diff --git a/src/Makefile b/src/Makefile
index c234908..75c1267 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -70,6 +70,11 @@ clean:
 	@rm -rf workspace_*
 
 .PHONY: test
+test_%:
+	go test oc-deploy/$(subst test_,,$@) -coverprofile=.coverage.out -v
+	@go tool cover -html=.coverage.out -o .coverage.html
+
 test:
 	@go test ./... -coverprofile=.coverage.out -v
 	go tool cover -html=.coverage.out -o .coverage.html
+
diff --git a/src/utils/download.go b/src/utils/download.go
index 31f500a..ef70df5 100644
--- a/src/utils/download.go
+++ b/src/utils/download.go
@@ -1,7 +1,6 @@
 package utils
 
 import (
-    // "fmt"
     "os"
     "io"
     "path"
@@ -56,7 +55,7 @@ func ExtractTarGz(dest string, gzipStream io.Reader) error {
             // 	return err
             // }
         case tar.TypeReg:
-            outName := dest + "/" + path.Base( header.Name)
+            outName := dest + "/" + path.Base(header.Name)
             outFile, _ := os.Create(outName)
             if err != nil {
                 return err
diff --git a/src/utils/download_test.go b/src/utils/download_test.go
index 66f56ba..54c83ce 100644
--- a/src/utils/download_test.go
+++ b/src/utils/download_test.go
@@ -1,8 +1,7 @@
 package utils
 
-// https://pkg.go.dev/github.com/stretchr/testify/assert#Nilf
-
 import (
+    "os"
     "path/filepath"
 
     "testing"
@@ -26,3 +25,27 @@ func TestDownload(t *testing.T) {
     assert.Nilf(t, err, "error message %s", url)
     assert.FileExists(t, dest, "DownloadFromUrl error")
 }
+
+func TestExtractTarGz(t *testing.T) {
+
+  dest := filepath.Join(TEST_DEST_DIR, "extract")
+	os.MkdirAll(dest, os.ModePerm)
+
+  src := filepath.Join(TEST_SRC_DIR, "fichier1.tgz")
+  file, _ := os.Open(src)
+
+  err := ExtractTarGz(dest, file)
+  assert.Nilf(t, err, "error message %s", src)
+  assert.FileExists(t, filepath.Join(dest, "fichier1"), "TestExtractTarGz error")
+}
+
+func TestExtractTarGzErr(t *testing.T) {
+
+    dest := filepath.Join(TEST_DEST_DIR, "extract")
+
+    src := filepath.Join(TEST_SRC_DIR, "fichier1")
+    file, _ := os.Open(src)
+
+    err := ExtractTarGz(dest, file)
+    assert.NotNilf(t, err, "error message %s", src)
+}
\ No newline at end of file
diff --git a/src/utils/main_test.go b/src/utils/main_test.go
index 2128336..c34f571 100644
--- a/src/utils/main_test.go
+++ b/src/utils/main_test.go
@@ -1,23 +1,25 @@
 package utils
 
+// https://pkg.go.dev/github.com/stretchr/testify/assert
+
 import (
-	"os"
-	"testing"
-	"path/filepath"
+    "os"
+    "testing"
+    "path/filepath"
 )
 
 var TEST_DEST_DIR = "../wrk_utils"
 var TEST_SRC_DIR = filepath.Join("../../test", "utils")
 
 func TestMain(m *testing.M) {
-	folderPath := TEST_DEST_DIR
+    folderPath := TEST_DEST_DIR
 
-	os.RemoveAll(folderPath)
-	os.MkdirAll(folderPath, os.ModePerm)
+    os.RemoveAll(folderPath)
+    os.MkdirAll(folderPath, os.ModePerm)
 
-	// call flag.Parse() here if TestMain uses flags
-	exitCode := m.Run()
+    // call flag.Parse() here if TestMain uses flags
+    exitCode := m.Run()
 
-	os.RemoveAll(folderPath)
-	os.Exit(exitCode)
+    os.RemoveAll(folderPath)
+    os.Exit(exitCode)
 }
\ No newline at end of file
diff --git a/src/utils/slice_test.go b/src/utils/slice_test.go
new file mode 100644
index 0000000..18c462f
--- /dev/null
+++ b/src/utils/slice_test.go
@@ -0,0 +1,22 @@
+package utils
+
+import (
+    "testing"
+    "github.com/stretchr/testify/assert"
+)
+
+func TestSliceInStringExist(t *testing.T) {
+    liste := []string{"text1", "text2"}
+
+    res := StringInSlice("text1", liste)
+
+    assert.Truef(t, res, "error message %s", "text1")
+}
+
+func TestSliceInStringNotExist(t *testing.T) {
+    liste := []string{"text1", "text2"}
+
+    res := StringInSlice("text3", liste)
+
+    assert.Falsef(t, res, "error message %s", "text3")
+}
diff --git a/test/utils/fichier1.tgz b/test/utils/fichier1.tgz
new file mode 100644
index 0000000..8270257
Binary files /dev/null and b/test/utils/fichier1.tgz differ