diff --git a/src/Verify/IoHelpers.cs b/src/Verify/IoHelpers.cs
index 277697f3cb..4db6df4eab 100644
--- a/src/Verify/IoHelpers.cs
+++ b/src/Verify/IoHelpers.cs
@@ -117,8 +117,12 @@ public static async Task<StringBuilder> ReadStringBuilderWithFixedLines(this Str
     {
         stream.MoveToStart();
         using var reader = new StreamReader(stream);
-        var builder = new StringBuilder(await reader.ReadToEndAsync());
-        builder.FixNewlines();
+        var contents = await reader.ReadToEndAsync();
+        var builder = new StringBuilder(contents);
+        if (contents.Contains('\n'))
+        {
+            builder.FixNewlines();
+        }
 
         return builder;
     }