diff --git a/demos/includeDependencies.txt b/demos/includeDependencies.txt
index 374fd4c826d..54929e3c270 100644
--- a/demos/includeDependencies.txt
+++ b/demos/includeDependencies.txt
@@ -1,4 +1,9 @@
 d3
+highlight.js/lib/languages/css
+highlight.js/lib/languages/javascript
+highlight.js/lib/languages/typescript
+highlight.js/lib/languages/xml
+highlight.js/lib/core
 linkifyjs
 lowlight
 lowlight/lib/core
diff --git a/demos/src/Examples/CodeBlockLanguage/React/index.spec.js b/demos/src/Examples/CodeBlockLanguage/React/index.spec.js
index 5e819af7da0..3fddcb186d8 100644
--- a/demos/src/Examples/CodeBlockLanguage/React/index.spec.js
+++ b/demos/src/Examples/CodeBlockLanguage/React/index.spec.js
@@ -15,6 +15,7 @@ context('/src/Examples/CodeBlockLanguage/React/', () => {
 
       expect(initialCount).to.be.greaterThan(0)
 
+      cy.wait(100)
       cy.get('.tiptap select').select('java')
       cy.wait(500)
 
diff --git a/demos/src/Examples/CodeBlockLanguage/Vue/index.spec.js b/demos/src/Examples/CodeBlockLanguage/Vue/index.spec.js
index 68c0a104496..33ded87e1a1 100644
--- a/demos/src/Examples/CodeBlockLanguage/Vue/index.spec.js
+++ b/demos/src/Examples/CodeBlockLanguage/Vue/index.spec.js
@@ -15,6 +15,7 @@ context('/src/Examples/CodeBlockLanguage/Vue/', () => {
 
       expect(initialCount).to.be.greaterThan(0)
 
+      cy.wait(100)
       cy.get('.tiptap select').select('java')
       cy.wait(500)