diff --git a/lib/options.js b/lib/options.js
index 98dc04b6eb3..1681f1dbd1d 100644
--- a/lib/options.js
+++ b/lib/options.js
@@ -46,7 +46,6 @@ module.exports = optionator({
         {
             option: "ext",
             type: "[String]",
-            default: ".js",
             description: "Specify JavaScript file extensions"
         },
         {
diff --git a/tests/lib/options.js b/tests/lib/options.js
index 940804aeeef..c84e46d9afd 100644
--- a/tests/lib/options.js
+++ b/tests/lib/options.js
@@ -79,11 +79,10 @@ describe("options", () => {
             assert.strictEqual(currentOptions.ext[1], ".js");
         });
 
-        it("should return an array one item when not passed", () => {
+        it("should not exist when not passed", () => {
             const currentOptions = options.parse("");
 
-            assert.isArray(currentOptions.ext);
-            assert.strictEqual(currentOptions.ext[0], ".js");
+            assert.notProperty(currentOptions, "ext");
         });
     });