diff --git a/components/ideintf/ideexterntoolintf.pas b/components/ideintf/ideexterntoolintf.pas
index 83941ee454..fb8c146cdd 100644
--- a/components/ideintf/ideexterntoolintf.pas
+++ b/components/ideintf/ideexterntoolintf.pas
@@ -37,6 +37,7 @@ const
   IDEToolCompilePackage = 'Package';
   IDEToolCompileProject = 'Project'; // the active project
   IDEToolCompileIDE     = 'IDE';
+
 type
 
   { TIDEExternalToolData
@@ -48,7 +49,9 @@ type
     Kind: string; // e.g. IDEToolCompilePackage or IDEToolCompileProject
     ModuleName: string; // e.g. the package name
     Filename: string; // e.g. the lpi or lpk filename
+    Flags: TStrings;
     constructor Create(aKind, aModuleName, aFilename: string);
+    destructor Destroy; override;
   end;
 
 type
@@ -462,6 +465,7 @@ type
     FTitle: string;
     FTools: TIDEExternalTools;
     FViews: TFPList; // list of TExtToolView
+    FCurrentDirectoryIsTestDir: boolean;
     function GetCmdLineParams: string;
     function GetParserCount: integer;
     function GetParsers(Index: integer): TExtToolParser;
@@ -529,6 +533,8 @@ type
     function ResolveMacros: boolean; virtual; abstract; // resolve macros in Process.Executable, Process.CurrentDirectory, Process.Params, Process.Environment on Execute
     property ResolveMacrosOnExecute: boolean read FResolveMacrosOnExecute
       write FResolveMacrosOnExecute;
+    property CurrentDirectoryIsTestDir: boolean read FCurrentDirectoryIsTestDir
+      write FCurrentDirectoryIsTestDir; // virtual files were written to test directory, parsers should reverse source filenames
     property Stage: TExternalToolStage read FStage;
     procedure Execute; virtual; abstract;
     procedure Terminate; virtual; abstract;
@@ -769,6 +775,13 @@ begin
   Kind:=aKind;
   ModuleName:=aModuleName;
   Filename:=aFilename;
+  Flags:=TStringList.Create;
+end;
+
+destructor TIDEExternalToolData.Destroy;
+begin
+  FreeAndNil(Flags);
+  inherited Destroy;
 end;
 
 { TFPCParser }
diff --git a/ide/compiler.pp b/ide/compiler.pp
index 477e81a725..597efdd01c 100644
--- a/ide/compiler.pp
+++ b/ide/compiler.pp
@@ -56,9 +56,8 @@ type
     destructor Destroy; override;
     function Compile(AProject: TProject;
                      const WorkingDir, CompilerFilename, CompilerParams: string;
-                     BuildAll, SkipLinking, SkipAssembler: boolean;
-                     const aCompileHint: string
-                    ): TModalResult;
+                     BuildAll, SkipLinking, SkipAssembler, CurrentDirectoryIsTestDir: boolean;
+                     const aCompileHint: string): TModalResult;
     procedure WriteError(const Msg: string);
   end;
 
@@ -218,7 +217,7 @@ type
     property ErrorMsg: String read fErrorMsg write fErrorMsg;
   end;
 
-  { TCompilerOptThread }
+  { TCompilerOptThread - thread for reading 'fpc -h' output }
 
   TCompilerOptThread = class(TThread)
   private
@@ -265,7 +264,8 @@ end;
 ------------------------------------------------------------------------------}
 function TCompiler.Compile(AProject: TProject; const WorkingDir,
   CompilerFilename, CompilerParams: string; BuildAll, SkipLinking,
-  SkipAssembler: boolean; const aCompileHint: string): TModalResult;
+  SkipAssembler, CurrentDirectoryIsTestDir: boolean; const aCompileHint: string
+  ): TModalResult;
 var
   CmdLine : String;
   Abort : Boolean;
@@ -335,6 +335,7 @@ begin
     Tool.Process.Executable:=CompilerFilename;
     Tool.CmdLineParams:=CmdLine;
     Tool.Process.CurrentDirectory:=WorkingDir;
+    Tool.CurrentDirectoryIsTestDir:=CurrentDirectoryIsTestDir;
     FPCParser:=TFPCParser(Tool.AddParsers(SubToolFPC));
     FPCParser.ShowLinesCompiled:=EnvironmentOptions.MsgViewShowFPCMsgLinesCompiled;
     FPCParser.HideHintsSenderNotUsed:=not AProject.CompilerOptions.ShowHintsForSenderNotUsed;
diff --git a/ide/etmessageframe.pas b/ide/etmessageframe.pas
index a83b35a858..6c00753f7d 100644
--- a/ide/etmessageframe.pas
+++ b/ide/etmessageframe.pas
@@ -3180,8 +3180,13 @@ begin
     if Proc<>nil then begin
       if Proc.Executable<>'' then
         s+='Executable: '+LineEnding+Proc.Executable+LineEnding+LineEnding;
-      if Proc.CurrentDirectory<>'' then
-        s+='CurrentDirectory: '+LineEnding+Proc.CurrentDirectory+LineEnding+LineEnding;
+      if Proc.CurrentDirectory<>'' then begin
+        if Tool.CurrentDirectoryIsTestDir then
+          s+='CurrentDirectory is test build directory:'
+        else
+          s+='CurrentDirectory:';
+        s+=LineEnding+Proc.CurrentDirectory+LineEnding+LineEnding;
+      end;
       if Proc.Desktop<>'' then
         s+='Desktop: '+Proc.Desktop+LineEnding;
       if Tool.EnvironmentOverrides.Text<>'' then
diff --git a/ide/main.pp b/ide/main.pp
index 16491f62d7..1d8146d57c 100644
--- a/ide/main.pp
+++ b/ide/main.pp
@@ -6795,7 +6795,8 @@ begin
                                 WorkingDir,CompilerFilename,CompilerParams,
                                 (AReason = crBuild) or NeedBuildAllFlag,
                                 pbfSkipLinking in Flags,
-                                pbfSkipAssembler in Flags,aCompileHint);
+                                pbfSkipAssembler in Flags,Project1.IsVirtual,
+                                aCompileHint);
         if ConsoleVerbosity>=0 then
           debugln(['Hint: (lazarus) [TMainIDE.DoBuildProject] compiler time in s: ',(Now-StartTime)*86400]);
         DoCallBuildingFinishedHandler(lihtProjectBuildingFinished, Self, Result=mrOk);