diff --git a/build/tasks/e2e.js b/build/tasks/e2e.js
index 8888188e..c2828e83 100644
--- a/build/tasks/e2e.js
+++ b/build/tasks/e2e.js
@@ -12,7 +12,7 @@ gulp.task('test-server', function (done) {
       baseDir: './tests/e2e',
       routes: {
         '/dist': './dist',
-        '/swagger.json': './demo/swagger.json'
+        '/swagger.yml': './demo/swagger.yml'
       },
     }
   }, done);
diff --git a/tests/e2e/index.html b/tests/e2e/index.html
index 30d11c24..599429c5 100644
--- a/tests/e2e/index.html
+++ b/tests/e2e/index.html
@@ -14,7 +14,7 @@
     <script>
       window.redocError = null;
       /* init redoc */
-      var url = window.location.search.substr(5) || 'swagger.json';
+      var url = window.location.search.substr(5) || 'swagger.yml';
       Redoc.init(decodeURIComponent(url), {disableLazySchemas: true}).then(function() {}, function(err) {
         window.redocError = err;
       });