diff --git a/tests/scripts/all.sh b/tests/scripts/all.sh
index 2a4bf8b..284ea1f 100755
--- a/tests/scripts/all.sh
+++ b/tests/scripts/all.sh
@@ -1579,7 +1579,7 @@
 component_build_arm_none_eabi_gcc () {
     msg "build: ${ARM_NONE_EABI_GCC_PREFIX}gcc, make" # ~ 10s
     scripts/config.py baremetal
-    make CC="${ARM_NONE_EABI_GCC_PREFIX}gcc" AR="${ARM_NONE_EABI_GCC_PREFIX}ar" LD="${ARM_NONE_EABI_GCC_PREFIX}ld" CFLAGS='-Werror -Wall -Wextra' lib
+    make CC="${ARM_NONE_EABI_GCC_PREFIX}gcc" AR="${ARM_NONE_EABI_GCC_PREFIX}ar" LD="${ARM_NONE_EABI_GCC_PREFIX}ld" CFLAGS='-Werror -Wall -Wextra -O1' lib
 }
 
 component_build_arm_none_eabi_gcc_arm5vte () {