diff --git a/packages/nuxt/src/components/islandsTransform.ts b/packages/nuxt/src/components/islandsTransform.ts
index e10f1cd957..d583e3425d 100644
--- a/packages/nuxt/src/components/islandsTransform.ts
+++ b/packages/nuxt/src/components/islandsTransform.ts
@@ -24,7 +24,7 @@ interface ComponentChunkOptions {
   buildDir: string
 }
 
-const SCRIPT_RE = /<script[^>]*>/g
+const SCRIPT_RE = /<script[^>]*>/gi
 const HAS_SLOT_OR_CLIENT_RE = /<slot[^>]*>|nuxt-client/
 const TEMPLATE_RE = /<template>([\s\S]*)<\/template>/
 const NUXTCLIENT_ATTR_RE = /\s:?nuxt-client(="[^"]*")?/g
diff --git a/packages/vite/src/plugins/composable-keys.ts b/packages/vite/src/plugins/composable-keys.ts
index 0b6e897f15..7e252f6ac0 100644
--- a/packages/vite/src/plugins/composable-keys.ts
+++ b/packages/vite/src/plugins/composable-keys.ts
@@ -43,7 +43,7 @@ export const composableKeysPlugin = createUnplugin((options: ComposableKeysOptio
     },
     transform (code, id) {
       if (!KEYED_FUNCTIONS_RE.test(code)) { return }
-      const { 0: script = code, index: codeIndex = 0 } = code.match(/(?<=<script[^>]*>)[\s\S]*?(?=<\/script>)/) || { index: 0, 0: code }
+      const { 0: script = code, index: codeIndex = 0 } = code.match(/(?<=<script[^>]*>)[\s\S]*?(?=<\/script>)/i) || { index: 0, 0: code }
       const s = new MagicString(code)
       // https://github.com/unjs/unplugin/issues/90
       let imports: Set<string> | undefined
diff --git a/test/basic.test.ts b/test/basic.test.ts
index fb68b45020..a09ae8de8f 100644
--- a/test/basic.test.ts
+++ b/test/basic.test.ts
@@ -699,8 +699,8 @@ describe('nuxt composables', () => {
     expect(id1).toBeTruthy()
     const matches = [
       html.match(/<script[^>]*>\(\(\)=>\{console.log\(window\)\}\)\(\)<\/script>/),
-      html.match(new RegExp(`<script[^>]*>document.querySelectorAll\\('\\[data-prehydrate-id\\*=":${id1}:"]'\\).forEach\\(o=>{console.log\\(o.outerHTML\\)}\\)</script>`)),
-      html.match(new RegExp(`<script[^>]*>document.querySelectorAll\\('\\[data-prehydrate-id\\*=":${id2}:"]'\\).forEach\\(o=>{console.log\\("other",o.outerHTML\\)}\\)</script>`)),
+      html.match(new RegExp(`<script[^>]*>document.querySelectorAll\\('\\[data-prehydrate-id\\*=":${id1}:"]'\\).forEach\\(o=>{console.log\\(o.outerHTML\\)}\\)</script>`, 'i')),
+      html.match(new RegExp(`<script[^>]*>document.querySelectorAll\\('\\[data-prehydrate-id\\*=":${id2}:"]'\\).forEach\\(o=>{console.log\\("other",o.outerHTML\\)}\\)</script>`, 'i')),
     ]
 
     // This tests we inject all scripts correctly, and only have one occurrence of multiple calls of a composable