diff --git a/.eslintrc b/.eslintrc
index b77551ca6e6..e61f20d6871 100644
--- a/.eslintrc
+++ b/.eslintrc
@@ -42,7 +42,6 @@
         "@typescript-eslint/no-object-literal-type-assertion": "off",
         "@typescript-eslint/no-parameter-properties": "off",
         "@typescript-eslint/no-this-alias": "error",
-        "@typescript-eslint/no-triple-slash-reference": "off",
         "@typescript-eslint/no-unnecessary-qualifier": "error",
         "@typescript-eslint/no-unnecessary-type-assertion": "error",
         "@typescript-eslint/no-use-before-define": "off",
@@ -53,6 +52,7 @@
         "@typescript-eslint/prefer-namespace-keyword": "error",
         "semi": "off",
         "@typescript-eslint/semi": "error",
+        "@typescript-eslint/triple-slash-reference": "error",
         "@typescript-eslint/type-annotation-spacing": "error",
         "@typescript-eslint/unified-signatures": "error",
 
diff --git a/src/lib/importes5.d.ts b/src/lib/importes5.d.ts
deleted file mode 100644
index 872bf0a1bed..00000000000
--- a/src/lib/importes5.d.ts
+++ /dev/null
@@ -1 +0,0 @@
-/// <reference path="lib.es5.d.ts" />
diff --git a/src/testRunner/parallel/shared.ts b/src/testRunner/parallel/shared.ts
index a98f62abdbe..bfcef09b4de 100644
--- a/src/testRunner/parallel/shared.ts
+++ b/src/testRunner/parallel/shared.ts
@@ -1,5 +1,3 @@
-/// <reference path="./host.ts" />
-/// <reference path="./worker.ts" />
 namespace Harness.Parallel {
     export interface RunnerTask {
         runner: TestRunnerKind;
@@ -87,4 +85,4 @@ namespace Harness.Parallel {
         global.it.skip = global.xit = global.xspecify = ts.noop as Mocha.PendingTestFunction;
         global.it.only = ts.noop as Mocha.ExclusiveTestFunction;
     }
-}
\ No newline at end of file
+}