diff --git a/components/fpspreadsheet/tests/formattests.pas b/components/fpspreadsheet/tests/formattests.pas
index e82b28713..9e7e0f7c7 100644
--- a/components/fpspreadsheet/tests/formattests.pas
+++ b/components/fpspreadsheet/tests/formattests.pas
@@ -10,6 +10,10 @@ units (e.g. datetests).
 }
 
 uses
+  {$IFDEF Unix}
+  //required for formatsettings
+  clocale,
+  {$ENDIF}
   // Not using Lazarus package as the user may be working with multiple versions
   // Instead, add .. to unit search path
   Classes, SysUtils, fpcunit, testutils, testregistry,
diff --git a/components/fpspreadsheet/tests/rpnformulaunit.pas b/components/fpspreadsheet/tests/rpnformulaunit.pas
index cbec39b50..e5f380297 100644
--- a/components/fpspreadsheet/tests/rpnformulaunit.pas
+++ b/components/fpspreadsheet/tests/rpnformulaunit.pas
@@ -3,6 +3,9 @@ unit rpnFormulaUnit;
 interface
 
 uses
+  {$IFDEF Unix}
+  clocale, //required for formatsettings
+  {$ENDIF}
   SysUtils, fpspreadsheet,fpsutils;
 
 procedure WriteRPNFormulaSamples(Worksheet: TsWorksheet;