diff --git a/frozen/Adafruit_CircuitPython_BusDevice b/frozen/Adafruit_CircuitPython_BusDevice
index 0791964147..d86fc7e81d 160000
--- a/frozen/Adafruit_CircuitPython_BusDevice
+++ b/frozen/Adafruit_CircuitPython_BusDevice
@@ -1 +1 @@
-Subproject commit 07919641470edb602585c6a91f7b8eacf17e664b
+Subproject commit d86fc7e81d51465ca1eae6f8c1141f81f065f5aa
diff --git a/frozen/Adafruit_CircuitPython_CircuitPlayground b/frozen/Adafruit_CircuitPython_CircuitPlayground
index d0aa6dc56d..f4ee725fb9 160000
--- a/frozen/Adafruit_CircuitPython_CircuitPlayground
+++ b/frozen/Adafruit_CircuitPython_CircuitPlayground
@@ -1 +1 @@
-Subproject commit d0aa6dc56d66decfae92daced7384c1e3518a666
+Subproject commit f4ee725fb93fd1a31666d3f71d10c94eb96df7c8
diff --git a/frozen/Adafruit_CircuitPython_Crickit b/frozen/Adafruit_CircuitPython_Crickit
index 44f52c5dac..412392c8bd 160000
--- a/frozen/Adafruit_CircuitPython_Crickit
+++ b/frozen/Adafruit_CircuitPython_Crickit
@@ -1 +1 @@
-Subproject commit 44f52c5dacd9fc605565e5794e95c9a785aaf693
+Subproject commit 412392c8bdb6b4378e007eb7974c76b92fa9ff1d
diff --git a/frozen/Adafruit_CircuitPython_DotStar b/frozen/Adafruit_CircuitPython_DotStar
index af25424ee7..03c24157d4 160000
--- a/frozen/Adafruit_CircuitPython_DotStar
+++ b/frozen/Adafruit_CircuitPython_DotStar
@@ -1 +1 @@
-Subproject commit af25424ee7dbebea3e5d77390c017018ffa52d36
+Subproject commit 03c24157d46672c723021686f7a838cfeb2db2ba
diff --git a/frozen/Adafruit_CircuitPython_HID b/frozen/Adafruit_CircuitPython_HID
index 5c2f6ef1ed..f5e70e0925 160000
--- a/frozen/Adafruit_CircuitPython_HID
+++ b/frozen/Adafruit_CircuitPython_HID
@@ -1 +1 @@
-Subproject commit 5c2f6ef1ed80f24b6a3878067d40350d3725e198
+Subproject commit f5e70e09250f2a25ebb6487a30a763041644c5d3
diff --git a/frozen/Adafruit_CircuitPython_IRRemote b/frozen/Adafruit_CircuitPython_IRRemote
index c29e10b590..ec11164ec6 160000
--- a/frozen/Adafruit_CircuitPython_IRRemote
+++ b/frozen/Adafruit_CircuitPython_IRRemote
@@ -1 +1 @@
-Subproject commit c29e10b590efbdf06163897b49cd0c2bea82ad6e
+Subproject commit ec11164ec6682094a48d0f9848d2c4c89c08f3bc
diff --git a/frozen/Adafruit_CircuitPython_LIS3DH b/frozen/Adafruit_CircuitPython_LIS3DH
index c4152a0d87..6298cd3638 160000
--- a/frozen/Adafruit_CircuitPython_LIS3DH
+++ b/frozen/Adafruit_CircuitPython_LIS3DH
@@ -1 +1 @@
-Subproject commit c4152a0d87a04903ae0e612eb381af440c9e28b3
+Subproject commit 6298cd363811ad6ac10d4325c898be87a70d7bb2
diff --git a/frozen/Adafruit_CircuitPython_Motor b/frozen/Adafruit_CircuitPython_Motor
index e0b709f171..4421e79661 160000
--- a/frozen/Adafruit_CircuitPython_Motor
+++ b/frozen/Adafruit_CircuitPython_Motor
@@ -1 +1 @@
-Subproject commit e0b709f1710555da67705360870ba0d14ced7e06
+Subproject commit 4421e79661002ff8da6c0c4f22940ec843ee300b
diff --git a/frozen/Adafruit_CircuitPython_NeoPixel b/frozen/Adafruit_CircuitPython_NeoPixel
index e9f50cb667..72e8f3855e 160000
--- a/frozen/Adafruit_CircuitPython_NeoPixel
+++ b/frozen/Adafruit_CircuitPython_NeoPixel
@@ -1 +1 @@
-Subproject commit e9f50cb6678a1684591ee021b95a3c4b51786fee
+Subproject commit 72e8f3855ecd136641d536a49311c38ee4f76f33
diff --git a/frozen/Adafruit_CircuitPython_Thermistor b/frozen/Adafruit_CircuitPython_Thermistor
index 00f4ebca6c..eae584918e 160000
--- a/frozen/Adafruit_CircuitPython_Thermistor
+++ b/frozen/Adafruit_CircuitPython_Thermistor
@@ -1 +1 @@
-Subproject commit 00f4ebca6c740b76c1c464f83d514ac20b0600e1
+Subproject commit eae584918e72ff5fa323825470f276b31829ef9f
diff --git a/frozen/Adafruit_CircuitPython_seesaw b/frozen/Adafruit_CircuitPython_seesaw
index 340cd17fad..e3e3021d85 160000
--- a/frozen/Adafruit_CircuitPython_seesaw
+++ b/frozen/Adafruit_CircuitPython_seesaw
@@ -1 +1 @@
-Subproject commit 340cd17fad0c29d3a70d6e298a30ecc753df054e
+Subproject commit e3e3021d8578fde450511b47a085d9d56ab46741
diff --git a/main.c b/main.c
index cbc0b093c3..2484d3f1fe 100644
--- a/main.c
+++ b/main.c
@@ -92,9 +92,10 @@ void reset_mp(void) {
     mp_obj_list_init(mp_sys_path, 0);
     mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR_)); // current dir (or base dir of the script)
     mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR__slash_));
-    mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR__slash_lib));
     // Frozen modules are in their own pseudo-dir, e.g., ".frozen".
+    // Prioritize .frozen over /lib.
     mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_FROZEN_FAKE_DIR_QSTR));
+    mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR__slash_lib));
 
     mp_obj_list_init(mp_sys_argv, 0);
 }
diff --git a/ports/atmel-samd/boards/pirkey_m0/mpconfigboard.mk b/ports/atmel-samd/boards/pirkey_m0/mpconfigboard.mk
index 0f8d0f9ca4..ddc262a570 100644
--- a/ports/atmel-samd/boards/pirkey_m0/mpconfigboard.mk
+++ b/ports/atmel-samd/boards/pirkey_m0/mpconfigboard.mk
@@ -10,6 +10,8 @@ LONGINT_IMPL = NONE
 CHIP_VARIANT = SAMD21E18A
 CHIP_FAMILY = samd21
 
+CFLAGS_INLINE_LIMIT = 45
+
 # Include these Python libraries in firmware.
 FROZEN_MPY_DIRS += $(TOP)/frozen/Adafruit_CircuitPython_DotStar
 FROZEN_MPY_DIRS += $(TOP)/frozen/Adafruit_CircuitPython_HID
diff --git a/ports/esp8266/main.c b/ports/esp8266/main.c
index c590ab59eb..dda17bb379 100644
--- a/ports/esp8266/main.c
+++ b/ports/esp8266/main.c
@@ -95,10 +95,11 @@ STATIC void mp_reset(void) {
     mp_init();
     mp_obj_list_init(mp_sys_path, 0);
     mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR_)); // current dir (or base dir of the script)
-    mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR__slash_lib));
     mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR__slash_));
     // Frozen modules are in their own pseudo-dir, e.g., ".frozen".
+    // Prioritize .frozen over /lib.
     mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_FROZEN_FAKE_DIR_QSTR));
+    mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR__slash_lib));
 
     mp_obj_list_init(mp_sys_argv, 0);
 
diff --git a/tools/preprocess_frozen_modules.py b/tools/preprocess_frozen_modules.py
index d157deeee9..f2b59ffc0f 100755
--- a/tools/preprocess_frozen_modules.py
+++ b/tools/preprocess_frozen_modules.py
@@ -33,7 +33,7 @@ def copy_and_process(in_dir, out_dir):
     for root, subdirs, files in os.walk(in_dir):
 
         # Skip library examples directories.
-        if Path(root).name in ['examples', 'docs']:
+        if Path(root).name in ['examples', 'tests', 'docs']:
             continue
 
         for file in files: