diff --git a/src/errors.ts b/src/errors.ts
index f096dec..e438a4b 100644
--- a/src/errors.ts
+++ b/src/errors.ts
@@ -1,6 +1,6 @@
 export class NotAMockFunctionError extends TypeError {
   constructor(value: unknown) {
-    super(`when() must be given a Vite mock, but received ${String(value)}`)
+    super(`when() must be given a Vitest mock, but received ${String(value)}`)
     this.name = 'NotAMockFunctionError'
   }
 }