diff --git a/lib/support/cli.js b/lib/support/cli.js
index 2214d191c..01cab6a5b 100644
--- a/lib/support/cli.js
+++ b/lib/support/cli.js
@@ -146,7 +146,10 @@ function validateInput(argv) {
 export function parseCommandLine() {
   let yargsInstance = yargs(hideBin(process.argv));
   let validated = yargsInstance
-    .parserConfiguration({ 'deep-merge-config': true })
+    .parserConfiguration({
+      'camel-case-expansion': false,
+      'deep-merge-config': true
+    })
     .env('BROWSERTIME')
     .usage('$0 [options] <url>/<scriptFile>')
     .require(1, 'One or more url or script files')