diff --git a/tests/wally-riscv-arch-test/riscv-test-suite/rv32i_m/privilege/references/WALLY-uart-01.reference_output b/tests/wally-riscv-arch-test/riscv-test-suite/rv32i_m/privilege/references/WALLY-uart-01.reference_output
index f998d4660..e93b059a0 100644
--- a/tests/wally-riscv-arch-test/riscv-test-suite/rv32i_m/privilege/references/WALLY-uart-01.reference_output
+++ b/tests/wally-riscv-arch-test/riscv-test-suite/rv32i_m/privilege/references/WALLY-uart-01.reference_output
@@ -65,5 +65,5 @@ ffffffC1 # Threshold = 14
 0000C201
 00000061 # FIFO has data, no overrun
 00000006 # wait for interrupt
-000000A3 # FIFO overrun error
+ffffffA3 # FIFO overrun error
 0000000b # ecall from test termination