diff --git a/tests/ztest/mock/src/main.c b/tests/ztest/mock/src/main.c
index 9e8b72e5770..1192dd9ce67 100644
--- a/tests/ztest/mock/src/main.c
+++ b/tests/ztest/mock/src/main.c
@@ -52,12 +52,29 @@ static void test_multi_value_tests(void)
 	expect_two_parameters(2, 3);
 }
 
+static void returns_data(uint8_t *buf, size_t buf_size)
+{
+	ztest_copy_return_data(buf, buf_size);
+}
+
+static void test_return_data_tests(void)
+{
+	uint8_t expected_data[] = { 0x5A, 0xA5, 0xDE, 0xAD };
+	uint8_t data[] = { 0xFF, 0xFF, 0xFF, 0xFF };
+
+	ztest_expect_data(returns_data, buf, expected_data);
+
+	returns_data(data, sizeof(data));
+	zassert_mem_equal(expected_data, data, sizeof(data), NULL);
+}
+
 void test_main(void)
 {
 	ztest_test_suite(mock_framework_tests,
 			 ztest_unit_test(test_parameter_tests),
 			 ztest_unit_test(test_return_value_tests),
-			 ztest_unit_test(test_multi_value_tests)
+			 ztest_unit_test(test_multi_value_tests),
+			 ztest_unit_test(test_return_data_tests)
 			 );
 
 	ztest_run_test_suite(mock_framework_tests);