diff --git a/subsys/testsuite/coverage/coverage.c b/subsys/testsuite/coverage/coverage.c
index 739251bc9bc..652500097d5 100644
--- a/subsys/testsuite/coverage/coverage.c
+++ b/subsys/testsuite/coverage/coverage.c
@@ -73,8 +73,15 @@ size_t calculate_buff_size(struct gcov_info *info)
 	uint32_t iter;
 	uint32_t iter_1;
 	uint32_t iter_2;
-	/* few Fixed values at the start version, stamp and magic number. */
+
+	/* Few fixed values at the start: magic number,
+	 * version, stamp, and checksum.
+	 */
+#ifdef GCOV_12_FORMAT
+	uint32_t size = sizeof(uint32_t) * 4;
+#else
 	uint32_t size = sizeof(uint32_t) * 3;
+#endif
 
 	for (iter = 0U; iter < info->n_functions; iter++) {
 		/* space for TAG_FUNCTION and FUNCTION_LENGTH
@@ -137,6 +144,12 @@ size_t populate_buffer(uint8_t *buffer, struct gcov_info *info)
 		       &buffer_write_position,
 		       info->stamp);
 
+#ifdef GCOV_12_FORMAT
+	buff_write_u32(buffer,
+		       &buffer_write_position,
+		       info->checksum);
+#endif
+
 	for (iter_functions = 0U;
 	     iter_functions < info->n_functions;
 	     iter_functions++) {
@@ -178,9 +191,16 @@ size_t populate_buffer(uint8_t *buffer, struct gcov_info *info)
 				       &buffer_write_position,
 				       GCOV_TAG_FOR_COUNTER(iter_counts));
 
+#ifdef GCOV_12_FORMAT
+			/* GCOV 12 counts the length by bytes */
+			buff_write_u32(buffer,
+				       &buffer_write_position,
+				       counters_per_func->num * 2U * 4);
+#else
 			buff_write_u32(buffer,
 				       &buffer_write_position,
 				       counters_per_func->num * 2U);
+#endif
 
 			for (iter_counter_values = 0U;
 			     iter_counter_values < counters_per_func->num;
diff --git a/subsys/testsuite/coverage/coverage.h b/subsys/testsuite/coverage/coverage.h
index af4a125b0b3..395d03075ca 100644
--- a/subsys/testsuite/coverage/coverage.h
+++ b/subsys/testsuite/coverage/coverage.h
@@ -38,9 +38,26 @@
 #define GCOV_COUNTERS 10U
 #endif
 
+/* The GCOV 12 gcno/gcda format has slight change,
+ * Please refer to gcov-io.h in the GCC 12 for
+ * more details.
+ *
+ * Following GCC commits introduced these changes:
+ * gcc-mirror/gcc@23eb66d
+ * gcc-mirror/gcc@72e0c74
+ */
+#if (__GNUC__ >= 12)
+#define GCOV_12_FORMAT
+#endif
+
 typedef uint64_t gcov_type;
 
+#ifdef GCOV_12_FORMAT
+#define GCOV_TAG_FUNCTION_LENGTH  12
+#else
 #define GCOV_TAG_FUNCTION_LENGTH  3
+#endif
+
 #define GCOV_DATA_MAGIC   (0x67636461)
 #define GCOV_TAG_FUNCTION (0x01000000)
 #define GCOV_TAG_COUNTER_BASE (0x01a10000)
@@ -77,7 +94,7 @@ struct gcov_fn_info {
 	unsigned int ident;              /* unique ident of function */
 	unsigned int lineno_checksum;    /* function lineno_checksum */
 	unsigned int cfg_checksum;       /* function cfg checksum */
-	struct gcov_ctr_info ctrs[0];    /* instrumented counters */
+	struct gcov_ctr_info ctrs[1];    /* instrumented counters */
 };
 
 /** Profiling data per object file
@@ -89,6 +106,9 @@ struct gcov_info {
 	unsigned int version;        /* Gcov version (same as GCC version) */
 	struct gcov_info *next;      /* List head for a singly-linked list */
 	unsigned int stamp;          /* Uniquifying time stamp */
+#ifdef GCOV_12_FORMAT
+	unsigned int checksum;		/* unique object checksum */
+#endif
 	const char *filename;        /* Name of the associated gcda data file */
 	/* merge functions, null for unused*/
 	void (*merge[GCOV_COUNTERS])(gcov_type *, unsigned int);