diff --git a/src/core/client.test.ts b/src/core/client.test.ts
new file mode 100644
index 0000000..c6b21e8
--- /dev/null
+++ b/src/core/client.test.ts
@@ -0,0 +1,23 @@
+import { afterEach, describe, expect, it, vi } from 'vitest'
+import { PixelmuseClient } from './client.js'
+
+describe('PixelmuseClient', () => {
+  afterEach(() => {
+    vi.restoreAllMocks()
+  })
+
+  it('handles 204 delete responses without trying to parse JSON', async () => {
+    const fetchSpy = vi
+      .spyOn(globalThis, 'fetch')
+      .mockResolvedValue(new Response(null, { status: 204 }))
+
+    const client = new PixelmuseClient(`pm_live_${'a'.repeat(32)}`)
+
+    await expect(client.deleteGeneration('img_123')).resolves.toBeUndefined()
+    expect(fetchSpy).toHaveBeenCalledTimes(1)
+    expect(fetchSpy).toHaveBeenCalledWith(
+      'https://www.pixelmuse.studio/api/v1/images/img_123',
+      expect.objectContaining({ method: 'DELETE' }),
+    )
+  })
+})
diff --git a/src/core/client.ts b/src/core/client.ts
index f53afb6..a66b730 100644
--- a/src/core/client.ts
+++ b/src/core/client.ts
@@ -79,6 +79,10 @@ export class PixelmuseClient {
       )
     }
 
+    if (res.status === 204 || res.status === 205) {
+      return undefined as T
+    }
+
     return (await res.json()) as T
   }