diff --git a/testing/makefiles/libcommon.mk b/testing/makefiles/libcommon.mk
index 2dbb976d..2a74ff01 100644
--- a/testing/makefiles/libcommon.mk
+++ b/testing/makefiles/libcommon.mk
@@ -47,4 +47,4 @@ ${OBJ_DIR}/%.o: ${top_dir}/testing/%.cpp ${H_FILES}
 		$<
 
 clean:
-	rm -rf "${build_dir}"
+	rm -rf -- "${build_dir}"
diff --git a/testing/makefiles/testcase.mk b/testing/makefiles/testcase.mk
index 288724a1..c5882ca9 100644
--- a/testing/makefiles/testcase.mk
+++ b/testing/makefiles/testcase.mk
@@ -105,7 +105,7 @@ ${OBJ_DIR}/%.o: ${SRC_DIR}/%.cpp
 		$<
 
 clean:
-	rm -f "${SRC_DIR}/generated-testcase.cpp"
-	rm -rf "${build_dir}"
+	rm -f -- "${SRC_DIR}/generated-testcase.cpp"
+	rm -rf -- "${build_dir}"
 
 .PHONY: clean run all build