From d9bfbfe3bef15f01defc5b0db20e2f0be9660db0 Mon Sep 17 00:00:00 2001
From: Ryan Cavanaugh <RyanCavanaugh@users.noreply.github.com>
Date: Thu, 24 May 2018 13:01:44 -0700
Subject: [PATCH] Fix tests run in parallel

---
 src/harness/unittests/tsbuild.ts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/harness/unittests/tsbuild.ts b/src/harness/unittests/tsbuild.ts
index a761e154898..1596cc4ec19 100644
--- a/src/harness/unittests/tsbuild.ts
+++ b/src/harness/unittests/tsbuild.ts
@@ -21,6 +21,7 @@ namespace ts {
             const host = new fakes.CompilerHost(fs);
             const builder = createSolutionBuilder(host, reportDiagnostic, { dry: false, force: false, verbose: false });
 
+            clearDiagnostics();
             fs.chdir("/src/tests");
             builder.buildProjects(["."]);
             assertDiagnosticMessages(/*empty*/);