diff --git a/tests/unittests/tests-hash_string/Makefile b/tests/unittests/tests-hash_string/Makefile
new file mode 100644
index 0000000000..48422e909a
--- /dev/null
+++ b/tests/unittests/tests-hash_string/Makefile
@@ -0,0 +1 @@
+include $(RIOTBASE)/Makefile.base
diff --git a/tests/unittests/tests-hash_string/Makefile.include b/tests/unittests/tests-hash_string/Makefile.include
new file mode 100644
index 0000000000..f00ccb4f5b
--- /dev/null
+++ b/tests/unittests/tests-hash_string/Makefile.include
@@ -0,0 +1 @@
+USEMODULE += hash_string