diff --git a/container-engine-lib/lib/backend_impls/docker/docker_manager/docker_auth_test.go b/container-engine-lib/lib/backend_impls/docker/docker_manager/docker_auth_test.go
index bd38048a59..73d81d8c49 100644
--- a/container-engine-lib/lib/backend_impls/docker/docker_manager/docker_auth_test.go
+++ b/container-engine-lib/lib/backend_impls/docker/docker_manager/docker_auth_test.go
@@ -29,22 +29,25 @@ func WriteStaticConfig(t *testing.T, configContent string) string {
 }
 
 func TestGetAuthConfigForRepoPlain(t *testing.T) {
-	cfg := `
+	expectedAuth := registry.AuthConfig{
+		Username: "user",
+		Password: "password",
+	}
+
+	base64Auth := base64.StdEncoding.EncodeToString([]byte(fmt.Sprintf("%s:%s", expectedAuth.Username, expectedAuth.Password)))
+
+	cfg := fmt.Sprintf(`
 	{
 		"auths": {
 			"https://index.docker.io/v1/": {
-				"auth": "dXNlcjpwYXNzd29yZA=="
+				"auth": "%s"
 			}
 		}
-	}
-	`
+	}`, base64Auth)
+
 	tmpDir := WriteStaticConfig(t, cfg)
 	defer os.RemoveAll(tmpDir)
 
-	expectedAuth := registry.AuthConfig{
-		Username: "user",
-		Password: "password",
-	}
 	encodedAuth := base64.StdEncoding.EncodeToString([]byte(fmt.Sprintf("%s:%s", expectedAuth.Username, expectedAuth.Password)))
 
 	// Test 1: Retrieve auth config for Docker Hub using docker.io domain