don't depend on installed F# for running tests.

build.fsx

@@ -169,6 +169,29 @@ let testProjects =
   [ "FSharp.CodeFormat.Tests"; "FSharp.Literate.Tests";
     "FSharp.Markdown.Tests"; "FSharp.MetadataFormat.Tests" ]
 
+Target "WorkaroundInstalledFSharp4_3" (fun _ ->
+    // Travis has FSharp 4.3 installed and we need 4.4 to execute the tests
+    // Because FSC always prefers a local FSharp.Core over the installed one
+    // We just copy it to the nunit-runner
+    [ "FSharp.Core.dll"; "FSharp.Core.optdata"; "FSharp.Core.sigdata" ]
+    |> Seq.iter (fun f ->
+        let source = "packages/FAKE/tools" @@ f
+        let dest1 = "packages/NUnit.Runners/tools" @@ f
+        let dest2 = "tests/FSharp.Literate.Tests/bin/Release"
+        printfn "Copying %s to %s" source dest1
+        printfn "Copying %s to %s" source dest2
+        try
+            System.IO.File.Copy(source, dest1, true)
+            System.IO.File.Copy(source, dest2, true)
+        with e -> printfn "failed to copy: %s" e.Message)
+)
+
+Target "PreRunTests" <| ignore
+
+"BuildTests"
+  ==> "WorkaroundInstalledFSharp4_3"
+  ==> "PreRunTests"
+
 Target "RunTests" <| ignore
 
 // For each test project file, generate a new "RunTest_Xyz" which
@@ -184,7 +207,7 @@ for name in testProjects do
                 Framework = "4.0"
                 OutputFile = "TestResults.xml" })
     taskName ==> "RunTests" |> ignore
-    "BuildTests" ==> taskName |> ignore
+    "PreRunTests" ==> taskName |> ignore
 
 // --------------------------------------------------------------------------------------
 // Build a NuGet package

tests/FSharp.Literate.Tests/Tests.fs

@@ -39,7 +39,7 @@ do
 
     // Test that everything works
     Logging.infof "FSharp.Formatting Logging setup!"
-    Yaaf.FSharp.Scripting.Log.infof "Yaaf.FSharp.Scripting Logging setup!"
+    Yaaf.FSharp.Scripting.Log.infof "Yaaf.FSharp.Scripting Logging setup (BaseDirectory: %s)!" System.AppDomain.CurrentDomain.BaseDirectory
   with e ->
     printfn "FSharp.Formatting Logging setup failed: %A" e