I like naming my tests with the pattern:
MethodBeingTested_State_Result
MethodBeingTested_State_Result
Something like:
GetChangedClaims_CreateSeperateClaims_ClaimsCombined
GetChangedClaims_CreateSeperateClaims_ClaimsCombined
This makes it more obvious what the tests are performing, other.
Other than the other comments, the code looks fine.