diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index a668f249..75950cab 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -36,7 +36,7 @@ jobs:
         working-directory: ./packages/svelte-lexical
       - run: pnpm build
         working-directory: ./packages/svelte-lexical
-      - run: pnpm svelte-check
+      - run: pnpm check
         working-directory: ./packages/svelte-lexical
       - run: pnpm lint
         working-directory: ./packages/svelte-lexical
@@ -45,7 +45,7 @@ jobs:
         working-directory: ./demos/playground
       - run: pnpm build
         working-directory: ./demos/playground
-      - run: pnpm svelte-check
+      - run: pnpm check
         working-directory: ./demos/playground
       - run: pnpm lint
         working-directory: ./demos/playground
@@ -56,7 +56,7 @@ jobs:
         working-directory: ./demos/sveltekit
       - run: pnpm build
         working-directory: ./demos/sveltekit
-      - run: pnpm svelte-check
+      - run: pnpm check
         working-directory: ./demos/sveltekit
       - run: pnpm lint
         working-directory: ./demos/sveltekit
@@ -65,7 +65,7 @@ jobs:
         working-directory: ./demos/richtext-editor
       - run: pnpm build
         working-directory: ./demos/richtext-editor
-      - run: pnpm svelte-check
+      - run: pnpm check
         working-directory: ./demos/richtext-editor
       - run: pnpm lint
         working-directory: ./demos/richtext-editor
@@ -76,7 +76,7 @@ jobs:
         working-directory: ./demos/plaintext-editor
       - run: pnpm build
         working-directory: ./demos/plaintext-editor
-      - run: pnpm svelte-check
+      - run: pnpm check
         working-directory: ./demos/plaintext-editor
       - run: pnpm lint
         working-directory: ./demos/plaintext-editor
diff --git a/demos/plaintext-editor/package.json b/demos/plaintext-editor/package.json
index 27183b3b..38f77fc4 100644
--- a/demos/plaintext-editor/package.json
+++ b/demos/plaintext-editor/package.json
@@ -8,7 +8,8 @@
     "build": "vite build",
     "preview": "vite preview",
     "lint": "eslint .",
-    "size": "pnpm build && size-limit"
+    "size": "pnpm build && size-limit",
+    "check": "svelte-check --tsconfig ./tsconfig.json --fail-on-warnings"
   },
   "devDependencies": {
     "@size-limit/preset-app": "^8.2.6",
diff --git a/demos/plaintext-editor/src/PlainTextComposer.svelte b/demos/plaintext-editor/src/PlainTextComposer.svelte
index 372421f6..c0030b59 100644
--- a/demos/plaintext-editor/src/PlainTextComposer.svelte
+++ b/demos/plaintext-editor/src/PlainTextComposer.svelte
@@ -10,6 +10,7 @@
 
   const initialConfig = {
     theme: PlaygroundEditorTheme,
+    namespace: 'Playground',
     nodes: [],
     onError: (error) => {
       throw error;
diff --git a/demos/richtext-editor/package.json b/demos/richtext-editor/package.json
index 497f0fab..9177811f 100644
--- a/demos/richtext-editor/package.json
+++ b/demos/richtext-editor/package.json
@@ -9,7 +9,7 @@
     "preview": "vite preview",
     "lint": "eslint .",
     "size": "pnpm build && size-limit",
-    "svelte-check": "svelte-check --fail-on-warnings"
+    "check": "svelte-check --fail-on-warnings"
   },
   "devDependencies": {
     "@size-limit/preset-app": "^8.2.6",
diff --git a/demos/sveltekit/package.json b/demos/sveltekit/package.json
index abda9841..255bff78 100644
--- a/demos/sveltekit/package.json
+++ b/demos/sveltekit/package.json
@@ -6,7 +6,8 @@
     "dev": "vite dev",
     "build": "vite build",
     "preview": "vite preview",
-    "lint": "eslint ."
+    "lint": "eslint .",
+    "check": "svelte-check --fail-on-warnings"
   },
   "devDependencies": {
     "@sveltejs/adapter-auto": "^2.0.1",