fix review comments

Signed-off-by: Tomasz Duda <tomaszduda23@gmail.com>

Author: tomaszduda23

age/tui.go

@@ -14,6 +14,7 @@ import (
 	"fmt"
 	"os"
 	"runtime"
+	"testing"
 
 	"golang.org/x/term"
 )
@@ -25,9 +26,11 @@ const (
 // readPassphrase reads a passphrase from the terminal. It does not read from a
 // non-terminal stdin, so it does not check stdinInUse.
 func readPassphrase(prompt string) ([]byte, error) {
-	password := os.Getenv(SopsAgePasswordEnv)
-	if password != "" {
-		return []byte(password), nil
+	if testing.Testing() {
+		password := os.Getenv(SopsAgePasswordEnv)
+		if password != "" {
+			return []byte(password), nil
+		}
 	}
 
 	var in, out *os.File