diff --git a/spec/api-browser-window-spec.js b/spec/api-browser-window-spec.js
index 34db4a6ae79a..0acbd4dd770b 100644
--- a/spec/api-browser-window-spec.js
+++ b/spec/api-browser-window-spec.js
@@ -1150,6 +1150,29 @@ describe('BrowserWindow module', function () {
         })
         w.loadURL('file://' + path.join(fixtures, 'pages', 'window-open.html'))
       })
+
+      it('releases memory after popup is closed', (done) => {
+        w.destroy()
+        w = new BrowserWindow({
+          show: false,
+          webPreferences: {
+            preload: preload,
+            sandbox: true
+          }
+        })
+        w.loadURL('file://' + path.join(fixtures, 'api', 'sandbox.html?allocate-memory'))
+        w.webContents.openDevTools({mode: 'detach'})
+        ipcMain.once('answer', function (event, {bytesBeforeOpen, bytesAfterOpen, bytesAfterClose}) {
+          const memoryIncreaseByOpen = bytesAfterOpen - bytesBeforeOpen
+          const memoryDecreaseByClose = bytesAfterOpen - bytesAfterClose
+          // decreased memory should be less than increased due to factors we
+          // can't control, but given the amount of memory allocated in the
+          // fixture, we can reasonably expect decrease to be at least 70% of
+          // increase
+          assert(memoryDecreaseByClose > memoryIncreaseByOpen * 0.7)
+          done()
+        })
+      })
     })
   })
 
diff --git a/spec/fixtures/api/allocate-memory.html b/spec/fixtures/api/allocate-memory.html
new file mode 100644
index 000000000000..ce3140ab0cd2
--- /dev/null
+++ b/spec/fixtures/api/allocate-memory.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html>
+  <head>
+  </head>
+  <body>
+  <script>
+    window.bigBuffer = new Uint8Array(1024 * 1024 * 64)
+    window.bigBuffer.fill(5, 50, 1024 * 1024)
+   </script>
+  </body>
+</html>
diff --git a/spec/fixtures/api/sandbox.html b/spec/fixtures/api/sandbox.html
index a74a1d5d600a..f8d7aa7921de 100644
--- a/spec/fixtures/api/sandbox.html
+++ b/spec/fixtures/api/sandbox.html
@@ -1,5 +1,18 @@
 <html>
 <script type="text/javascript" charset="utf-8">
+  function timeout(ms) {
+    return new Promise((resolve) => {
+      setTimeout(resolve, ms)
+    })
+  }
+  async function invokeGc () {
+    // it seems calling window.gc once does not guarantee garbage will be
+    // collected, so we repeat 10 times with interval of 100 ms
+    for (let i = 0; i < 10; i++) {
+      window.gc()
+      await timeout(100)
+    }
+  }
   if (window.opener) {
     window.callback = () => {
       opener.require('electron').ipcRenderer.send('answer', document.body.innerHTML)
@@ -7,6 +20,20 @@
   } else {
     const {ipcRenderer} = require('electron')
     const tests = {
+      'allocate-memory': async () => {
+        await invokeGc()
+        const {privateBytes: bytesBeforeOpen} = process.getProcessMemoryInfo()
+        let w = open('./allocate-memory.html')
+        await invokeGc()
+        const {privateBytes: bytesAfterOpen} = process.getProcessMemoryInfo()
+        w.close()
+        w = null
+        await invokeGc()
+        const {privateBytes: bytesAfterClose} = process.getProcessMemoryInfo()
+        ipcRenderer.send('answer', {
+          bytesBeforeOpen, bytesAfterOpen, bytesAfterClose
+        })
+      },
       'window-events': () => {
         document.title = 'changed'
       },
