diff --git a/src/Visp.Compiler/Syntax/LexHelpers.fs b/src/Visp.Compiler/Syntax/LexHelpers.fs
index 5e05a86..4ac3580 100644
--- a/src/Visp.Compiler/Syntax/LexHelpers.fs
+++ b/src/Visp.Compiler/Syntax/LexHelpers.fs
@@ -468,7 +468,7 @@ let symbolOrKeywordToken (args: LexArgs) (lexbuf: FSharp.Text.Lexing.LexBuffer<_
                 filename |> System.IO.Path.GetFullPath |> System.IO.Path.GetDirectoryName
 
         let dirname =
-            if Syntax.SyntaxWriteUtilThreadStatics.NormalizeLineEndings then
+            if Syntax.SyntaxWriteUtilThreadStatics.RunningTests then
                 dirname.Replace('\\', '/')
             else
                 dirname
diff --git a/src/Visp.Compiler/Syntax/Syntax.fs b/src/Visp.Compiler/Syntax/Syntax.fs
index c92f79b..f1403b5 100644
--- a/src/Visp.Compiler/Syntax/Syntax.fs
+++ b/src/Visp.Compiler/Syntax/Syntax.fs
@@ -113,11 +113,11 @@ type SynStringKind =
 
 type SyntaxWriteUtilThreadStatics =
     [<System.ThreadStatic; DefaultValue>]
-    static val mutable private normalizeLineEndings: bool
+    static val mutable private runningTests: bool
 
-    static member NormalizeLineEndings
-        with get () = SyntaxWriteUtilThreadStatics.normalizeLineEndings
-        and set v = SyntaxWriteUtilThreadStatics.normalizeLineEndings <- v
+    static member RunningTests
+        with get () = SyntaxWriteUtilThreadStatics.runningTests
+        and set v = SyntaxWriteUtilThreadStatics.runningTests <- v
 
 module StringWriterUtils =
     let inline writeDebugStringType (name: string) (text: string) kind range =
@@ -129,7 +129,7 @@ module StringWriterUtils =
 
         for ch in text do
             match ch with
-            | '\r' when SyntaxWriteUtilThreadStatics.NormalizeLineEndings -> ()
+            | '\r' when SyntaxWriteUtilThreadStatics.RunningTests -> ()
             | it -> ignore (sb.Append it)
 
         sb.Append "\", " |> ignore
@@ -184,7 +184,14 @@ type SynConst =
         | Char it -> sprintf "Char %A" it
         | Decimal it -> sprintf "Decimal %A" it
         | UserNum(va, su) -> sprintf "UserNum (%s, %s)" va su
-        | SourceIdentifier(va, su, _) -> sprintf "SourceIdentifier (%s, %s)" va su
+        | SourceIdentifier(va, su, _) ->
+            if SyntaxWriteUtilThreadStatics.RunningTests then
+                match va with
+                | "__SOURCE_DIRECTORY__" ->
+                    sprintf "SourceIdentifier (\"%s\", \"%s\")" va (System.IO.Path.GetFileName su)
+                | _ -> sprintf "SourceIdentifier (\"%s\", \"%s\")" va su
+            else
+                sprintf "SourceIdentifier (%s, %s)" va su
         | String(text, k, r) -> StringWriterUtils.writeDebugStringType "String" text k r
 
 type SynTyped = SynTyped of name: SynSymbol * argtype: SynType * range: range
diff --git a/tests/Visp.Compiler.UnitTests/TestUtils.fs b/tests/Visp.Compiler.UnitTests/TestUtils.fs
index b2c136d..205c097 100644
--- a/tests/Visp.Compiler.UnitTests/TestUtils.fs
+++ b/tests/Visp.Compiler.UnitTests/TestUtils.fs
@@ -52,7 +52,7 @@ let runTokenTest (name: string) =
         try
             let parsed = CoreParser.debugLexFile path
             let nameParam = name.Replace('/', '_').Replace('\\', '_')
-            Syntax.SyntaxWriteUtilThreadStatics.NormalizeLineEndings <- true
+            Syntax.SyntaxWriteUtilThreadStatics.RunningTests <- true
             let output = parsed |> String.concat "\n"
             return! verify output "token-snapshots" nameParam
         with :? ParseHelpers.SyntaxError as syn ->
@@ -69,7 +69,7 @@ let runStructuredOutputTest (name: string) =
 
             let nameParam = name.Replace('/', '_').Replace('\\', '_')
 
-            Syntax.SyntaxWriteUtilThreadStatics.NormalizeLineEndings <- true
+            Syntax.SyntaxWriteUtilThreadStatics.RunningTests <- true
 
             let output = (sprintf "%120A" parsed).Replace("\\r\\n", "\\n").Replace("\r\n", "\n")
 
diff --git a/tests/Visp.Compiler.UnitTests/parsing-snapshots/tests_parsing_keyword-strings-0.structured output.verified.txt b/tests/Visp.Compiler.UnitTests/parsing-snapshots/tests_parsing_keyword-strings-0.structured output.verified.txt
index ce21a7b..7756d7e 100644
--- a/tests/Visp.Compiler.UnitTests/parsing-snapshots/tests_parsing_keyword-strings-0.structured output.verified.txt	
+++ b/tests/Visp.Compiler.UnitTests/parsing-snapshots/tests_parsing_keyword-strings-0.structured output.verified.txt	
@@ -6,17 +6,15 @@
              [FunctionCall
                 (Symbol (SynSymbol printfn),
                  [Const (String ("Line: %s", Regular, (9,13--9,23)), (9,13--9,23));
-                  Const (SourceIdentifier (__LINE__, 9), (9,24--9,32))], (9,5--9,32));
+                  Const (SourceIdentifier ("__LINE__", "9"), (9,24--9,32))], (9,5--9,32));
               FunctionCall
                 (Symbol (SynSymbol printfn),
                  [Const (String ("Source Directory: %s", Regular, (10,13--10,35)), (10,13--10,35));
-                  Const
-                    (SourceIdentifier (__SOURCE_DIRECTORY__, {SolutionDirectory}visp/tests/parsing),
-                     (10,36--10,56))], (10,5--10,56));
+                  Const (SourceIdentifier ("__SOURCE_DIRECTORY__", "parsing"), (10,36--10,56))], (10,5--10,56));
               FunctionCall
                 (Symbol (SynSymbol printfn),
                  [Const (String ("Source File: %s", Regular, (11,13--11,30)), (11,13--11,30));
-                  Const (SourceIdentifier (__SOURCE_FILE__, keyword-strings-0.visp), (11,31--11,46))], (11,5--11,46))],
+                  Const (SourceIdentifier ("__SOURCE_FILE__", "keyword-strings-0.visp"), (11,31--11,46))], (11,5--11,46))],
              None, (8,1--11,47)), (8,0--12,1));
        Expr
          (LetOrUse