The Home Office provide a list of Secure English Language Tests that have been assessed as meeting the Home Office’s strict English Language Test requirements for spouses, civil partners, unmarried partners, same sex partners, fiancé(e)s and proposed civil partners.
For those who are not from an approved English speaking country they must have some form of qualification or English test to satisfy this requirement. The test must be taken at one of the new approved Secure English Test Centres to meet the English language Test requirements. Here is a list of ways you can met this English Test requirement.
If you satisfy the above criteria then you will meet the English language test requirement for your spouse or partner visa. There are other factors such as how long ago you took the test and higher test requirements are needed for your ILR application later on. For this reason if you can take a test at a higher level than A1 such as B1 it avoids you having to take another test before the end of your 5 years when you begin to apply for your permanent Residence (ILR).