diff --git a/test/cmocka/src/common_mocks.c b/test/cmocka/src/common_mocks.c
index 59ed9fce4..e362f4b95 100644
--- a/test/cmocka/src/common_mocks.c
+++ b/test/cmocka/src/common_mocks.c
@@ -100,6 +100,7 @@ void WEAK __panic(uint32_t p, char *filename, uint32_t linenum)
 	exit(EXIT_FAILURE);
 }
 
+#if CONFIG_TRACE
 void WEAK trace_log_filtered(bool send_atomic, const void *log_entry, const struct tr_ctx *ctx,
 			     uint32_t lvl, uint32_t id_1, uint32_t id_2, int arg_count, ...)
 {
@@ -115,6 +116,7 @@ void WEAK trace_log_filtered(bool send_atomic, const void *log_entry, const stru
 void WEAK trace_flush_dma_to_mbox(void)
 {
 }
+#endif
 
 #if CONFIG_LIBRARY
 volatile void *task_context_get(void);
@@ -330,6 +332,8 @@ int WEAK arch_cpu_is_core_enabled(int id)
 int WEAK test_bench_trace = 1;
 int WEAK debug;
 
+/* ... but not always in unit tests */
+#if CONFIG_TRACE
 /* look up subsystem class name from table */
 char * WEAK get_trace_class(uint32_t trace_class)
 {
@@ -339,6 +343,7 @@ char * WEAK get_trace_class(uint32_t trace_class)
 	 */
 	return "unknown";
 }
+#endif
 
 uint8_t * WEAK get_library_mailbox(void)
 {