diff --git a/app/assets/javascripts/src/Metamaps.Import.js b/app/assets/javascripts/src/Metamaps.Import.js
index 159298b8..e82a05c5 100644
--- a/app/assets/javascripts/src/Metamaps.Import.js
+++ b/app/assets/javascripts/src/Metamaps.Import.js
@@ -320,5 +320,3 @@ Metamaps.Import = {
     Metamaps.Synapse.renderSynapse(mapping, synapse, node1, node2, true)
   }
 }
-
-module.exports = Metamaps.Import
diff --git a/app/assets/javascripts/test/Metamaps.Import.spec.js b/app/assets/javascripts/test/Metamaps.Import.spec.js
index d8993e42..cf8d6f53 100644
--- a/app/assets/javascripts/test/Metamaps.Import.spec.js
+++ b/app/assets/javascripts/test/Metamaps.Import.spec.js
@@ -1,11 +1,12 @@
-var chai = require('chai')
-var expect = chai.expect
+/* global describe, it */
+const chai = require('chai')
+const expect = chai.expect
 
-Metamaps = {}
-Metamaps.Import = require('../src/Metamaps.Import')
+const Metamaps = {}
+require('../src/Metamaps.Import')
 
-describe('Metamaps.Import.js', function() {
-  it('has a topic whitelist', function() {
+describe('Metamaps.Import.js', function () {
+  it('has a topic whitelist', function () {
     expect(Metamaps.Import.topicWhitelist).to.deep.equal(
       ['id', 'name', 'metacode', 'x', 'y', 'description', 'link', 'permission']
     )
diff --git a/app/policies/mapping_policy.rb b/app/policies/mapping_policy.rb
index 5826ccd4..ce8522df 100644
--- a/app/policies/mapping_policy.rb
+++ b/app/policies/mapping_policy.rb
@@ -16,7 +16,7 @@ class MappingPolicy < ApplicationPolicy
   end
 
   def show?
-    map_policy.show? && mappable_policy.show?
+    map_policy.show? && mappable_policy.try(:show?)
   end
 
   def create?