diff --git a/tests/GridRefUnitTests.pas b/tests/GridRefUnitTests.pas
index 42e2032..2be1c89 100644
--- a/tests/GridRefUnitTests.pas
+++ b/tests/GridRefUnitTests.pas
@@ -21,6 +21,8 @@   TGridRefUnitTest = class(TTestCase)
     procedure Test05;
     procedure Test06;
     procedure Test07;
+    procedure Test08;
+    procedure Test09;
   end;
 
 implementation
@@ -111,6 +113,34 @@ procedure TGridRefUnitTest.Test07;
   CheckTrue((temp1 = '53.33337') and (temp2 = '-0.15016'), 'TF 2328083424 as WGS84');
 end;
 
+procedure TGridRefUnitTest.Test08;
+var
+  OS : TOSGridRef;
+  pWGS84, pOSGB : TLatLon;
+  temp1, temp2 : string;
+begin
+  OS := TOSGridRef.Parse('TF 2328083424');
+  pOSGB := TOSGridRef.OSGridToLatLong(OS);
+  pWGS84 := ConvertOSGB36toWGS84(pOSGB);
+  temp1 := FormatFloat('##0.00000', pWGS84.Lat);
+  temp2 := FormatFloat('##0.00000', pWGS84.Lon);
+  CheckTrue((temp1 = '53.33337') and (temp2 = '-0.15016'), 'TF 2328083424 as WGS84');
+end;
+
+procedure TGridRefUnitTest.Test09;
+var
+  OS : TOSGridRef;
+  pWGS84, pOSGB : TLatLon;
+  temp1, temp2 : string;
+begin
+  OS := TOSGridRef.Parse('TF 23280 83424');
+  pOSGB := TOSGridRef.OSGridToLatLong(OS);
+  pWGS84 := ConvertOSGB36toWGS84(pOSGB);
+  temp1 := FormatFloat('##0.00000', pWGS84.Lat);
+  temp2 := FormatFloat('##0.00000', pWGS84.Lon);
+  CheckTrue((temp1 = '53.33337') and (temp2 = '-0.15016'), 'TF 2328083424 as WGS84');
+end;
+
 
 initialization
   // Register any test cases with the test runner