diff --git a/test/functional/api/cas/cache_config.py b/test/functional/api/cas/cache_config.py
index 6c0181b..5555a57 100644
--- a/test/functional/api/cas/cache_config.py
+++ b/test/functional/api/cas/cache_config.py
@@ -71,7 +71,7 @@ class CacheStatus(Enum):
 
 class Time(timedelta):
     def total_milliseconds(self):
-        return self.total_seconds() * 1000
+        return int(self.total_seconds() * 1000)
 
 
 class FlushParametersAlru: