diff --git a/tb/eth_axis_rx/test_eth_axis_rx.py b/tb/eth_axis_rx/test_eth_axis_rx.py
index d31e4f248..e474011cc 100644
--- a/tb/eth_axis_rx/test_eth_axis_rx.py
+++ b/tb/eth_axis_rx/test_eth_axis_rx.py
@@ -136,7 +136,7 @@ def cycle_pause():
 
 
 def size_list():
-    return list(range(1, 128)) + [512, 1514, 9214] + [60]*10
+    return list(range(1, 128)) + [512, 1500, 9200] + [60-14]*10
 
 
 def incrementing_payload(length):
diff --git a/tb/eth_axis_tx/test_eth_axis_tx.py b/tb/eth_axis_tx/test_eth_axis_tx.py
index 8a2358c35..7e3512b06 100644
--- a/tb/eth_axis_tx/test_eth_axis_tx.py
+++ b/tb/eth_axis_tx/test_eth_axis_tx.py
@@ -134,7 +134,7 @@ def cycle_pause():
 
 
 def size_list():
-    return list(range(1, 128)) + [512, 1514, 9214] + [60]*10
+    return list(range(1, 128)) + [512, 1500, 9200] + [60-14]*10
 
 
 def incrementing_payload(length):