diff --git a/src/test/java/walkingkooka/spreadsheet/format/provider/SpreadsheetFormattersSpreadsheetFormatterProviderTest.java b/src/test/java/walkingkooka/spreadsheet/format/provider/SpreadsheetFormattersSpreadsheetFormatterProviderTest.java
index d7468550b..7db9989d1 100644
--- a/src/test/java/walkingkooka/spreadsheet/format/provider/SpreadsheetFormattersSpreadsheetFormatterProviderTest.java
+++ b/src/test/java/walkingkooka/spreadsheet/format/provider/SpreadsheetFormattersSpreadsheetFormatterProviderTest.java
@@ -1074,6 +1074,15 @@ public void testSpreadsheetFormatterNextTokenWithFullDate() {
         );
     }
 
+    // full-date-time...................................................................................................
+
+    @Test
+    public void testSpreadsheetFormatterNextTokenWithFullDateTime() {
+        this.spreadsheetFormatterNextTokenAndCheck(
+            SpreadsheetFormatterName.LONG_DATE_TIME.setValueText("")
+        );
+    }
+
     // full-time........................................................................................................
 
     @Test