Workaround for intermittently failing redis spec

spec/helpers/helper_spec.rb

@@ -304,12 +304,15 @@ RSpec.describe DiscourseChat::Manager do
   describe '.save_transcript' do
 
     it 'saves a transcript to redis' do
-      freeze_time
-      
       key = DiscourseChat::Helper.save_transcript("Some content here")
 
       expect($redis.get("chat_integration:transcript:#{key}")).to eq("Some content here")
-      expect($redis.pttl("chat_integration:transcript:#{key}")).to eq(3600*1000)
+      
+      ttl = $redis.pttl("chat_integration:transcript:#{key}")
+
+      # Slight hack since freeze_time doens't work on redis
+      expect($redis.pttl("chat_integration:transcript:#{key}")).to be <= (3601*1000)
+      expect($redis.pttl("chat_integration:transcript:#{key}")).to be >= (3599*1000)
     end
   end