diff --git a/tests/gem5/configs/realview64-switcheroo-full.py b/tests/gem5/configs/realview64-switcheroo-full.py
index abc96f9ea2..020957875d 100644
--- a/tests/gem5/configs/realview64-switcheroo-full.py
+++ b/tests/gem5/configs/realview64-switcheroo-full.py
@@ -43,7 +43,7 @@ root = LinuxArmFSSwitcheroo(
         ArmAtomicSimpleCPU,
         ArmTimingSimpleCPU,
         ArmMinorCPU,
-        ArmDerivO3CPU,
+        ArmO3CPU,
     ),
 ).create_root()