diff --git a/components/heap/test_apps/heap_tests/main/test_malloc_caps.c b/components/heap/test_apps/heap_tests/main/test_malloc_caps.c
index b61e16d34ae..59a1b79f906 100644
--- a/components/heap/test_apps/heap_tests/main/test_malloc_caps.c
+++ b/components/heap/test_apps/heap_tests/main/test_malloc_caps.c
@@ -360,7 +360,6 @@ TEST_CASE("RTC memory should be lowest priority and its free size should be big
 {
     const size_t allocation_size = 1024 * 4;
     void *ptr = NULL;
-    size_t free_size = 0;
 
     ptr = heap_caps_malloc(allocation_size, MALLOC_CAP_DEFAULT);
     TEST_ASSERT_NOT_NULL(ptr);