diff --git a/ClosedXML/Excel/XLWorkbook_Save.cs b/ClosedXML/Excel/XLWorkbook_Save.cs
index 82b319a..460a40d 100644
--- a/ClosedXML/Excel/XLWorkbook_Save.cs
+++ b/ClosedXML/Excel/XLWorkbook_Save.cs
@@ -3446,7 +3446,11 @@
             SaveContext context)
         {
             var differentialFormat = new DifferentialFormat();
-            differentialFormat.Append(GetNewFont(new FontInfo { Font = style.Font }, false));
+
+            var diffFont = GetNewFont(new FontInfo {Font = style.Font}, false);
+            if (diffFont.HasChildren)
+                differentialFormat.Append(diffFont);
+
             if (!String.IsNullOrWhiteSpace(style.NumberFormat.Format) || style.NumberFormat.NumberFormatId != 0)
             {
                 var numberFormat = new NumberingFormat();
@@ -3470,8 +3474,14 @@
 
                 differentialFormat.Append(numberFormat);
             }
-            differentialFormat.Append(GetNewFill(new FillInfo { Fill = style.Fill }, differentialFillFormat: true, ignoreMod: false));
-            differentialFormat.Append(GetNewBorder(new BorderInfo { Border = style.Border }, false));
+
+            var diffFill = GetNewFill(new FillInfo {Fill = style.Fill}, differentialFillFormat: true, ignoreMod: false);
+            if (diffFill.HasChildren)
+                differentialFormat.Append(diffFill);
+
+            var diffBorder = GetNewBorder(new BorderInfo {Border = style.Border}, false);
+            if (diffBorder.HasChildren)
+                differentialFormat.Append(diffBorder);
 
             differentialFormats.Append(differentialFormat);
 
diff --git a/ClosedXML_Tests/Resource/Examples/Misc/AddingDataSet.xlsx b/ClosedXML_Tests/Resource/Examples/Misc/AddingDataSet.xlsx
index 3b92a3c..1683c27 100644
--- a/ClosedXML_Tests/Resource/Examples/Misc/AddingDataSet.xlsx
+++ b/ClosedXML_Tests/Resource/Examples/Misc/AddingDataSet.xlsx
Binary files differ
diff --git a/ClosedXML_Tests/Resource/Examples/Misc/AddingDataTableAsWorksheet.xlsx b/ClosedXML_Tests/Resource/Examples/Misc/AddingDataTableAsWorksheet.xlsx
index d2ccbb3..55388ef 100644
--- a/ClosedXML_Tests/Resource/Examples/Misc/AddingDataTableAsWorksheet.xlsx
+++ b/ClosedXML_Tests/Resource/Examples/Misc/AddingDataTableAsWorksheet.xlsx
Binary files differ
diff --git a/ClosedXML_Tests/Resource/Examples/Misc/CopyingWorksheets.xlsx b/ClosedXML_Tests/Resource/Examples/Misc/CopyingWorksheets.xlsx
index 4ae8bda..57cf75f 100644
--- a/ClosedXML_Tests/Resource/Examples/Misc/CopyingWorksheets.xlsx
+++ b/ClosedXML_Tests/Resource/Examples/Misc/CopyingWorksheets.xlsx
Binary files differ
diff --git a/ClosedXML_Tests/Resource/Examples/Misc/ShowCase.xlsx b/ClosedXML_Tests/Resource/Examples/Misc/ShowCase.xlsx
index d73b247..780a546 100644
--- a/ClosedXML_Tests/Resource/Examples/Misc/ShowCase.xlsx
+++ b/ClosedXML_Tests/Resource/Examples/Misc/ShowCase.xlsx
Binary files differ
diff --git a/ClosedXML_Tests/Resource/Examples/Ranges/AddingRowToTables.xlsx b/ClosedXML_Tests/Resource/Examples/Ranges/AddingRowToTables.xlsx
index 83ae5ed..377c002 100644
--- a/ClosedXML_Tests/Resource/Examples/Ranges/AddingRowToTables.xlsx
+++ b/ClosedXML_Tests/Resource/Examples/Ranges/AddingRowToTables.xlsx
Binary files differ
diff --git a/ClosedXML_Tests/Resource/Examples/Tables/InsertingTables.xlsx b/ClosedXML_Tests/Resource/Examples/Tables/InsertingTables.xlsx
index 041aded..a16417a 100644
--- a/ClosedXML_Tests/Resource/Examples/Tables/InsertingTables.xlsx
+++ b/ClosedXML_Tests/Resource/Examples/Tables/InsertingTables.xlsx
Binary files differ
diff --git a/ClosedXML_Tests/Resource/Examples/Tables/UsingTables.xlsx b/ClosedXML_Tests/Resource/Examples/Tables/UsingTables.xlsx
index 72086c7..3bbdb81 100644
--- a/ClosedXML_Tests/Resource/Examples/Tables/UsingTables.xlsx
+++ b/ClosedXML_Tests/Resource/Examples/Tables/UsingTables.xlsx
Binary files differ