diff --git a/tools/ci.sh b/tools/ci.sh
index 4490099b6b..345aea84a0 100755
--- a/tools/ci.sh
+++ b/tools/ci.sh
@@ -100,6 +100,7 @@ function ci_cc3200_build {
 # ports/esp32
 
 function ci_esp32_setup_helper {
+    pip3 install pyelftools
     git clone https://github.com/espressif/esp-idf.git
     git -C esp-idf checkout $1
     git -C esp-idf submodule update --init \
@@ -143,6 +144,9 @@ function ci_esp32_build {
     if [ -d $IDF_PATH/components/esp32s3 ]; then
         make ${MAKEOPTS} -C ports/esp32 BOARD=GENERIC_S3
     fi
+
+    # Test building native .mpy with xtensawin architecture.
+    ci_native_mpy_modules_build xtensawin
 }
 
 ########################################################################################
@@ -297,6 +301,7 @@ function ci_samd_build {
 
 function ci_stm32_setup {
     ci_gcc_arm_setup
+    pip3 install pyelftools
     pip3 install pyhy
 }
 
@@ -311,6 +316,10 @@ function ci_stm32_pyb_build {
     make ${MAKEOPTS} -C ports/stm32/mboot BOARD=PYBV10 CFLAGS_EXTRA='-DMBOOT_FSLOAD=1 -DMBOOT_VFS_LFS2=1'
     make ${MAKEOPTS} -C ports/stm32/mboot BOARD=PYBD_SF6
     make ${MAKEOPTS} -C ports/stm32/mboot BOARD=STM32F769DISC CFLAGS_EXTRA='-DMBOOT_ADDRESS_SPACE_64BIT=1 -DMBOOT_SDCARD_ADDR=0x100000000ULL -DMBOOT_SDCARD_BYTE_SIZE=0x400000000ULL -DMBOOT_FSLOAD=1 -DMBOOT_VFS_FAT=1'
+
+    # Test building native .mpy with armv7emsp architecture.
+    git submodule update --init lib/berkeley-db-1.xx
+    ci_native_mpy_modules_build armv7emsp
 }
 
 function ci_stm32_nucleo_build {