fix test and make comment more specific

Author: sleepyStick

test/asynchronous/test_transactions.py

@@ -651,7 +651,7 @@ async def callback(session):
             await s.with_transaction(callback)
 
         end = time.monotonic()
-        self.assertLess(end - start, 5)  # sum of backoffs is ~3.5 seconds
+        self.assertLess(end - start, 3.5)  # sum of 30 backoffs are 3.5629515313825695
 
     @async_client_context.require_test_commands
     @async_client_context.require_transactions
@@ -691,7 +691,7 @@ async def callback(session):
             await s.with_transaction(callback)
 
         end = time.monotonic()
-        self.assertGreaterEqual(end - start, 3.5)  # sum of backoffs is 3.5629515313825695
+        self.assertGreaterEqual(end - start, 3.5)  # sum of 30 backoffs are 3.5629515313825695
 
         random.random = _original_random_random
 

test/test_transactions.py

@@ -637,7 +637,7 @@ def callback(session):
             s.with_transaction(callback)
 
         end = time.monotonic()
-        self.assertLess(end - start, 5)  # sum of backoffs is ~3.5 seconds
+        self.assertLess(end - start, 3.5)  # sum of 30 backoffs are 3.5629515313825695
 
     @client_context.require_test_commands
     @client_context.require_transactions
@@ -675,7 +675,7 @@ def callback(session):
             s.with_transaction(callback)
 
         end = time.monotonic()
-        self.assertGreaterEqual(end - start, 3.5)  # sum of backoffs is 3.5629515313825695
+        self.assertGreaterEqual(end - start, 3.5)  # sum of 30 backoffs are 3.5629515313825695
 
         random.random = _original_random_random