test_after_commit: Error after updating to 1.2.0

I just updated to v1.2.0 and I’m getting this error when I seed the database:

NoMethodError: undefined method `records' for #<ActiveRecord::ConnectionAdapters::NullTransaction:0x000000000a51c048>
/app/heroku/ruby/bundle/ruby/2.4.4/gems/test_after_commit-1.2.0/lib/test_after_commit/database_statements.rb:45:in `test_commit_records'
/app/heroku/ruby/bundle/ruby/2.4.4/gems/test_after_commit-1.2.0/lib/test_after_commit/database_statements.rb:29:in `transaction'

Any hints on why this is happening?