diff --git a/ports/arm/atomport-tests.h b/ports/arm/atomport-tests.h
index 1c52be9..79865bb 100644
--- a/ports/arm/atomport-tests.h
+++ b/ports/arm/atomport-tests.h
@@ -33,12 +33,12 @@
 /* Include Atomthreads kernel API */
 #include "atom.h"
 
-/* Prerequisite for ATOMLOG() macro (via dbg_format_msg) */
-extern void dbg_format_msg (char *format, ...) ;
+/* Include printf for ATOMLOG() */
+#include <stdio.h>
 
 
 /* Logger macro for viewing test results */
-#define ATOMLOG     dbg_format_msg
+#define ATOMLOG     printf
 
 /*
  * String location macro: for platforms which need to place strings in
diff --git a/ports/arm/platforms/qemu_integratorcp/modules.c b/ports/arm/platforms/qemu_integratorcp/modules.c
index 0983b55..5ee8e05 100644
--- a/ports/arm/platforms/qemu_integratorcp/modules.c
+++ b/ports/arm/platforms/qemu_integratorcp/modules.c
@@ -48,28 +48,6 @@ ICP_PIC_T *   const board_pic     = (ICP_PIC_T*)BOARD_BASE_ADDRESS_PIC;
 #define TIMER0_CLOCK_SPEED     40000000
 
 
-/**
- * \b dbg_format_msg
- *
- * Same as printf. 
- *
- */
-void 
-dbg_format_msg (char *format, ...)
-{
-    va_list         args;
-    static char     msg[256] ;
-    CRITICAL_STORE ;
-
-    va_start (args, format) ;
-    CRITICAL_START() ;
-    vsnprintf ((char*)msg, 256, (char*)format, args) ;
-    printf (msg) ;
-    CRITICAL_END() ;
-
-}
-
-
 /**
  * \b _mainCRTStartup
  *
diff --git a/ports/arm/platforms/qemu_integratorcp/modules.h b/ports/arm/platforms/qemu_integratorcp/modules.h
index c3237e0..9672418 100644
--- a/ports/arm/platforms/qemu_integratorcp/modules.h
+++ b/ports/arm/platforms/qemu_integratorcp/modules.h
@@ -121,9 +121,6 @@ extern ICP_PIC_T*         const                board_pic ;
 
 /* Function prototypes */
 extern int              low_level_init (void) ;
-extern void             dbg_format_msg (char *format, ...)  ;
-
-#define DBG_MESSAGE(fmt_str)    {  dbg_format_msg fmt_str  ; }
 
 
 #endif /* __MODULES_H__ */
diff --git a/tests/stress1.c b/tests/stress1.c
index c27b01e..f16827c 100644
--- a/tests/stress1.c
+++ b/tests/stress1.c
@@ -75,13 +75,13 @@ monitor_thread (uint32_t parm)
         uint32_t time = atomTimeGet() ;
 		
 		CRITICAL_START();
-		ATOMLOG (_STR("\r\nMonitor %d threads # %d (%08d)\r\n"), parm,  counter, (unsigned int)time) ;
+		ATOMLOG (_STR("\r\nMonitor %d threads # %d (%08d)\r\n"), (int)parm, counter, (unsigned int)time) ;
 		ATOMLOG (_STR("------------------------------\r\n")) ;
         //CRITICAL_END();
 
 		for (i=0; i<print_lines_count; i++) {
             //CRITICAL_START();
-            ATOMLOG (_STR("Thr %.2d cnt %08d\tThr %.2d cnt %08d\tThr %.2d cnt %08d\tThr %.2d cnt %08d\r\n"),
+            ATOMLOG (_STR("Thr %.2d cnt %08d\tThr %.2lu cnt %08d\tThr %.2lu cnt %08d\tThr %.2lu cnt %08d\r\n"),
                         i,test_counter[i],
                         i+print_lines_count,test_counter[i+print_lines_count],
                         i+print_lines_count*2,test_counter[i+print_lines_count*2],
@@ -127,7 +127,7 @@ uint32_t test_start (void)
 
 	for (i=0; i< TEST_THREADS;i++) {
         CRITICAL_START();
-        ATOMLOG (_STR("stress_test_thread %.3d creating...\r\n"), i) ;
+        ATOMLOG (_STR("stress_test_thread %.3d creating...\r\n"), (int)i) ;
         CRITICAL_END();
 		if (atomThreadCreate ((ATOM_TCB *)&test_tcb[i], test_prio[i], stress_test_thread, i, 
                     &stress_test_stack[i][0], TEST_STACK_BYTE_SIZE, TRUE) != ATOM_OK) {
@@ -159,7 +159,7 @@ atomthreads_stress_test (uint32_t thread_count)
         thread_count = MAX_TEST_THREADS ;
     }
 
-	ATOMLOG (_STR("\r\natomthreads_stress_test %.3d threads\r\n"), thread_count) ;
+	ATOMLOG (_STR("\r\natomthreads_stress_test %.3d threads\r\n"), (int)thread_count) ;
 	ATOMLOG (_STR("-----------------------------------\r\n")) ;