diff --git a/.golangci.yml b/.golangci.yml
index f3357120065..f5483f38e7f 100644
--- a/.golangci.yml
+++ b/.golangci.yml
@@ -50,6 +50,7 @@ linters:
     - ineffassign
     - lll
     - makezero
+    - mirror
     - misspell
     - nakedret
     - nestif
diff --git a/cmd/internal/nuget/client_test.go b/cmd/internal/nuget/client_test.go
index 31ded229bb8..af48233ca36 100644
--- a/cmd/internal/nuget/client_test.go
+++ b/cmd/internal/nuget/client_test.go
@@ -618,6 +618,6 @@ func testResult(wantErr bool, responseFileName string) (*http.Response, error) {
 	}
 	return &http.Response{
 		StatusCode: http.StatusOK,
-		Body:       io.NopCloser(bytes.NewBufferString(string(content))),
+		Body:       io.NopCloser(bytes.NewBuffer(content)),
 	}, nil
 }