See resque/redis-namespace#56

Author: francois-ferrandis

spec/rails_helper.rb

@@ -111,7 +111,7 @@
     ActionMailer::Base.deliveries.clear
     FactoryBot.rewind_sequences
     Rails.cache.clear
-    Redis.with_connection(&:flushall) # clears custom redis usages
+    Redis.with_connection { |redis| redis.del(redis.keys("*")) } # clears custom redis usages
     Warden.test_reset!
     WebMock.reset!
   end