diff --git a/_tests/testRunner.ts b/_tests/testRunner.ts
index 92215bc30..ecda63e7a 100644
--- a/_tests/testRunner.ts
+++ b/_tests/testRunner.ts
@@ -75,6 +75,8 @@ function runTests(testFiles) {
         cfg.tsc,
 		[testFiles[testIndex]],
         (ExecResult) => {
+            console.log(ExecResult.stderr);
+
             var lib = getLibDirectory(testFiles[testIndex]);
 
             cache_visited_libs[lib] = true;