diff --git a/src/harness/externalCompileRunner.ts b/src/harness/externalCompileRunner.ts
index 8ca0be807bf..9b8fc8c4fc5 100644
--- a/src/harness/externalCompileRunner.ts
+++ b/src/harness/externalCompileRunner.ts
@@ -1,67 +1,67 @@
-/// <reference path="harness.ts"/>
-/// <reference path="runnerbase.ts" />
-abstract class ExternalCompileRunnerBase extends RunnerBase {
-    abstract testDir: string;
-    public enumerateTestFiles() {
-        return Harness.IO.getDirectories(this.testDir);
-    }
-    /** Setup the runner's tests so that they are ready to be executed by the harness
-     *  The first test should be a describe/it block that sets up the harness's compiler instance appropriately
-     */
-    public initializeTests(): void {
-        // Read in and evaluate the test list
-        const testList = this.tests && this.tests.length ? this.tests : this.enumerateTestFiles();
-
-        describe(`${this.kind()} code samples`, () => {
-            for (const test of testList) {
-                this.runTest(test);
-            }
-        });
-    }
-    private runTest(directoryName: string) {
-        describe(directoryName, () => {
-            const cp = require("child_process");
-            const path = require("path");
-            const fs = require("fs");
-
-            it("should build successfully", () => {
-                const cwd = path.join(__dirname, "../../", this.testDir, directoryName);
-                const timeout = 600000; // 600s = 10 minutes
-                if (fs.existsSync(path.join(cwd, "package.json"))) {
-                    if (fs.existsSync(path.join(cwd, "package-lock.json"))) {
-                        fs.unlinkSync(path.join(cwd, "package-lock.json"));
-                    }
-                    const stdio = isWorker ? "pipe" : "inherit";
-                    const install = cp.spawnSync(`npm`, ["i"], { cwd, timeout, shell: true, stdio });
-                    if (install.status !== 0) throw new Error(`NPM Install for ${directoryName} failed!`);
-                }
-                Harness.Baseline.runBaseline(`${this.kind()}/${directoryName}.log`, () => {
-                    const result = cp.spawnSync(`node`, [path.join(__dirname, "tsc.js")], { cwd, timeout, shell: true });
-                    // tslint:disable-next-line:no-null-keyword
-                    return result.status === 0 ? null : `Exit Code: ${result.status}
-Standard output:
-${result.stdout.toString().replace(/\r\n/g, "\n")}
-
-
-Standard error:
-${result.stderr.toString().replace(/\r\n/g, "\n")}`;
-                });
-            });
-        });
-    }
-}
-
-class UserCodeRunner extends ExternalCompileRunnerBase {
-    public readonly testDir = "tests/cases/user/";
-    public kind(): TestRunnerKind {
-        return "user";
-    }
-}
-
-class DefinitelyTypedRunner extends ExternalCompileRunnerBase {
-    public readonly testDir = "../DefinitelyTyped/types/";
-    public workingDirectory = this.testDir;
-    public kind(): TestRunnerKind {
-        return "dt";
-    }
-}
+/// <reference path="harness.ts"/>
+/// <reference path="runnerbase.ts" />
+abstract class ExternalCompileRunnerBase extends RunnerBase {
+    abstract testDir: string;
+    public enumerateTestFiles() {
+        return Harness.IO.getDirectories(this.testDir);
+    }
+    /** Setup the runner's tests so that they are ready to be executed by the harness
+     *  The first test should be a describe/it block that sets up the harness's compiler instance appropriately
+     */
+    public initializeTests(): void {
+        // Read in and evaluate the test list
+        const testList = this.tests && this.tests.length ? this.tests : this.enumerateTestFiles();
+
+        describe(`${this.kind()} code samples`, () => {
+            for (const test of testList) {
+                this.runTest(test);
+            }
+        });
+    }
+    private runTest(directoryName: string) {
+        describe(directoryName, () => {
+            const cp = require("child_process");
+            const path = require("path");
+            const fs = require("fs");
+
+            it("should build successfully", () => {
+                const cwd = path.join(__dirname, "../../", this.testDir, directoryName);
+                const timeout = 600000; // 600s = 10 minutes
+                if (fs.existsSync(path.join(cwd, "package.json"))) {
+                    if (fs.existsSync(path.join(cwd, "package-lock.json"))) {
+                        fs.unlinkSync(path.join(cwd, "package-lock.json"));
+                    }
+                    const stdio = isWorker ? "pipe" : "inherit";
+                    const install = cp.spawnSync(`npm`, ["i"], { cwd, timeout, shell: true, stdio });
+                    if (install.status !== 0) throw new Error(`NPM Install for ${directoryName} failed!`);
+                }
+                Harness.Baseline.runBaseline(`${this.kind()}/${directoryName}.log`, () => {
+                    const result = cp.spawnSync(`node`, [path.join(__dirname, "tsc.js")], { cwd, timeout, shell: true });
+                    // tslint:disable-next-line:no-null-keyword
+                    return result.status === 0 && !result.stdout.length && !result.stderr.length ? null : `Exit Code: ${result.status}
+Standard output:
+${result.stdout.toString().replace(/\r\n/g, "\n")}
+
+
+Standard error:
+${result.stderr.toString().replace(/\r\n/g, "\n")}`;
+                });
+            });
+        });
+    }
+}
+
+class UserCodeRunner extends ExternalCompileRunnerBase {
+    public readonly testDir = "tests/cases/user/";
+    public kind(): TestRunnerKind {
+        return "user";
+    }
+}
+
+class DefinitelyTypedRunner extends ExternalCompileRunnerBase {
+    public readonly testDir = "../DefinitelyTyped/types/";
+    public workingDirectory = this.testDir;
+    public kind(): TestRunnerKind {
+        return "dt";
+    }
+}