diff --git a/.drone.yml b/.drone.yml
index 5ccfcc5..b37eba8 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -7,8 +7,10 @@ steps:
   - name: test
     image: golang:1.13
     commands:
-      - go vet ./...
-      - go test ./...
+      - go test ./cmd/... ./internal/...
+      - go vet ./cmd/... ./internal/...
+      - go get -u golang.org/x/lint/golint
+      - golint ./cmd/... ./internal/...
   - name: build
     image: golang:1.13
     commands:
diff --git a/go.mod b/go.mod
index c060a9c..4f4371b 100644
--- a/go.mod
+++ b/go.mod
@@ -7,5 +7,5 @@ require (
 	github.com/kelseyhightower/envconfig v1.4.0
 	github.com/stretchr/testify v1.4.0
 	golang.org/x/lint v0.0.0-20191125180803-fdd1cda4f05f // indirect
-	golang.org/x/tools v0.0.0-20191206204035-259af5ff87bd // indirect
+	golang.org/x/tools v0.0.0-20191209225234-22774f7dae43 // indirect
 )
diff --git a/go.sum b/go.sum
index f8cbd31..c0d66c9 100644
--- a/go.sum
+++ b/go.sum
@@ -23,6 +23,8 @@ golang.org/x/tools v0.0.0-20191125144606-a911d9008d1f h1:kDxGY2VmgABOe55qheT/TFq
 golang.org/x/tools v0.0.0-20191125144606-a911d9008d1f/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191206204035-259af5ff87bd h1:Zc7EU2PqpsNeIfOoVA7hvQX4cS3YDJEs5KlfatT3hLo=
 golang.org/x/tools v0.0.0-20191206204035-259af5ff87bd/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.0.0-20191209225234-22774f7dae43 h1:NfPq5mgc5ArFgVLCpeS4z07IoxSAqVfV/gQ5vxdgaxI=
+golang.org/x/tools v0.0.0-20191209225234-22774f7dae43/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=