diff --git a/src/harness/harness.ts b/src/harness/harness.ts
index 25be918b22e..312b65a9eeb 100644
--- a/src/harness/harness.ts
+++ b/src/harness/harness.ts
@@ -556,7 +556,7 @@ module Harness {
                 },
                 getDefaultLibFilename: () => 'lib.d.ts',
                 writeFile: writeFile,
-                getCanonicalFileName: getCanonicalFileName,
+                getCanonicalFileName: ts.getCanonicalFileName,
                 useCaseSensitiveFileNames: () => sys.useCaseSensitiveFileNames
             }
         }
diff --git a/src/harness/projectsRunner.ts b/src/harness/projectsRunner.ts
index eddff4a9bd6..df228263e76 100644
--- a/src/harness/projectsRunner.ts
+++ b/src/harness/projectsRunner.ts
@@ -222,7 +222,7 @@ class ProjectRunner extends RunnerBase {
                     getDefaultLibFilename: () => "lib.d.ts",
                     writeFile: writeFile,
                     getCurrentDirectory: getCurrentDirectory,
-                    getCanonicalFileName: getCanonicalFileName,
+                    getCanonicalFileName: ts.getCanonicalFileName,
                     useCaseSensitiveFileNames: () => sys.useCaseSensitiveFileNames
                 };
             }
diff --git a/src/harness/rwcRunner.ts b/src/harness/rwcRunner.ts
index ce7fc34f7f5..30b9f9a80cf 100644
--- a/src/harness/rwcRunner.ts
+++ b/src/harness/rwcRunner.ts
@@ -111,7 +111,7 @@ module RWC {
                         },
                         getDefaultLibFilename: () => libPath,
                         writeFile: (fn, contents) => emitterIOHost.writeFile(fn, contents, false),
-                        getCanonicalFileName: getCanonicalFileName,
+                        getCanonicalFileName: ts.getCanonicalFileName,
                         useCaseSensitiveFileNames: () => sys.useCaseSensitiveFileNames
                     };
 
diff --git a/tests/webhost/webtsc.ts b/tests/webhost/webtsc.ts
index 80b0cfc33ba..21f3ad66b4f 100644
--- a/tests/webhost/webtsc.ts
+++ b/tests/webhost/webtsc.ts
@@ -1,4 +1,4 @@
-/// <reference path='..\..\src\compiler\prototype\tc.ts'/>
+/// <reference path='..\..\src\compiler\tc.ts'/>
 
 module TypeScript.WebTsc {
 
@@ -31,10 +31,11 @@ module TypeScript.WebTsc {
                 }
                 return s;
             },
-            writeFile(fileName: string, data: string): void {
+            writeFile(fileName: string, data: string): boolean {
                 var f = fso.CreateTextFile(fileName, true);
                 f.Write(data);
                 f.Close();
+                return true;
             },
             resolvePath(path: string): string {
                 return fso.GetAbsolutePathName(path);