// only be one decrement regardless of the number of failures.
func TestTransportDecrementConnWhenIdleConnRemoved(t *testing.T) {
	run(t, testTransportDecrementConnWhenIdleConnRemoved, []testMode{http2Mode})
}
func testTransportDecrementConnWhenIdleConnRemoved(t *testing.T, mode testMode) {
	CondSkipHTTP2(t)

	h := HandlerFunc(func(w ResponseWriter, r *Request) {