diff --git a/db/fixtures/lessons/javascript_lessons.rb b/db/fixtures/lessons/javascript_lessons.rb
index 10229d9934..2a46894412 100644
--- a/db/fixtures/lessons/javascript_lessons.rb
+++ b/db/fixtures/lessons/javascript_lessons.rb
@@ -131,35 +131,35 @@ def javascript_lessons
       title: 'JSON',
       description: 'JSON',
       is_project: false,
-      url: '/javascript/async-apis/json.md',
+      url: '/javascript/asynchronous_javascript_and_apis/json.md',
       identifier_uuid: 'ae0d44bf-60b7-4644-b61e-216a4a6b271b',
     },
     'Asynchronous Code' => {
       title: 'Asynchronous Code',
       description: 'Introduction to asynchronous programming',
       is_project: false,
-      url: '/javascript/async-apis/promises-async.md',
+      url: '/javascript/asynchronous_javascript_and_apis/asynchronous_code.md',
       identifier_uuid: '31ab5898-fd2b-48c4-9070-0e8b622b0805',
     },
     'Working with APIs' => {
       title: 'Working with APIs',
       description: 'Working with APIs',
       is_project: false,
-      url: '/javascript/async-apis/APIs.md',
+      url: '/javascript/asynchronous_javascript_and_apis/working_with_apis.md',
       identifier_uuid: '8ce12e98-3413-4d0a-a749-0701ae959f6a',
     },
     'Async and Await' => {
       title: 'Async and Await',
       description: 'Async and Await',
       is_project: false,
-      url: '/javascript/async-apis/async-await.md',
+      url: '/javascript/asynchronous_javascript_and_apis/async_and_await.md',
       identifier_uuid: '70e6bedf-98ce-47bb-80fd-5d8ecf6f9f8b',
     },
     'Weather App' => {
       title: 'Weather App',
       description: 'Weather App',
       is_project: true,
-      url: '/javascript/async-apis/project.md',
+      url: '/javascript/asynchronous_javascript_and_apis/project_weather_app.md',
       accepts_submission: true,
       has_live_preview: true,
       identifier_uuid: '5212a020-85ed-4e43-84ec-6b583b57e8cb',
@@ -168,14 +168,14 @@ def javascript_lessons
       title: 'Testing Basics',
       description: 'Testing Basics',
       is_project: false,
-      url: '/javascript/testing/testing-1.md',
+      url: '/javascript/testing_javascript/testing_basics.md',
       identifier_uuid: 'fcb8c8f9-7475-47bf-82a0-4df6a4afdf96',
     },
     'Testing Practice' => {
       title: 'Testing Practice',
       description: 'Testing Practice',
       is_project: true,
-      url: '/javascript/testing/testing-practice.md',
+      url: '/javascript/testing_javascript/project_testing_practice.md',
       accepts_submission: true,
       has_live_preview: false,
       identifier_uuid: '319ce38c-f68b-4bba-b9f7-25df452f0523',
@@ -184,14 +184,14 @@ def javascript_lessons
       title: 'More Testing',
       description: 'More Testing',
       is_project: false,
-      url: '/javascript/testing/testing-2.md',
+      url: '/javascript/testing_javascript/more_testing.md',
       identifier_uuid: '82c12ec2-9a10-4177-8dfd-d87d34685983',
     },
     'Battleship' => {
       title: 'Battleship',
       description: 'Battleship',
       is_project: true,
-      url: '/javascript/testing/battleship-project.md',
+      url: '/javascript/testing_javacript/project_battleship.md',
       accepts_submission: true,
       has_live_preview: true,
       identifier_uuid: '62702165-7705-47ba-a308-dd39c561e057',
diff --git a/db/fixtures/lessons/react_lessons.rb b/db/fixtures/lessons/react_lessons.rb
index 715a68decb..a228220ea3 100644
--- a/db/fixtures/lessons/react_lessons.rb
+++ b/db/fixtures/lessons/react_lessons.rb
@@ -4,28 +4,28 @@ def react_lessons
       title: 'React Introduction',
       description: 'React Introduction',
       is_project: false,
-      url: '/javascript/react-js/react-introduction.md',
+      url: '/javascript/react_js/react_introduction.md',
       identifier_uuid: '147b4b39-9725-4ef0-94bb-be13de0907fb',
     },
     'State and Props' => {
       title: 'State and Props',
       description: 'State and Props',
       is_project: false,
-      url: '/javascript/react-js/state-and-props.md',
+      url: '/javascript/react_js/state_and_props.md',
       identifier_uuid: '62dac0e1-2acc-4392-b5b5-a12e010f50e4',
     },
     'Handle Inputs and Render Lists' => {
       title: 'Handle Inputs and Render Lists',
       description: 'Handle Inputs and Render Lists',
       is_project: false,
-      url: '/javascript/react-js/inputs-and-lists.md',
+      url: '/javascript/react_js/handle_inputs_and_render_lists.md',
       identifier_uuid: '4ad5f107-7f36-4606-bf87-59b07e2558c8',
     },
     'CV Application' => {
       title: 'CV Application',
       description: 'CV Application',
       is_project: true,
-      url: '/javascript/react-js/project-cv.md',
+      url: '/javascript/react_js/project_cv_application.md',
       accepts_submission: true,
       has_live_preview: true,
       identifier_uuid: 'f3b5cee3-a255-4c72-8022-942cbddf0b86',
@@ -34,21 +34,21 @@ def react_lessons
       title: 'Lifecycle Methods',
       description: 'Lifecycle Methods',
       is_project: false,
-      url: '/javascript/react-js/lifecycle-methods.md',
+      url: '/javascript/react_js/lifecycle_methods.md',
       identifier_uuid: '64f06d1e-44a6-41f6-a34b-f9f713c76aab',
     },
     'Hooks' => {
       title: 'Hooks',
       description: 'Hooks',
       is_project: false,
-      url: '/javascript/react-js/hooks.md',
+      url: '/javascript/react_js/hooks.md',
       identifier_uuid: 'a427cd6c-e001-4c52-80f8-f538883ffc39',
     },
     'Memory Card' => {
       title: 'Memory Card',
       description: 'Memory Card',
       is_project: true,
-      url: '/javascript/react-js/project-memory-card.md',
+      url: '/javascript/react_js/project_memory_card.md',
       accepts_submission: true,
       has_live_preview: true,
       identifier_uuid: '87bbed05-daf2-4c45-a549-fc9ecfa2657c',
@@ -57,14 +57,14 @@ def react_lessons
       title: 'Router',
       description: 'Router',
       is_project: false,
-      url: '/javascript/react-js/router.md',
+      url: '/javascript/react_js/router.md',
       identifier_uuid: 'f34f2b12-a3fd-41a1-9726-140a1ebde5f1',
     },
     'Shopping Cart' => {
       title: 'Shopping Cart',
       description: 'Shopping Cart',
       is_project: true,
-      url: '/javascript/react-js/project-shopping-chart.md',
+      url: '/javascript/react_js/project_shopping_cart.md',
       accepts_submission: true,
       has_live_preview: true,
       identifier_uuid: '60bb8597-19db-4d6f-9eca-059743206de5',
@@ -73,21 +73,21 @@ def react_lessons
       title: 'Advanced Concepts',
       description: 'Advanced Concepts',
       is_project: false,
-      url: '/javascript/react-js/advanced-concepts.md',
+      url: '/javascript/react_js/advanced_concepts.md',
       identifier_uuid: 'e2a290b1-cc94-498b-ba32-a40ddfbf2a3a',
     },
     'React Testing Part 1' => {
       title: 'React Testing Part 1',
       description: 'React Testing Part 1',
       is_project: false,
-      url: '/javascript/react-js/react-testing-part-one.md',
+      url: '/javascript/react_js/react_testing_part_one.md',
       identifier_uuid: 'eb121904-73da-4e2a-9c54-d42bcd9f69a4',
     },
     'React Testing Part 2' => {
       title: 'React Testing Part 2',
       description: 'React Testing Part 2',
       is_project: false,
-      url: '/javascript/react-js/react-testing-part-two.md',
+      url: '/javascript/react_js/react_testing_part_two.md',
       identifier_uuid: 'cae4657e-6f16-4603-ab20-acc1a560cdab',
     }
   }