one small additional precaution

unittests/pus/CMakeLists.txt

@@ -0,0 +1,3 @@
+target_sources(${FSFW_TEST_TGT} PRIVATE
+    testService11.cpp
+)

unittests/pus/testService11.cpp

@@ -0,0 +1,14 @@
+#include <fsfw/pus/Service11TelecommandScheduling.h>
+
+#include <catch2/catch_test_macros.hpp>
+
+#include "objects/systemObjectList.h"
+#include "tmtc/apid.h"
+#include "tmtc/pusIds.h"
+
+TEST_CASE("PUS Service 11", "[pus-srvc11]") {
+  Service11TelecommandScheduling<13> pusService11(objects::PUS_SERVICE_11_TC_SCHEDULER,
+                                                  apid::DEFAULT_APID, pus::PUS_SERVICE_11, nullptr);
+
+  // TODO test something...
+}