diff --git a/src/DotnetDiffCoverage/Output/JsonReporter.cs b/src/DotnetDiffCoverage/Output/JsonReporter.cs
index 757d54c..1732c09 100644
--- a/src/DotnetDiffCoverage/Output/JsonReporter.cs
+++ b/src/DotnetDiffCoverage/Output/JsonReporter.cs
@@ -15,6 +15,11 @@ public sealed class JsonReporter
 
     public async Task WriteAsync(CrossReferenceResult result, Stream stream)
     {
+        if (result == null)
+        {
+            return;
+        }
+        
         var report = new
         {
             summary = new