diff --git a/umap/static/umap/unittests/URLs.js b/umap/static/umap/unittests/URLs.js
index 53c7448f..3edd3560 100644
--- a/umap/static/umap/unittests/URLs.js
+++ b/umap/static/umap/unittests/URLs.js
@@ -8,10 +8,10 @@ import URLs from '../js/modules/urls.js'
 describe('URLs', () => {
   // Mock server URLs that will be used for testing
   const mockServerUrls = {
-    map_create: '/maps/create',
-    map_update: '/maps/{map_id}/update',
-    datalayer_create: '/maps/{map_id}/datalayers/create',
-    datalayer_update: '/maps/{map_id}/datalayers/{pk}/update',
+    map_create: '/maps/create/',
+    map_update: '/maps/{map_id}/update/',
+    datalayer_create: '/maps/{map_id}/datalayers/{pk}/create/',
+    datalayer_update: '/maps/{map_id}/datalayers/{pk}/update/',
   }
 
   let urls = new URLs(mockServerUrls)
@@ -22,37 +22,37 @@ describe('URLs', () => {
     })
 
     it('should return the correct templated URL for known urlNames', () => {
-      expect(urls.get('map_create')).to.be.equal('/maps/create')
-      expect(urls.get('map_update', { map_id: '123' })).to.be.equal('/maps/123/update')
+      expect(urls.get('map_create')).to.be.equal('/maps/create/')
+      expect(urls.get('map_update', { map_id: '123' })).to.be.equal('/maps/123/update/')
     })
 
     it('should return the correct templated URL when provided with parameters', () => {
       expect(urls.get('datalayer_update', { map_id: '123', pk: '456' })).to.be.equal(
-        '/maps/123/datalayers/456/update'
+        '/maps/123/datalayers/456/update/'
       )
     })
   })
 
   describe('map_save()', () => {
     it('should return the create URL if no map_id is provided', () => {
-      expect(urls.map_save({})).to.be.equal('/maps/create')
+      expect(urls.map_save({})).to.be.equal('/maps/create/')
     })
 
     it('should return the update URL if a map_id is provided', () => {
-      expect(urls.map_save({ map_id: '123' })).to.be.equal('/maps/123/update')
+      expect(urls.map_save({ map_id: '123' })).to.be.equal('/maps/123/update/')
     })
   })
 
   describe('datalayer_save()', () => {
-    it('should return the create URL if no pk is provided', () => {
-      expect(urls.datalayer_save({ map_id: '123' })).to.be.equal(
-        '/maps/123/datalayers/create'
+    it('should return the create URL if created is false', () => {
+      expect(urls.datalayer_save({ map_id: '123', pk: '00000000-0000-0000-0000-000000000000', created: false })).to.be.equal(
+        '/maps/123/datalayers/00000000-0000-0000-0000-000000000000/create/'
       )
     })
 
-    it('should return the update URL if a pk is provided', () => {
-      expect(urls.datalayer_save({ map_id: '123', pk: '456' })).to.be.equal(
-        '/maps/123/datalayers/456/update'
+    it('should return the update URL if created is true', () => {
+      expect(urls.datalayer_save({ map_id: '123', pk: '00000000-0000-0000-0000-000000000000', created: true })).to.be.equal(
+        '/maps/123/datalayers/00000000-0000-0000-0000-000000000000/update/'
       )
     })
   })