diff --git a/test/sanity/window-isdevtoolsopen/index.html b/test/sanity/window-isdevtoolsopen/index.html
new file mode 100644
index 0000000000..79b05d877b
--- /dev/null
+++ b/test/sanity/window-isdevtoolsopen/index.html
@@ -0,0 +1,22 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>nw.Window.isDevToolsOpen fixture</title>
+    <script>
+        document.addEventListener('DOMContentLoaded', function() {
+            const win = nw.Window.get();
+            win.showDevTools(undefined, () => {
+                document.getElementById('isdevtoolsopen').textContent = String(win.isDevToolsOpen());
+            });
+        });
+    </script>
+</head>
+<body>
+    <div>
+        <span>win.isDevToolsOpen: </span>
+        <span id="isdevtoolsopen"></span>
+    </div>
+</body>
+</html>
diff --git a/test/sanity/window-isdevtoolsopen/package.json b/test/sanity/window-isdevtoolsopen/package.json
new file mode 100644
index 0000000000..f2e85db4d4
--- /dev/null
+++ b/test/sanity/window-isdevtoolsopen/package.json
@@ -0,0 +1,4 @@
+{
+    "name": "window-isdevtoolsopen",
+    "main": "index.html"
+}
diff --git a/test/sanity/window-isdevtoolsopen/test.py b/test/sanity/window-isdevtoolsopen/test.py
new file mode 100644
index 0000000000..85639ea2bd
--- /dev/null
+++ b/test/sanity/window-isdevtoolsopen/test.py
@@ -0,0 +1,15 @@
+import os
+import platform
+import time
+
+from selenium import webdriver
+from selenium.webdriver.chrome.options import Options
+chrome_options = Options()
+chrome_options.add_argument("nwapp=" + os.path.dirname(os.path.abspath(__file__)))
+
+driver = webdriver.Chrome(executable_path=os.environ['CHROMEDRIVER'], chrome_options=chrome_options, service_log_path="log", service_args=["--verbose"])
+try:
+    result = driver.find_element_by_id('isdevtoolsopen').get_attribute('textContent')
+    assert(result == 'true')
+finally:
+    driver.quit()
