diff --git a/src/helper/websocket/index.test.ts b/src/helper/websocket/index.test.ts
index 0e767788..55e6879d 100644
--- a/src/helper/websocket/index.test.ts
+++ b/src/helper/websocket/index.test.ts
@@ -89,7 +89,7 @@ describe('WSContext', () => {
     expect(nullURLWS.url).toBeNull()
   })
   it('Should normalize message in send()', () => {
-    let data: string | ArrayBuffer | null = null
+    let data: string | ArrayBuffer | Uint8Array | null = null
     const wsContext = new WSContext({
       // eslint-disable-next-line @typescript-eslint/no-unused-vars
       send(received, _options) {
@@ -104,6 +104,6 @@ describe('WSContext', () => {
     expect(data).toBeInstanceOf(ArrayBuffer)
 
     wsContext.send(new Uint8Array(16))
-    expect(data).toBeInstanceOf(ArrayBuffer)
+    expect(data).toBeInstanceOf(Uint8Array)
   })
 })
diff --git a/src/helper/websocket/index.ts b/src/helper/websocket/index.ts
index e40baa2d..9976fe18 100644
--- a/src/helper/websocket/index.ts
+++ b/src/helper/websocket/index.ts
@@ -68,10 +68,7 @@ export class WSContext<T = unknown> {
     this.protocol = init.protocol ?? null
   }
   send(source: string | ArrayBuffer | Uint8Array, options?: SendOptions): void {
-    this.#init.send(
-      typeof source === 'string' ? source : source instanceof Uint8Array ? source.buffer : source,
-      options ?? {}
-    )
+    this.#init.send(source, options ?? {})
   }
   raw?: T
   binaryType: BinaryType = 'arraybuffer'