": "https://registry.npmjs.org/duplexer/-/duplexer-0.1.1.tgz",
       "integrity": "sha1-rOb/gIwc5mtX0ev5eXessCM0z8E=",
       "dev": true
     },
@@ -508,7 +508,7 @@
     },
     "get-stream": {
       "version": "3.0.0",
-      "resolved": "http://registry.npmjs.org/get-stream/-/get-stream-3.0.0.tgz",
+      "resolved": "https://registry.npmjs.org/get-stream/-/get-stream-3.0.0.tgz",
       "integrity": "sha1-jpQ9E1jcN1VQVOy+LtsFqhdO3hQ=",
       "dev": true
     },
@@ -749,7 +749,7 @@
     },
     "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=",
       "requires": {
         "minimist": "0.0.8"
@@ -757,7 +757,7 @@
       "dependencies": {
         "minimist": {
           "version": "0.0.8",
-          "resolved": "http://registry.npmjs.org/minimist/-/minimist-0.0.8.tgz",
+          "resolved": "https://registry.npmjs.org/minimist/-/minimist-0.0.8.tgz",
           "integrity": "sha1-hX/Kv8M5fSYluCKCYuhqp6ARsF0="
         }
       }
@@ -937,7 +937,7 @@
     },
     "os-homedir": {
       "version": "1.0.2",
-      "resolved": "http://registry.npmjs.org/os-homedir/-/os-homedir-1.0.2.tgz",
+      "resolved": "https://registry.npmjs.org/os-homedir/-/os-homedir-1.0.2.tgz",
       "integrity": "sha1-/7xJiDNuDoM94MFox+8VISGqf7M=",
       "optional": true
     },
@@ -954,7 +954,7 @@
     },
     "os-tmpdir": {
       "version": "1.0.2",
-      "resolved": "http://registry.npmjs.org/os-tmpdir/-/os-tmpdir-1.0.2.tgz",
+      "resolved": "https://registry.npmjs.org/os-tmpdir/-/os-tmpdir-1.0.2.tgz",
       "integrity": "sha1-u+Z0BseaqFxc/sdm/lc0VV36EnQ=",
       "dev": true
     },
@@ -996,7 +996,7 @@
     },
     "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
     },
@@ -1014,7 +1014,7 @@
     },
     "pause-stream": {
       "version": "0.0.11",
-      "resolved": "http://registry.npmjs.org/pause-stream/-/pause-stream-0.0.11.tgz",
+      "resolved": "https://registry.npmjs.org/pause-stream/-/pause-stream-0.0.11.tgz",
       "integrity": "sha1-/lo0sMvOErWqaitAPuLnO2AvFEU=",
       "dev": true,
       "requires": {
@@ -1135,7 +1135,7 @@
     },
     "rimraf": {
       "version": "2.2.8",
-      "resolved": "http://registry.npmjs.org/rimraf/-/rimraf-2.2.8.tgz",
+      "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-2.2.8.tgz",
       "integrity": "sha1-5Dm+Kq7jJzIZUnMPmaiSnk/FBYI=",
       "dev": true
     },
@@ -1310,7 +1310,7 @@
     },
     "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==",
       "requires": {
         "safe-buffer": "~5.1.0"
@@ -1326,7 +1326,7 @@
     },
     "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
     },
@@ -1396,7 +1396,7 @@
     },
     "through": {
       "version": "2.3.8",
-      "resolved": "http://registry.npmjs.org/through/-/through-2.3.8.tgz",
+      "resolved": "https://registry.npmjs.org/through/-/through-2.3.8.tgz",
       "integrity": "sha1-DdTJ/6q8NXlgsbckEV1+Doai4fU=",
       "dev": true
     },
@@ -1491,7 +1491,7 @@
     },
     "wrap-ansi": {
       "version": "2.1.0",
-      "resolved": "http://registry.npmjs.org/wrap-ansi/-/wrap-ansi-2.1.0.tgz",
+      "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-2.1.0.tgz",
       "integrity": "sha1-2Pw9KE3QV5T+hJc8rs3Rz4JP3YU=",
       "dev": true,
       "requires": {