diff --git a/cpu/esp8266/startup.c b/cpu/esp8266/startup.c
index e85a197e09..e74a00195b 100644
--- a/cpu/esp8266/startup.c
+++ b/cpu/esp8266/startup.c
@@ -56,6 +56,7 @@ void esp_riot_init(void)
     extern uint8_t _rtc_bss_start, _rtc_bss_end;
     esp_reset_reason_t reset_reason = esp_reset_reason();
     if (reset_reason != ESP_RST_DEEPSLEEP && reset_reason != ESP_RST_SW) {
+        /* cppcheck-suppress comparePointers */
         memset(&_rtc_bss_start, 0, (&_rtc_bss_end - &_rtc_bss_start));
     }
 
diff --git a/cpu/esp_common/syscalls.c b/cpu/esp_common/syscalls.c
index ea42a718b7..57251a28bd 100644
--- a/cpu/esp_common/syscalls.c
+++ b/cpu/esp_common/syscalls.c
@@ -97,6 +97,7 @@ void IRAM_ATTR _lock_init(_lock_t *lock)
         memset(mtx, 0, sizeof(mutex_t));
         *lock = (_lock_t)mtx;
     }
+    /* cppcheck-suppress memleak; mtx is stored in lock */
 }
 
 void IRAM_ATTR _lock_init_recursive(_lock_t *lock)
@@ -128,6 +129,7 @@ void IRAM_ATTR _lock_init_recursive(_lock_t *lock)
         memset(rmtx, 0, sizeof(rmutex_t));
         *lock = (_lock_t)rmtx;
     }
+    /* cppcheck-suppress memleak; rmtx is stored in lock */
 }
 
 void IRAM_ATTR _lock_close(_lock_t *lock)
@@ -257,7 +259,7 @@ void IRAM_ATTR _lock_release_recursive(_lock_t *lock)
 #ifdef MODULE_ESP_IDF_HEAP
 
 #define heap_caps_malloc_default(s)         heap_caps_malloc(s, MALLOC_CAP_DEFAULT)
-#define heap_caps_realloc_default(p,s)      heap_caps_realloc(p, s, MALLOC_CAP_DEFAULT)
+#define heap_caps_realloc_default(p, s)     heap_caps_realloc(p, s, MALLOC_CAP_DEFAULT)
 
 void* IRAM_ATTR __wrap__malloc_r(struct _reent *r, size_t size)
 {
@@ -362,6 +364,7 @@ extern uint8_t _eheap3;
 unsigned int IRAM_ATTR get_free_heap_size(void)
 {
     struct mallinfo minfo = mallinfo();
+    /* cppcheck-suppress comparePointers */
     unsigned int heap_size = &_eheap - &_sheap;
 #if NUM_HEAPS > 1
     heap_size += &_eheap1 - &_sheap1;
diff --git a/cpu/esp_common/thread_arch.c b/cpu/esp_common/thread_arch.c
index 10cf207a3e..90a67768fc 100644
--- a/cpu/esp_common/thread_arch.c
+++ b/cpu/esp_common/thread_arch.c
@@ -352,6 +352,7 @@ void thread_isr_stack_init(void)
     uintptr_t *stackmax = (uintptr_t *)(uintptr_t)sp;
     uintptr_t *stackp = (uintptr_t *)(uintptr_t)&port_IntStack;
 
+    /* cppcheck-suppress comparePointers */
     while (stackp < stackmax) {
         *stackp = (uintptr_t) stackp;
         stackp++;