diff --git a/tests/kernel/workq/work/src/main.c b/tests/kernel/workq/work/src/main.c
index 342fd59a05bcb6..002da6fb545d4f 100644
--- a/tests/kernel/workq/work/src/main.c
+++ b/tests/kernel/workq/work/src/main.c
@@ -4,6 +4,15 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
+/* This test covers deprecated API.  Avoid inappropriate diagnostics
+ * about the use of that API.
+ */
+#include <toolchain.h>
+#undef __deprecated
+#define __deprecated
+#undef __DEPRECATED_MACRO
+#define __DEPRECATED_MACRO
+
 #include <ztest.h>
 
 #define STACK_SIZE (1024 + CONFIG_TEST_EXTRA_STACKSIZE)
diff --git a/tests/kernel/workq/work_queue/src/main.c b/tests/kernel/workq/work_queue/src/main.c
index f73803165d5a0f..83b07ae5f5cfd0 100644
--- a/tests/kernel/workq/work_queue/src/main.c
+++ b/tests/kernel/workq/work_queue/src/main.c
@@ -6,6 +6,15 @@
 
 #include <stdbool.h>
 
+/* This test covers deprecated API.  Avoid inappropriate diagnostics
+ * about the use of that API.
+ */
+#include <toolchain.h>
+#undef __deprecated
+#define __deprecated
+#undef __DEPRECATED_MACRO
+#define __DEPRECATED_MACRO
+
 #include <zephyr.h>
 #include <ztest.h>
 #include <tc_util.h>