Fixed test command for JS tests.
diff --git a/travis.sh b/travis.sh
index 27e4990..97a769d 100755
--- a/travis.sh
+++ b/travis.sh
@@ -275,7 +275,7 @@
 
 build_javascript() {
   internal_build_cpp
-  cd js && npm install && gulp test && cd ..
+  cd js && npm install && npm test && cd ..
 }
 
 # -------- main --------