diff --git a/c.mk b/c.mk
deleted file mode 100644
index 5efc3d91..00000000
--- a/c.mk
+++ /dev/null
@@ -1,3 +0,0 @@
-.PHONY: c
-c:
-	@echo hello c.mk!2
diff --git a/makefiles/test.mk b/makefiles/test.mk
index e9502fc4..7b5ea2d2 100644
--- a/makefiles/test.mk
+++ b/makefiles/test.mk
@@ -1,3 +1,4 @@
+# this file is for testing purposes only
 include ./makefiles/test2.mk
 
 .PHONY: echo-test2
diff --git a/makefiles/test2.mk b/makefiles/test2.mk
index 52e34376..5b359ac8 100644
--- a/makefiles/test2.mk
+++ b/makefiles/test2.mk
@@ -1,3 +1,4 @@
+# this file is for testing purposes only
 .PHONY: test2
 test2:
 	echo "test2"