diff --git a/RhSolutions.Tests/CanDoGuess.cs b/RhSolutions.Tests/CanDoGuess.cs
index c801af7..8e2d71c 100644
--- a/RhSolutions.Tests/CanDoGuess.cs
+++ b/RhSolutions.Tests/CanDoGuess.cs
@@ -18,7 +18,7 @@ public class CanDoGuess : IDisposable
     }
 
     [ExcelFact(Workbook = @"..\..\..\TestWorkbooks\TestSpecificationGuess.xlsx")]
-    public void CanWrite()
+    public void CanWriteMultiplyRows()
     {
         Worksheet sourceSheet = Util.Workbook.Worksheets[1];
         RhSolutionsAddIn.Configuration.SetPriceListPath(Path.GetFullPath(@"..\..\..\TestWorkbooks\TargetSpecificationGuess.xlsx"));
@@ -34,6 +34,23 @@ public class CanDoGuess : IDisposable
         Assert.Equal(products.First().Item2.Values.Sum(), targetProducts.First().Item2.Values.Sum());
     }
 
+    [ExcelFact(Workbook = @"..\..\..\TestWorkbooks\TestSpecificationGuessOneRow.xlsx")]
+    public void CanWriteOneRow()
+    {
+        Worksheet sourceSheet = Util.Workbook.Worksheets[1];
+        RhSolutionsAddIn.Configuration.SetPriceListPath(Path.GetFullPath(@"..\..\..\TestWorkbooks\TargetSpecificationGuessOneRow.xlsx"));
+        var products = _reader.ReadProducts(new[] { sourceSheet });
+        var _writer = new ExcelWriter(Util.Application, RhSolutionsAddIn.Configuration);
+        _writer.WriteProducts(products);
+        Worksheet targetSheet = Util.Application.ActiveWindow.ActiveSheet;
+        var targetProducts = _reader.ReadProducts(new[] { targetSheet });
+
+        Assert.Equal("TestSpecificationGuessOneRow", products.First().Item1);
+        Assert.Equal("TargetSpecificationGuessOneRow", targetProducts.First().Item1);
+        Assert.Equal(products.First().Item2.Count(), targetProducts.First().Item2.Count());
+        Assert.Equal(products.First().Item2.Values.Sum(), targetProducts.First().Item2.Values.Sum());
+    }
+
     public void Dispose()
     {
         _addIn.AutoClose();
diff --git a/RhSolutions.Tests/TestWorkbooks/TargetSpecificationGuessOneRow.xlsx b/RhSolutions.Tests/TestWorkbooks/TargetSpecificationGuessOneRow.xlsx
new file mode 100644
index 0000000..4501c1e
Binary files /dev/null and b/RhSolutions.Tests/TestWorkbooks/TargetSpecificationGuessOneRow.xlsx differ
diff --git a/RhSolutions.Tests/TestWorkbooks/TestSpecificationGuessOneRow.xlsx b/RhSolutions.Tests/TestWorkbooks/TestSpecificationGuessOneRow.xlsx
new file mode 100644
index 0000000..723789f
Binary files /dev/null and b/RhSolutions.Tests/TestWorkbooks/TestSpecificationGuessOneRow.xlsx differ