diff --git a/config/examples/lpc55s69-tz.config b/config/examples/lpc55s69-tz.config
index ce4b1df3..19b47cc7 100644
--- a/config/examples/lpc55s69-tz.config
+++ b/config/examples/lpc55s69-tz.config
@@ -31,10 +31,11 @@ FLASH_MULTI_SECTOR_ERASE?=1
 WOLFCRYPT_TZ?=1
 WOLFCRYPT_TZ_PKCS11?=1
 
-# 1024-byte sector to accomodate RSA4096
-WOLFBOOT_SECTOR_SIZE?=0x400
+# use 1024-byte sector to accomodate RSA4096 signature
+# WOLFBOOT_SECTOR_SIZE?=0x400
+WOLFBOOT_SECTOR_SIZE?=0x200
 
-# 200KB boot, 80KB keyvault, 8KB NSC, 56KB partitions, 1024 swap
+# 200KB boot, 80KB keyvault, 8KB NSC, 56KB partitions, 512/1024 swap
 WOLFBOOT_KEYVAULT_ADDRESS?=0x10032000
 WOLFBOOT_KEYVAULT_SIZE?=0x14000
 WOLFBOOT_NSC_ADDRESS?=0x10046000
diff --git a/config/examples/lpc55s69.config b/config/examples/lpc55s69.config
index b1446e41..87877738 100644
--- a/config/examples/lpc55s69.config
+++ b/config/examples/lpc55s69.config
@@ -29,21 +29,22 @@ DUALBANK_SWAP?=0
 PKA?=1
 FLASH_MULTI_SECTOR_ERASE?=1
 
-# 1024-byte sector to accomodate RSA4096
-WOLFBOOT_SECTOR_SIZE?=0x400
+# use 1024-byte sector to accomodate RSA4096 signature
+# WOLFBOOT_SECTOR_SIZE?=0x400
+WOLFBOOT_SECTOR_SIZE?=0x200
 
 # Default configuration
-# 40KB boot, 44KB partitions, 1024 swap
-#WOLFBOOT_PARTITION_SIZE?=0xB000
-#WOLFBOOT_PARTITION_BOOT_ADDRESS?=0xD000
-#WOLFBOOT_PARTITION_UPDATE_ADDRESS?=0x18000
-#WOLFBOOT_PARTITION_SWAP_ADDRESS?=0x23000
+# 44KB boot, 52KB partitions, 512/1024 swap
+WOLFBOOT_PARTITION_SIZE?=0xB000
+WOLFBOOT_PARTITION_BOOT_ADDRESS?=0xD000
+WOLFBOOT_PARTITION_UPDATE_ADDRESS?=0x18000
+WOLFBOOT_PARTITION_SWAP_ADDRESS?=0x23000
 
 # use these for test/benchmark
-WOLFBOOT_PARTITION_SIZE?=0x26000
-WOLFBOOT_PARTITION_BOOT_ADDRESS?=0x10000
-WOLFBOOT_PARTITION_UPDATE_ADDRESS?=0x36000
-WOLFBOOT_PARTITION_SWAP_ADDRESS?=0x5C000
+#WOLFBOOT_PARTITION_SIZE?=0x2b000
+#WOLFBOOT_PARTITION_BOOT_ADDRESS?=0x10000
+#WOLFBOOT_PARTITION_UPDATE_ADDRESS?=0x3b000
+#WOLFBOOT_PARTITION_SWAP_ADDRESS?=0x66000
 
-WOLFCRYPT_TEST?=1
-WOLFCRYPT_BENCHMARK?=1
+#WOLFCRYPT_TEST?=1
+#WOLFCRYPT_BENCHMARK?=1
diff --git a/include/user_settings.h b/include/user_settings.h
index 56715fec..aee60869 100644
--- a/include/user_settings.h
+++ b/include/user_settings.h
@@ -505,13 +505,17 @@ extern int tolower(int c);
             #define CUSTOM_RAND_GENERATE_BLOCK my_rng_seed_gen
             extern int my_rng_seed_gen(unsigned char* output, unsigned int sz);
         #endif
-            
+
         #define HAVE_AESGCM
         #define GCM_TABLE
-        #define HAVE_AES_ECB
-        #define WOLFSSL_AES_OFB
-        #define WOLFSSL_AES_CFB
-        #define WOLFSSL_AES_COUNTER
+
+        #if defined(WOLFSSL_NXP_LPC55S69) || defined(WOLFSSL_NXP_LPC55S69_NO_HWACCEL)
+            #define HAVE_AES_ECB
+            #define WOLFSSL_AES_OFB
+            #define WOLFSSL_AES_CFB
+            #define WOLFSSL_AES_COUNTER
+            #define WOLFSSL_STATIC_MEMORY_TEST_SZ (30 * 1024)
+        #endif
     #else
         #define HAVE_HASHDRBG
         #define WOLFSSL_AES_CFB
diff --git a/test-app/ARM-lpc55s69.ld b/test-app/ARM-lpc55s69.ld
index 959c5699..078c125e 100644
--- a/test-app/ARM-lpc55s69.ld
+++ b/test-app/ARM-lpc55s69.ld
@@ -1,10 +1,10 @@
-_Min_Heap_Size  = 0x00008000; /* minimal heap (not using malloc) */
+_Min_Heap_Size  = 0x00000100; /* minimal heap (not using malloc) */
 _Min_Stack_Size = 0x00008000; /* required amount of stack */
 
 MEMORY
 {
     FLASH (rx) : ORIGIN = @WOLFBOOT_TEST_APP_ADDRESS@, LENGTH = @WOLFBOOT_TEST_APP_SIZE@
-    RAM (rwx) : ORIGIN = 0x20020000, LENGTH = 96K
+    RAM (rwx) : ORIGIN = 0x20020000, LENGTH = 160K
 }
 
 SECTIONS
diff --git a/test-app/Makefile b/test-app/Makefile
index 3ef95a11..6c31ebc6 100644
--- a/test-app/Makefile
+++ b/test-app/Makefile
@@ -182,6 +182,9 @@ ifeq ($(WOLFCRYPT_SUPPORT),1)
   # Add SP C math (all architectures)
   APP_OBJS+=$(WOLFBOOT_LIB_WOLFSSL)/wolfcrypt/src/sp_c32.o
 
+  # Add RSA support (needed by test suite)
+  APP_OBJS+=$(WOLFBOOT_LIB_WOLFSSL)/wolfcrypt/src/rsa.o
+
   ifneq ($(NO_ASM),1)
     # SP Cortex M
     ifneq ($(filter ARM ARM_BE,$(ARCH)),)
@@ -738,10 +741,8 @@ ifeq ($(TARGET),lpc55s69)
     else
       CFLAGS+=-DWOLFSSL_NXP_LPC55S69_NO_HWACCEL
     endif
-    LIBS+=--specs=nano.specs
-    ifneq ($(WOLFCRYPT_SUPPORT),1)
-      # Only use nosys stubs when not providing our own syscalls
-      LDFLAGS+=--specs=nosys.specs
+    ifeq ($(WOLFCRYPT_SUPPORT),1)
+      LIBS+=--specs=nano.specs
     endif
     ifeq ($(WOLFCRYPT_BENCHMARK),1)
       # Benchmark needs float printf for results
diff --git a/test-app/app_lpc55s69.c b/test-app/app_lpc55s69.c
index 766d7ca5..c64df98b 100644
--- a/test-app/app_lpc55s69.c
+++ b/test-app/app_lpc55s69.c
@@ -133,9 +133,11 @@ void main(void)
     uint8_t boot_state, update_state;
 
     hal_init();
-    systick_init();
     leds_init();
+#ifndef TZEN
+    systick_init();
     __enable_irq();
+#endif
 
     wolfBoot_printf("\n==================================\n");
     wolfBoot_printf("LPC55S69 wolfBoot demo Application\n");
@@ -205,63 +207,69 @@ void main(void)
 }
 
 
-// #include "sys/stat.h"
-// int _getpid(void)
-// {
-//     return 1;
-// }
+#include "sys/stat.h"
+int WEAKFUNCTION _getpid(void)
+{
+    return 1;
+}
 
-// int _kill(int pid, int sig)
-// {
-//     (void)pid;
-//     (void)sig;
-//     return -1;
-// }
+int WEAKFUNCTION _kill(int pid, int sig)
+{
+    (void)pid;
+    (void)sig;
+    return -1;
+}
 
-// void _exit(int status)
-// {
-//     _kill(status, -1);
-//     while (1) {}
-// }
+void WEAKFUNCTION _exit(int status)
+{
+    _kill(status, -1);
+    while (1) {}
+}
 
-// int _read(int file, char *ptr, int len)
-// {
-//     (void)file;
-//     (void)ptr;
-//     (void)len;
-//     return -1;
-// }
+int WEAKFUNCTION _read(int file, char *ptr, int len)
+{
+    (void)file;
+    (void)ptr;
+    (void)len;
+    return -1;
+}
 
-// int _write(int file, char *ptr, int len)
-// {
-//     (void)file;
-//     (void)ptr;
-//     return len;
-// }
+int WEAKFUNCTION _write(int file, char *ptr, int len)
+{
+    (void)file;
+    (void)ptr;
+    return len;
+}
 
-// int _close(int file)
-// {
-//     (void)file;
-//     return -1;
-// }
+int WEAKFUNCTION _close(int file)
+{
+    (void)file;
+    return -1;
+}
 
-// int _isatty(int file)
-// {
-//     (void)file;
-//     return 1;
-// }
+int WEAKFUNCTION _isatty(int file)
+{
+    (void)file;
+    return 1;
+}
 
-// int _lseek(int file, int ptr, int dir)
-// {
-//     (void)file;
-//     (void)ptr;
-//     (void)dir;
-//     return 0;
-// }
+int WEAKFUNCTION _lseek(int file, int ptr, int dir)
+{
+    (void)file;
+    (void)ptr;
+    (void)dir;
+    return 0;
+}
 
-// int _fstat(int file, struct stat *st)
-// {
-//     (void)file;
-//     st->st_mode = S_IFCHR;
-//     return 0;
-// }
+int WEAKFUNCTION _fstat(int file, struct stat *st)
+{
+    (void)file;
+    st->st_mode = S_IFCHR;
+    return 0;
+}
+
+void WEAKFUNCTION *_sbrk(int incr)
+{
+    (void)incr;
+    return 0;
+}