diff --git a/.drone.yml b/.drone.yml
index a8b94df..c50836c 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -25,7 +25,8 @@ pipeline:
       - make dep_install
       - make vet
       - make lint
-      - make test
+      # - make test
+      - coverage all
       - make coverage
       - make build
       # build binary for docker image
diff --git a/.drone.yml.sig b/.drone.yml.sig
index 4050839..d70228c 100644
--- a/.drone.yml.sig
+++ b/.drone.yml.sig
@@ -1 +1 @@
-eyJhbGciOiJIUzI1NiJ9.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.hxk64vDmuso-p3Efm2Q_2EqzUq8yohmwEMjh9KxgZiE
\ No newline at end of file
+eyJhbGciOiJIUzI1NiJ9.d29ya3NwYWNlOgogIGJhc2U6IC9zcnYvYXBwCiAgcGF0aDogc3JjL2dpdGh1Yi5jb20vYXBwbGVib3kvZHJvbmUtc3NoCgpwaXBlbGluZToKICBjbG9uZToKICAgIGltYWdlOiBwbHVnaW5zL2dpdAogICAgdGFnczogdHJ1ZQoKICAjIHJlc3RvcmUgdGhlIGNhY2hlIGZyb20gYW4gc2Z0cCBzZXJ2ZXIKICByZXN0b3JlX2NhY2hlOgogICAgaW1hZ2U6IGFwcGxlYm95L2Ryb25lLXNmdHAtY2FjaGUKICAgIHJlc3RvcmU6IHRydWUKICAgIG1vdW50OiBbIC5nbGlkZSwgdmVuZG9yIF0KICAgIGlnbm9yZV9icmFuY2g6IHRydWUKCiAgdGVzdDoKICAgIGltYWdlOiBhcHBsZWJveS9nb2xhbmctdGVzdGluZwogICAgcHVsbDogdHJ1ZQogICAgZW52aXJvbm1lbnQ6CiAgICAgIFRBR1M6IG5ldGdvCiAgICAgIEdPUEFUSDogL3Nydi9hcHAKICAgIGNvbW1hbmRzOgogICAgICAtIG1ha2Ugc3NoLXNlcnZlcgogICAgICAtIG1ha2UgZGVwX2luc3RhbGwKICAgICAgLSBtYWtlIHZldAogICAgICAtIG1ha2UgbGludAogICAgICAjIC0gbWFrZSB0ZXN0CiAgICAgIC0gY292ZXJhZ2UgYWxsCiAgICAgIC0gbWFrZSBjb3ZlcmFnZQogICAgICAtIG1ha2UgYnVpbGQKICAgICAgIyBidWlsZCBiaW5hcnkgZm9yIGRvY2tlciBpbWFnZQogICAgICAtIG1ha2Ugc3RhdGljX2J1aWxkCiAgICB3aGVuOgogICAgICBldmVudDogWyBwdXNoLCB0YWcsIHB1bGxfcmVxdWVzdCBdCgogIHJlbGVhc2U6CiAgICBpbWFnZTogYXBwbGVib3kvZ29sYW5nLXRlc3RpbmcKICAgIHB1bGw6IHRydWUKICAgIGVudmlyb25tZW50OgogICAgICBUQUdTOiBuZXRnbwogICAgICBHT1BBVEg6IC9zcnYvYXBwCiAgICBjb21tYW5kczoKICAgICAgLSBtYWtlIHJlbGVhc2UKICAgIHdoZW46CiAgICAgIGV2ZW50OiBbIHRhZyBdCiAgICAgIGJyYW5jaDogWyByZWZzL3RhZ3MvKiBdCgogIHB1Ymxpc2hfdGFnOgogICAgaW1hZ2U6IHBsdWdpbnMvZG9ja2VyCiAgICByZXBvOiAke0RST05FX1JFUE99CiAgICB0YWdzOiBbICcke0RST05FX1RBR30nIF0KICAgIHdoZW46CiAgICAgIGV2ZW50OiBbIHRhZyBdCiAgICAgIGJyYW5jaDogWyByZWZzL3RhZ3MvKiBdCgogIHB1Ymxpc2hfbGF0ZXN0OgogICAgaW1hZ2U6IHBsdWdpbnMvZG9ja2VyCiAgICByZXBvOiAke0RST05FX1JFUE99CiAgICB0YWdzOiBbICdsYXRlc3QnIF0KICAgIHdoZW46CiAgICAgIGV2ZW50OiBbIHB1c2ggXQogICAgICBicmFuY2g6IFsgbWFzdGVyIF0KCiAgcmVsZWFzZToKICAgIGltYWdlOiBwbHVnaW5zL2dpdGh1Yi1yZWxlYXNlCiAgICBmaWxlczoKICAgICAgLSBkaXN0L3JlbGVhc2UvKgogICAgd2hlbjoKICAgICAgZXZlbnQ6IFsgdGFnIF0KICAgICAgYnJhbmNoOiBbIHJlZnMvdGFncy8qIF0KCiAgIyByZWJ1aWxkIHRoZSBjYWNoZSBvbiB0aGUgc2Z0cCBzZXJ2ZXIKICByZWJ1aWxkX2NhY2hlOgogICAgaW1hZ2U6IGFwcGxlYm95L2Ryb25lLXNmdHAtY2FjaGUKICAgIHJlYnVpbGQ6IHRydWUKICAgIG1vdW50OiBbIC5nbGlkZSwgdmVuZG9yIF0KICAgIGlnbm9yZV9icmFuY2g6IHRydWUKICAgIHdoZW46CiAgICAgIGJyYW5jaDogbWFzdGVyCg.QQ3ZGG47tOzBUXT9vwzQ_YT_cyYeSsYnob2lSx69puw
\ No newline at end of file
diff --git a/.gitignore b/.gitignore
index d5e7c5d..67c4065 100644
--- a/.gitignore
+++ b/.gitignore
@@ -27,3 +27,4 @@ _testmain.go
 coverage.txt
 drone-ssh
 vendor
+.cover
diff --git a/Makefile b/Makefile
index 410a46d..0fbf29d 100644
--- a/Makefile
+++ b/Makefile
@@ -107,10 +107,10 @@ endif
 	docker push $(DEPLOY_ACCOUNT)/$(DEPLOY_IMAGE):$(tag)
 
 coverage:
-	sed -i '/main.go/d' coverage.txt
+	sed -i '/main.go/d' .cover/coverage.txt
 	curl -s https://codecov.io/bash > .codecov && \
 	chmod +x .codecov && \
-	./.codecov -f coverage.txt
+	./.codecov -f .cover/coverage.txt
 
 clean:
 	go clean -x -i ./...
diff --git a/easyssh/easyssh.go b/easyssh/easyssh.go
index a031b47..aba83e0 100644
--- a/easyssh/easyssh.go
+++ b/easyssh/easyssh.go
@@ -6,12 +6,9 @@ package easyssh
 
 import (
 	"bufio"
-	"fmt"
 	"io"
 	"io/ioutil"
 	"net"
-	"os"
-	"path/filepath"
 	"time"
 
 	"golang.org/x/crypto/ssh"
@@ -147,48 +144,3 @@ func (ssh_conf *MakeConfig) Run(command string) (outStr string, err error) {
 	// return the concatenation of all signals from the output channel
 	return outStr, err
 }
-
-// Scp uploads sourceFile to remote machine like native scp console app.
-func (ssh_conf *MakeConfig) Scp(sourceFile string) error {
-	session, err := ssh_conf.connect()
-
-	if err != nil {
-		return err
-	}
-	defer session.Close()
-
-	targetFile := filepath.Base(sourceFile)
-
-	src, srcErr := os.Open(sourceFile)
-
-	if srcErr != nil {
-		return srcErr
-	}
-
-	srcStat, statErr := src.Stat()
-
-	if statErr != nil {
-		return statErr
-	}
-
-	go func() {
-		w, _ := session.StdinPipe()
-
-		fmt.Fprintln(w, "C0644", srcStat.Size(), targetFile)
-
-		if srcStat.Size() > 0 {
-			io.Copy(w, src)
-			fmt.Fprint(w, "\x00")
-			w.Close()
-		} else {
-			fmt.Fprint(w, "\x00")
-			w.Close()
-		}
-	}()
-
-	if err := session.Run(fmt.Sprintf("scp -t %s", targetFile)); err != nil {
-		return err
-	}
-
-	return nil
-}