req, gerr := newTestSignedRequestV4(http.MethodGet, u, 0, nil, testCase.accessKey, testCase.secretKey, nil)
		if gerr != nil {
			t.Fatalf("Test %d: %s: Failed to create HTTP request for ListMultipartUploadsHandler: <ERROR> %v", i+1, instanceType, gerr)
		}
		// Since `apiRouter` satisfies `http.Handler` it has a ServeHTTP to execute the logic of the handler.