diff --git a/app/src/main/java/io/nekohasekai/sagernet/widget/LinkOrContentPreference.kt b/app/src/main/java/io/nekohasekai/sagernet/widget/LinkOrContentPreference.kt
index b4f03af..d9da726 100644
--- a/app/src/main/java/io/nekohasekai/sagernet/widget/LinkOrContentPreference.kt
+++ b/app/src/main/java/io/nekohasekai/sagernet/widget/LinkOrContentPreference.kt
@@ -48,6 +48,9 @@ constructor(
                     } else {
                         linkLayout.isErrorEnabled = false
                     }
+                    if (link.contains("\n")) {
+                        linkLayout.error = "Unexpected new line"
+                    }
                 } catch (e: Exception) {
                     linkLayout.error = e.readableMessage
                     linkLayout.isErrorEnabled = true
diff --git a/app/src/main/res/layout/layout_urltest_preference_dialog.xml b/app/src/main/res/layout/layout_urltest_preference_dialog.xml
index 6562b10..94ba69b 100644
--- a/app/src/main/res/layout/layout_urltest_preference_dialog.xml
+++ b/app/src/main/res/layout/layout_urltest_preference_dialog.xml
@@ -24,10 +24,9 @@
                 android:id="@android:id/edit"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
-                android:inputType="textUri"
+                android:inputType="textUri|textMultiLine"
                 android:minHeight="48dp"
                 android:paddingTop="12dp"
-                android:singleLine="true"
                 android:typeface="monospace" />
 
             <LinearLayout