diff --git a/Makefile b/Makefile
index dcc0036..7bba38a 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-TEST = "go test ./... -coverpkg=./... -coverprofile cp.out -covermode=atomic; go tool cover -func cp.out; rm cp.out"
+TEST = "go test ./... -coverpkg=./... -coverprofile coverage.txt -covermode=atomic; go tool cover -func coverage.txt"
 
 build:
 	docker build . -t underscore:latest