diff --git a/src/harness/harness.ts b/src/harness/harness.ts
index 5cde3ad364..097340082e 100644
--- a/src/harness/harness.ts
+++ b/src/harness/harness.ts
@@ -1415,7 +1415,15 @@ module Harness {
                 assert.equal(markedErrorCount, fileErrors.length, "count of errors in " + inputFile.unitName);
             });
 
-            assert.equal(totalErrorsReported, diagnostics.length, "total number of errors");
+            let numLibraryDiagnostics = ts.countWhere(diagnostics, diagnostic => {
+                return diagnostic.file && (isLibraryFile(diagnostic.file.fileName) || isBuiltFile(diagnostic.file.fileName));
+            });
+
+            let numTest262HarnessDiagnostics = ts.countWhere(diagnostics, diagnostic => {
+                // Count an error generated from tests262-harness folder.This should only apply for test262
+                return diagnostic.file && diagnostic.file.fileName.indexOf("test262-harness") >= 0;
+            });
+
             return minimalDiagnosticsToString(diagnostics) +
                 Harness.IO.newLine() + Harness.IO.newLine() + outputLines.join("\r\n");
         }
diff --git a/src/harness/rwcRunner.ts b/src/harness/rwcRunner.ts
index cf748c3070..ea6f7b7ebb 100644
--- a/src/harness/rwcRunner.ts
+++ b/src/harness/rwcRunner.ts
@@ -19,12 +19,6 @@ module RWC {
         }
     }
 
-    let defaultLibPath = ts.sys.resolvePath("built/local/lib.d.ts");
-    let defaultLib = {
-        unitName: ts.normalizePath(defaultLibPath),
-        content: Harness.IO.readFile(defaultLibPath)
-    };
-
     export function runRWCTest(jsonPath: string) {
         describe("Testing a RWC project: " + jsonPath, () => {
             let inputFiles: { unitName: string; content: string; }[] = [];
@@ -72,6 +66,11 @@ module RWC {
                 });
 
                 if (!useCustomLibraryFile) {
+                    let defaultLibPath = ts.sys.resolvePath("built/local/lib.d.ts");
+                    let defaultLib = {
+                        unitName: ts.normalizePath(defaultLibPath),
+                        content: Harness.IO.readFile(defaultLibPath)
+                    };
                     inputFiles.push(defaultLib);
                 }