diff --git a/tests/tests/cpld_control_pdlib_p8 b/tests/tests/cpld_control_pdlib_p8
index 0df03ff578..7c12d487fa 100644
--- a/tests/tests/cpld_control_pdlib_p8
+++ b/tests/tests/cpld_control_pdlib_p8
@@ -108,6 +108,9 @@ export FV3_RUN=cpld_control_run.IN
 if [[ $MACHINE_ID = hera ]] && [[ $RT_COMPILER = gnu ]]; then
   WLCLK=40
 fi
+if [[ $MACHINE_ID = hercules && $RT_COMPILER = gnu ]]; then
+ export WW3_PIO_REARR='box'
+fi
 
 export DT_INNER=720
 export DT_ATMOS=720
diff --git a/tests/tests/cpld_debug_pdlib_p8 b/tests/tests/cpld_debug_pdlib_p8
index 8d664e5929..82e9175328 100644
--- a/tests/tests/cpld_debug_pdlib_p8
+++ b/tests/tests/cpld_debug_pdlib_p8
@@ -111,6 +111,9 @@ fi
 if [[ $MACHINE_ID = gaea ]] && [[ $RT_COMPILER = intelllvm ]]; then
   WLCLK=50
 fi
+if [[ $MACHINE_ID = hercules && $RT_COMPILER = gnu ]]; then
+ export WW3_PIO_REARR='box'
+fi
 
 export K_SPLIT=2
 export N_SPLIT=5