diff --git a/src/crypto/rsa/rsa_test.go b/src/crypto/rsa/rsa_test.go
index 0b1c8fb320b..9db78cec618 100644
--- a/src/crypto/rsa/rsa_test.go
+++ b/src/crypto/rsa/rsa_test.go
@@ -148,6 +148,7 @@ func TestEverything(t *testing.T) {
 		max = 2048
 	}
 	for size := min; size <= max; size++ {
+		size := size
 		t.Run(fmt.Sprintf("%d", size), func(t *testing.T) {
 			t.Parallel()
 			priv, err := GenerateKey(rand.Reader, size)