diff -ruN pmdk/src/test/blk_rw/blk_rw.c pmdk-1.12.1/src/test/blk_rw/blk_rw.c
--- pmdk/src/test/blk_rw/blk_rw.c	2022-11-17 17:53:30.000000000 +0800
+++ pmdk-1.12.1/src/test/blk_rw/blk_rw.c	2022-12-04 20:47:41.633505093 +0800
@@ -63,7 +63,7 @@
 
 	const char *path = argv[2];
 
-	PMEMblkpool *handle;
+	PMEMblkpool *handle = NULL;
 	switch (*argv[3]) {
 		case 'c':
 			handle = pmemblk_create(path, Bsize, 0,
diff -ruN pmdk/src/test/obj_realloc/obj_realloc.c pmdk-1.12.1/src/test/obj_realloc/obj_realloc.c
--- pmdk/src/test/obj_realloc/obj_realloc.c	2022-11-17 17:53:31.000000000 +0800
+++ pmdk-1.12.1/src/test/obj_realloc/obj_realloc.c	2022-12-04 20:47:41.633505093 +0800
@@ -150,8 +150,8 @@
 
 	UT_ASSERT(usable_size_from >= size_from);
 
-	size_t check_size;
-	uint16_t checksum;
+	size_t check_size = 0;
+	uint16_t checksum = 0;
 
 	if (zrealloc) {
 		UT_ASSERT(util_is_zeroed(D_RO(D_RO(root)->obj),
diff -ruN pmdk/src/test/unittest/unittest.h pmdk-1.12.1/src/test/unittest/unittest.h
--- pmdk/src/test/unittest/unittest.h	2022-11-17 17:53:31.000000000 +0800
+++ pmdk-1.12.1/src/test/unittest/unittest.h	2022-12-04 20:47:41.633505093 +0800
@@ -102,6 +102,13 @@
 /* XXX - fix this temp hack dup'ing util_strerror when we get mock for win */
 void ut_strerror(int errnum, char *buff, size_t bufflen);
 
+int ut_snprintf(const char *file, int line, const char *func,
+		char *str, size_t size, const char *format, ...);
+
+#define SNPRINTF(str, size, format, ...) \
+     ut_snprintf(__FILE__, __LINE__, __func__, \
+		     str, size, format, __VA_ARGS__)
+
 /* XXX - eliminate duplicated definitions in unittest.h and util.h */
 #ifdef _WIN32
 static inline int ut_util_statW(const wchar_t *path,
diff -ruN pmdk/src/test/unittest/ut.c pmdk-1.12.1/src/test/unittest/ut.c
--- pmdk/src/test/unittest/ut.c	2022-11-17 17:53:31.000000000 +0800
+++ pmdk-1.12.1/src/test/unittest/ut.c	2022-12-04 20:47:41.633505093 +0800
@@ -1094,6 +1094,27 @@
 }
 #endif
 
+int
+ut_snprintf(const char *file, int line, const char *func,
+		               char *str, size_t size, const char *format, ...)
+	{
+             va_list ap;
+	     va_start(ap, format);
+	     int ret = vsnprintf(str, size, format, ap);
+	     va_end(ap);
+
+	     if (ret < 0) {
+		     if (!errno)
+		            errno = EIO;
+	             ut_fatal(file, line, func, "!snprintf");
+		     } else if ((size_t)ret >= size) {
+		                errno = ENOBUFS;
+				ut_fatal(file, line, func, "!snprintf");
+				}
+
+	 return ret;
+        }
+
 /*
  * ut_strtoi -- a strtoi call that cannot return error
  */