diff --git a/tests/unittests/tests-bhp_msg/Makefile b/tests/unittests/tests-bhp_msg/Makefile
new file mode 100644
index 0000000000000..48422e909a47d
--- /dev/null
+++ b/tests/unittests/tests-bhp_msg/Makefile
@@ -0,0 +1 @@
+include $(RIOTBASE)/Makefile.base
diff --git a/tests/unittests/tests-bhp_msg/Makefile.include b/tests/unittests/tests-bhp_msg/Makefile.include
new file mode 100644
index 0000000000000..c3828184f2622
--- /dev/null
+++ b/tests/unittests/tests-bhp_msg/Makefile.include
@@ -0,0 +1 @@
+USEMODULE += bhp_msg
diff --git a/tests/unittests/tests-bhp_msg/tests-bhp_msg.c b/tests/unittests/tests-bhp_msg/tests-bhp_msg.c
new file mode 100644
index 0000000000000..68ae09f5efc20
--- /dev/null
+++ b/tests/unittests/tests-bhp_msg/tests-bhp_msg.c
@@ -0,0 +1,101 @@
+/*
+ * Copyright (C) 2022 HAW Hamburg
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @{
+ *
+ * @file
+ */
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "bhp/msg.h"
+#include "embUnit.h"
+
+#include "unittests-constants.h"
+#include "tests-bhp_msg.h"
+
+static bhp_msg_t bhp_msg;
+static int canary;
+static int *ctx;
+
+static char _stack[THREAD_STACKSIZE_DEFAULT];
+
+static void bhp_handler(void *arg)
+{
+    TEST_ASSERT(arg == ctx);
+    canary = TEST_INT;
+}
+
+static void set_up(void)
+{
+    memset(&bhp_msg, '\0', sizeof(bhp_msg));
+    canary = 0;
+    bhp_msg_init(&bhp_msg, bhp_handler, ctx);
+}
+
+static void test_bhp_msg__init(void)
+{
+    TEST_ASSERT(bhp_msg.pid == KERNEL_PID_UNDEF);
+    TEST_ASSERT(bhp_msg.msg.type == BHP_MSG_BH_REQUEST);
+    TEST_ASSERT(bhp_msg.bhp.irq_handler == bhp_handler);
+    TEST_ASSERT(bhp_msg.bhp.ctx == ctx);
+}
+
+static void *_event_loop(void *arg)
+{
+    (void) arg;
+    while (1) {
+        msg_t msg;
+        msg_receive(&msg);
+        if (msg.type == BHP_MSG_BH_REQUEST) {
+            bhp_irq_handler(msg.content.ptr);
+        }
+    }
+
+    return NULL;
+}
+
+static void test_bhp_msg__claim(void)
+{
+    TEST_ASSERT_EQUAL_INT(0, bhp_msg.pid);
+    bhp_msg_claim_thread(&bhp_msg, TEST_UINT8);
+    TEST_ASSERT_EQUAL_INT(TEST_UINT8, bhp_msg.pid);
+}
+
+static void test_bhp_msg__cb(void)
+{
+    kernel_pid_t pid = thread_create(_stack, sizeof(_stack), THREAD_PRIORITY_MAIN - 1,
+                             THREAD_CREATE_STACKTEST, _event_loop, NULL,
+                             "bhp_msg");
+
+    bhp_msg_claim_thread(&bhp_msg, pid);
+    TEST_ASSERT_EQUAL_INT(0, canary);
+    bhp_msg_isr_cb(&bhp_msg);
+    TEST_ASSERT_EQUAL_INT(TEST_INT, canary);
+}
+
+Test *tests_bhp_msg_tests(void)
+{
+    EMB_UNIT_TESTFIXTURES(fixtures) {
+        new_TestFixture(test_bhp_msg__init),
+        new_TestFixture(test_bhp_msg__claim),
+        new_TestFixture(test_bhp_msg__cb),
+    };
+
+    EMB_UNIT_TESTCALLER(bhp_msg_tests, set_up, NULL, fixtures);
+
+    return (Test *)&bhp_msg_tests;
+}
+
+void tests_bhp_msg(void)
+{
+    TESTS_RUN(tests_bhp_msg_tests());
+}
+/** @} */
diff --git a/tests/unittests/tests-bhp_msg/tests-bhp_msg.h b/tests/unittests/tests-bhp_msg/tests-bhp_msg.h
new file mode 100644
index 0000000000000..481c24e36d0b5
--- /dev/null
+++ b/tests/unittests/tests-bhp_msg/tests-bhp_msg.h
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2022 HAW Hamburg
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @addtogroup  unittests
+ * @{
+ *
+ * @file
+ * @brief       Unittests for the @ref bhp_msg module
+ *
+ * @author      José I. Álamos <jose.alamos@haw-hamburg.de>
+ */
+#ifndef TESTS_BHP_MSG_H
+#define TESTS_BHP_MSG_H
+
+#include "embUnit.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief   The entry point of this test suite.
+ */
+void tests_bhp_msg(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* TESTS_BHP_MSG_H */
+/** @} */