diff --git a/src/ServiceLayer.Mesh/FileTypes/NbssAppointmentEvents/Models/ParsedFile.cs b/src/ServiceLayer.Mesh/FileTypes/NbssAppointmentEvents/Models/ParsedFile.cs
index 0820905..59acfc5 100644
--- a/src/ServiceLayer.Mesh/FileTypes/NbssAppointmentEvents/Models/ParsedFile.cs
+++ b/src/ServiceLayer.Mesh/FileTypes/NbssAppointmentEvents/Models/ParsedFile.cs
@@ -4,6 +4,5 @@ public class ParsedFile
 {
     public FileHeaderRecord? FileHeader { get; set; }
     public FileTrailerRecord? FileTrailer { get; set; }
-    public required List<string> ColumnHeadings { get; set; } = [];
     public required List<FileDataRecord> DataRecords { get; set; } = [];
 }
diff --git a/tests/ServiceLayer.Mesh.Tests/FileTypes/NbssAppointmentEvents/TestDataBuilder.cs b/tests/ServiceLayer.Mesh.Tests/FileTypes/NbssAppointmentEvents/TestDataBuilder.cs
new file mode 100644
index 0000000..ecbc236
--- /dev/null
+++ b/tests/ServiceLayer.Mesh.Tests/FileTypes/NbssAppointmentEvents/TestDataBuilder.cs
@@ -0,0 +1,94 @@
+using ServiceLayer.Mesh.FileTypes.NbssAppointmentEvents.Models;
+
+namespace ServiceLayer.Mesh.Tests.FileTypes.NbssAppointmentEvents;
+
+public static class TestDataBuilder
+{
+    public static ParsedFile BuildValidParsedFile(int numberOfRecords = 3)
+    {
+        var header = new FileHeaderRecord
+        {
+            RecordTypeIdentifier = "NBSSAPPT_HDR",
+            ExtractId = "00000107",
+            TransferStartDate = "20250519",
+            TransferStartTime = "153806",
+            RecordCount = numberOfRecords.ToString()
+        };
+
+        var trailer = new FileTrailerRecord
+        {
+            RecordTypeIdentifier = "NBSSAPPT_END",
+            ExtractId = "00000107",
+            TransferEndDate = "20250519",
+            TransferEndTime = "153957",
+            RecordCount = numberOfRecords.ToString()
+        };
+
+        var dataRecords = Enumerable.Range(1, numberOfRecords)
+            .Select(BuildValidFileDataRecord)
+            .ToList();
+
+        return new ParsedFile
+        {
+            FileHeader = header,
+            FileTrailer = trailer,
+            DataRecords = dataRecords
+        };
+    }
+
+    public static FileDataRecord BuildValidFileDataRecord(int rowNumber = 1)
+    {
+        return new FileDataRecord
+        {
+            RowNumber = rowNumber,
+            Fields =
+            {
+                ["NBSSAPPT_FLDS"] = "NBSSAPPT_DATA",
+                ["Sequence"] = rowNumber.ToString("D6"),
+                ["BSO"] = "KMK",
+                ["Action"] = "B",
+                ["Clinic Code"] = "BU003",
+                ["Holding Clinic"] = "N",
+                ["Status"] = "B",
+                ["Attended Not Scr"] = "",
+                ["Appointment ID"] = "BU003-67291-RA1-DN-T1130-1",
+                ["NHS Num"] = "9111104716",
+                ["Episode Type"] = "F",
+                ["Episode Start"] = "20250317",
+                ["Batch ID"] = "KMK001334",
+                ["Screen or Asses"] = "S",
+                ["Screen Appt num"] = "1",
+                ["Booked By"] = "H",
+                ["Cancelled By"] = "",
+                ["Appt Date"] = "20250327",
+                ["Appt Time"] = "1130",
+                ["Location"] = "BU",
+                ["Clinic Name"] = "BREAST CARE UNIT",
+                ["Clinic Name (Let)"] = "BREAST CARE UNIT",
+                ["Clinic Address 1"] = "BREAST CARE UNIT",
+                ["Clinic Address 2"] = "MILTON KEYNES HOSPITAL",
+                ["Clinic Address 3"] = "STANDING WAY",
+                ["Clinic Address 4"] = "MILTON KEYNES",
+                ["Clinic Address 5"] = "MK6 5LD",
+                ["Postcode"] = "MK6 5LD",
+                ["Action Timestamp"] = "20250317-132635",
+            }
+        };
+    }
+
+    public static FileDataRecord BuildFileDataRecordWithField(string fieldName, string? fieldValue, int rowNumber = 1)
+    {
+        var fileDataRecord = BuildValidFileDataRecord(rowNumber);
+
+        if (fieldValue == null)
+        {
+            fileDataRecord.Fields.Remove(fieldName);
+        }
+        else
+        {
+            fileDataRecord.Fields[fieldName] = fieldValue;
+        }
+
+        return fileDataRecord;
+    }
+}