diff --git a/lib/utils/is-windows-bash.js b/lib/utils/is-windows-bash.js
index 33773abb0cd53..0a6c179680e8c 100644
--- a/lib/utils/is-windows-bash.js
+++ b/lib/utils/is-windows-bash.js
@@ -1,4 +1,4 @@
 'use strict'
 var isWindows = require('./is-windows.js')
 module.exports = isWindows &&
-  (/^MINGW(32|64)$/.test(process.env.MSYSTEM) || process.env.TERM === "cygwin")
+  (/^MINGW(32|64)$/.test(process.env.MSYSTEM) || process.env.TERM === 'cygwin')