Taken this from Joppa's answer on 8th January 2016.
You can still use paragraph 32D provision in FT-SE to submit your previous test certificate result for your next application:
Quote:
32D. If an applicant applying for limited leave to enter or remain under Part 8 or Appendix FM submits an English language test certificate or result and the Home Office has already accepted it as part of a successful previous partner or parent application (but not where the application was refused, even if on grounds other than the English language requirement), the decision-maker may accept that certificate or result as valid if it is: (a) from a provider which is no longer approved, or
(b) from a provider who remains approved but the test the applicant has taken with that provider is no longer approved, or
(c) from a test centre which is no longer approved, or
(d) past its validity date (if a validity date is required under Appendix O), provided that when the subsequent application is made: (i) the applicant has had continuous leave (disregarding any period of overstaying of no more than 28 days) as a partner or parent since the Home Office accepted the test certificate as valid; and
(ii) the award to the applicant does not fall within the circumstances set out in paragraph 32B of this Appendix.
https://www.gov.uk/guidance/immigra...endix-fm-se-family-members-specified-evidence