9 files changed, 15 insertions, 10 deletions
diff --git a/js/console_test.ts b/js/console_test.ts
index cbfbdb52a..a87010220 100644
--- a/js/console_test.ts
+++ b/js/console_test.ts
@@ -67,7 +67,7 @@ test(function consoleTestStringifyCircular() {
   };
 
   nestedObj.o = circularObj;
-
+  // tslint:disable-next-line:max-line-length  
   const nestedObjExpected = `{ num: 1, bool: true, str: "a", method: [Function: method], asyncMethod: [AsyncFunction: asyncMethod], generatorMethod: [GeneratorFunction: generatorMethod], un: undefined, nu: null, arrowFunc: [Function: arrowFunc], extendedClass: Extended { a: 1, b: 2 }, nFunc: [Function], extendedCstr: [Function: Extended], o: { num: 2, bool: false, str: "b", method: [Function: method], un: undefined, nu: null, nested: [Circular], emptyObj: [object], arr: [object], baseClass: [object] } }`;
 
   assertEqual(stringify(1), "1");
@@ -88,11 +88,13 @@ test(function consoleTestStringifyCircular() {
   assertEqual(stringify(JSON), "{}");
   assertEqual(
     stringify(console),
+    // tslint:disable-next-line:max-line-length
     "Console { printFunc: [Function], log: [Function], debug: [Function], info: [Function], dir: [Function], warn: [Function], error: [Function], assert: [Function] }"
   );
 });
 
 test(function consoleTestStringifyWithDepth() {
+  // tslint:disable-next-line:no-any  
   const nestedObj: any = { a: { b: { c: { d: { e: { f: 42 } } } } } };
   assertEqual(
     stringifyArgs([nestedObj], { depth: 3 }),
diff --git a/js/make_temp_dir_test.ts b/js/make_temp_dir_test.ts
index 082c1e65d..551d58c26 100644
--- a/js/make_temp_dir_test.ts
+++ b/js/make_temp_dir_test.ts
@@ -6,7 +6,7 @@ testPerm({ write: true }, function makeTempDirSyncSuccess() {
   const dir1 = deno.makeTempDirSync({ prefix: "hello", suffix: "world" });
   const dir2 = deno.makeTempDirSync({ prefix: "hello", suffix: "world" });
   // Check that both dirs are different.
-  assert(dir1 != dir2);
+  assert(dir1 !== dir2);
   for (const dir of [dir1, dir2]) {
     // Check that the prefix and suffix are applied.
     const lastPart = dir.replace(/^.*[\\\/]/, "");
@@ -44,7 +44,7 @@ testPerm({ write: true }, async function makeTempDirSuccess() {
   const dir1 = await deno.makeTempDir({ prefix: "hello", suffix: "world" });
   const dir2 = await deno.makeTempDir({ prefix: "hello", suffix: "world" });
   // Check that both dirs are different.
-  assert(dir1 != dir2);
+  assert(dir1 !== dir2);
   for (const dir of [dir1, dir2]) {
     // Check that the prefix and suffix are applied.
     const lastPart = dir.replace(/^.*[\\\/]/, "");
diff --git a/js/net_test.ts b/js/net_test.ts
index 0b6db7afa..93ad6ee00 100644
--- a/js/net_test.ts
+++ b/js/net_test.ts
@@ -9,7 +9,7 @@ testPerm({ net: true }, function netListenClose() {
 });
 
 testPerm({ net: true }, async function netDialListen() {
-  let addr = "127.0.0.1:4500";
+  const addr = "127.0.0.1:4500";
   const listener = deno.listen("tcp", addr);
   listener.accept().then(async conn => {
     await conn.write(new Uint8Array([1, 2, 3]));
diff --git a/js/read_dir_test.ts b/js/read_dir_test.ts
index 43430ed00..cc63eb038 100644
--- a/js/read_dir_test.ts
+++ b/js/read_dir_test.ts
@@ -7,7 +7,7 @@ function assertSameContent(files: FileInfo[]) {
   let counter = 0;
 
   for (const file of files) {
-    if (file.name == "subdir") {
+    if (file.name === "subdir") {
       assert(file.isDirectory());
       counter++;
     }
diff --git a/js/timers_test.ts b/js/timers_test.ts
index 8d9eb0e1a..56cc56a9b 100644
--- a/js/timers_test.ts
+++ b/js/timers_test.ts
@@ -32,7 +32,7 @@ test(async function timeoutSuccess() {
 });
 
 test(async function timeoutArgs() {
-  let arg = 1;
+  const arg = 1;
   await new Promise((resolve, reject) => {
     setTimeout(
       (a, b, c) => {
diff --git a/tests/010_set_interval.ts b/tests/010_set_interval.ts
index f58cc3fcd..ee0641c5a 100644
--- a/tests/010_set_interval.ts
+++ b/tests/010_set_interval.ts
@@ -1,7 +1,7 @@
-const id = setInterval(function() {
+const id = setInterval(() => {
   console.log("test");
 }, 200);
 
-setTimeout(function() {
+setTimeout(() => {
   clearInterval(id);
 }, 500);
diff --git a/tests/cat.ts b/tests/cat.ts
index bede0d432..66df14794 100644
--- a/tests/cat.ts
+++ b/tests/cat.ts
@@ -2,8 +2,8 @@ import { stdout, open, copy, args } from "deno";
 
 async function main() {
   for (let i = 1; i < args.length; i++) {
-    let filename = args[i];
-    let file = await open(filename);
+    const filename = args[i];
+    const file = await open(filename);
     await copy(stdout, file);
   }
 }
diff --git a/tests/https_import.ts b/tests/https_import.ts
index faaf2175f..0a5cea3d1 100644
--- a/tests/https_import.ts
+++ b/tests/https_import.ts
@@ -1,5 +1,6 @@
 // TODO Use https://localhost:4555/ but we need more infrastructure to
 // support verifying self-signed certificates.
+// tslint:disable-next-line:max-line-length
 import { printHello } from "https://gist.githubusercontent.com/ry/f12b2aa3409e6b52645bc346a9e22929/raw/79318f239f51d764384a8bded8d7c6a833610dde/print_hello.ts";
 
 printHello();
diff --git a/tools/lint.py b/tools/lint.py
index e5a4f1690..2f38da2e8 100755
--- a/tools/lint.py
+++ b/tools/lint.py
@@ -17,4 +17,6 @@ run([
     "python", cpplint, "--filter=-build/include_subdir", "--repository=src",
     "--extensions=cc,h", "--recursive", "src/."
 ])
+
 run(["node", tslint, "-p", ".", "--exclude", "**/gen/**/*.ts"])
+run(["node", tslint, "./js/**/*_test.ts", "./tests/**/*.ts", "--exclude", "**/gen/**/*.ts"])