diff --git a/packages/bun-types/test.d.ts b/packages/bun-types/test.d.ts
index 7692df3f77..c02e72f1d7 100644
--- a/packages/bun-types/test.d.ts
+++ b/packages/bun-types/test.d.ts
@@ -1184,14 +1184,6 @@ declare module "bun:test" {
      * expect(null).toBeInstanceOf(Array); // fail
      */
     toBeInstanceOf(value: unknown): void;
-    /**
-     * Asserts that the expected value is an instance of value
-     *
-     * @example
-     * expect([]).toBeInstanceOf(Array);
-     * expect(null).toBeInstanceOf(Array); // fail
-     */
-    toBeInstanceOf(value: unknown): void;
     /**
      * Asserts that a value is `undefined`.
      *