diff --git a/index.js b/index.js
@@ -61,7 +61,13 @@ let configFile
 if (argv.env) process.env.NODE_ENV = argv.env
 if (argv.config) argv.config = path.resolve(argv.config)
 
-if (argv.watch) {
+let { isTTY } = process.stdin
+
+if (process.env.FORCE_IS_TTY === 'true') {
+  isTTY = true
+}
+
+if (argv.watch && isTTY) {
   process.stdin.on('end', () => process.exit(0))
   process.stdin.resume()
 }

diff --git a/test/watch.js b/test/watch.js
@@ -205,13 +205,18 @@ testCb('--watch does exit on closing stdin (Ctrl-D/EOF)', (t) => {
 
   const cp = spawn(`./index.js test/fixtures/a.css -o ${tmp()} -w --no-map`, {
     shell: true,
+    env: {
+      ...process.env,
+      FORCE_IS_TTY: true,
+    },
   })
 
   cp.on('error', t.end)
   cp.on('exit', (code) => {
     t.is(code, 0)
     t.end()
   })
+
   cp.stdin.end()
 })