diff --git a/tests/unit-karma/karma.conf.js b/tests/unit-karma/karma.conf.js
index 43fa95e8b67d..73d28c811fb1 100644
--- a/tests/unit-karma/karma.conf.js
+++ b/tests/unit-karma/karma.conf.js
@@ -23,7 +23,7 @@ const browsers = [
   'PhantomJS',
 ];
 
-if (which('iexplore', { nothrow: true })) {
+if (which('iexplore.exe', { nothrow: true })) {
   browsers.push('IE_NFM');
 }