diff --git a/tests/lib/heap/prj.conf b/tests/lib/heap/prj.conf
index a41fd3e0788..dd9186e6a50 100644
--- a/tests/lib/heap/prj.conf
+++ b/tests/lib/heap/prj.conf
@@ -1,2 +1,3 @@
 CONFIG_ZTEST=y
 CONFIG_SYS_HEAP_VALIDATE=y
+CONFIG_SYS_HEAP_RUNTIME_STATS=y
diff --git a/tests/lib/heap/src/main.c b/tests/lib/heap/src/main.c
index 316f639d6cf..1851f236bf2 100644
--- a/tests/lib/heap/src/main.c
+++ b/tests/lib/heap/src/main.c
@@ -38,7 +38,16 @@
 
 #define BIG_HEAP_SZ MIN(256 * 1024, MEMSZ / 3)
 #define SMALL_HEAP_SZ MIN(BIG_HEAP_SZ, 2048)
+
+/* With enabling SYS_HEAP_RUNTIME_STATS, the size of struct z_heap
+ * will increase 16 bytes on 64 bit CPU.
+ */
+#ifdef CONFIG_SYS_HEAP_RUNTIME_STATS
+#define SOLO_FREE_HEADER_HEAP_SZ (80)
+#else
 #define SOLO_FREE_HEADER_HEAP_SZ (64)
+#endif
+
 #define SCRATCH_SZ (sizeof(heapmem) / 2)
 
 /* The test memory.  Make them pointer arrays for robust alignment
diff --git a/tests/lib/heap_align/prj.conf b/tests/lib/heap_align/prj.conf
index a41fd3e0788..dd9186e6a50 100644
--- a/tests/lib/heap_align/prj.conf
+++ b/tests/lib/heap_align/prj.conf
@@ -1,2 +1,3 @@
 CONFIG_ZTEST=y
 CONFIG_SYS_HEAP_VALIDATE=y
+CONFIG_SYS_HEAP_RUNTIME_STATS=y