diff --git a/.eslintrc.json b/.eslintrc.json
index 5257cf274b..50a1da790e 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -15,6 +15,7 @@
         "warnOnUnsupportedTypeScriptVersion": false,
         "sourceType": "unambiguous"
     },
+    "reportUnusedDisableDirectives": true,
     "rules": {
         "array-callback-return": "error",
         "arrow-body-style": "error",
diff --git a/static/js/billing/billing.js b/static/js/billing/billing.js
index c6b54b059a..3aff0a4eae 100644
--- a/static/js/billing/billing.js
+++ b/static/js/billing/billing.js
@@ -5,7 +5,6 @@ exports.initialize = function () {
 
     const stripe_key = $("#payment-method").data("key");
     const card_change_handler = StripeCheckout.configure({
-        // eslint-disable-line no-undef
         key: stripe_key,
         image: "/static/images/logo/zulip-icon-128x128.png",
         locale: "auto",
diff --git a/static/js/billing/upgrade.js b/static/js/billing/upgrade.js
index ab0f344f30..9bd127bdd1 100644
--- a/static/js/billing/upgrade.js
+++ b/static/js/billing/upgrade.js
@@ -4,7 +4,6 @@ exports.initialize = () => {
     helpers.set_tab("upgrade");
 
     const add_card_handler = StripeCheckout.configure({
-        // eslint-disable-line no-undef
         key: $("#autopay-form").data("key"),
         image: "/static/images/logo/zulip-icon-128x128.png",
         locale: "auto",
diff --git a/static/js/composebox_typeahead.js b/static/js/composebox_typeahead.js
index 541cc3ac37..543efe71c7 100644
--- a/static/js/composebox_typeahead.js
+++ b/static/js/composebox_typeahead.js
@@ -1,7 +1,7 @@
 "use strict";
 
 const autosize = require("autosize");
-const confirmDatePlugin = require("flatpickr/dist/plugins/confirmDate/confirmDate");
+const ConfirmDatePlugin = require("flatpickr/dist/plugins/confirmDate/confirmDate");
 const moment = require("moment");
 
 const pygments_data = require("../generated/pygments_data.json");
@@ -750,7 +750,7 @@ const show_flatpickr = (element, callback, default_timestamp) => {
         enableTime: true,
         clickOpens: false,
         defaultDate: default_timestamp,
-        plugins: [new confirmDatePlugin({})], // eslint-disable-line new-cap, no-undef
+        plugins: [new ConfirmDatePlugin({})],
         positionElement: element,
         dateFormat: "Z",
         formatDate: (date) => {
diff --git a/static/js/list_render.js b/static/js/list_render.js
index 2600c0e028..f0cffbc2b4 100644
--- a/static/js/list_render.js
+++ b/static/js/list_render.js
@@ -253,7 +253,6 @@ exports.create = function ($container, list, opts) {
             meta.sorting_function = sorting_function;
         } else if (typeof sorting_function === "string") {
             if (typeof prop === "string") {
-                /* eslint-disable max-len */
                 meta.sorting_function = meta.generic_sorting_functions[sorting_function](prop);
             } else {
                 meta.sorting_function = meta.sorting_functions.get(sorting_function);
diff --git a/static/js/popovers.js b/static/js/popovers.js
index 980b1b12ae..c7eb5f8257 100644
--- a/static/js/popovers.js
+++ b/static/js/popovers.js
@@ -1,7 +1,7 @@
 "use strict";
 
 const ClipboardJS = require("clipboard");
-const confirmDatePlugin = require("flatpickr/dist/plugins/confirmDate/confirmDate");
+const ConfirmDatePlugin = require("flatpickr/dist/plugins/confirmDate/confirmDate");
 const moment = require("moment");
 
 const render_actions_popover_content = require("../templates/actions_popover_content.hbs");
@@ -587,7 +587,7 @@ exports.render_actions_remind_popover = function (element, id) {
             clickOpens: false,
             defaultDate: moment().format(),
             minDate: "today",
-            plugins: [new confirmDatePlugin({})], // eslint-disable-line new-cap, no-undef
+            plugins: [new ConfirmDatePlugin({})],
         });
         current_actions_popover_elem = elt;
     }
diff --git a/static/js/types/stacktrace-gps/index.d.ts b/static/js/types/stacktrace-gps/index.d.ts
index e1a43fd93c..153f06e6a2 100644
--- a/static/js/types/stacktrace-gps/index.d.ts
+++ b/static/js/types/stacktrace-gps/index.d.ts
@@ -11,7 +11,6 @@ declare namespace StackTraceGPS {
     };
 }
 
-// eslint-disable-next-line no-redeclare
 declare class StackTraceGPS {
     constructor(options?: StackTraceGPS.StackTraceGPSOptions);
     pinpoint(stackframe: StackFrame): Promise<StackFrame>;
diff --git a/static/js/types/webpack4-bundle-tracker/index.d.ts b/static/js/types/webpack4-bundle-tracker/index.d.ts
index 9c3238ff12..e08c8b50b1 100644
--- a/static/js/types/webpack4-bundle-tracker/index.d.ts
+++ b/static/js/types/webpack4-bundle-tracker/index.d.ts
@@ -9,7 +9,6 @@ declare namespace BundleTracker {
     }
 }
 
-// eslint-disable-next-line no-redeclare
 declare class BundleTracker extends Plugin {
     constructor(options?: BundleTracker.Options);
 }
diff --git a/tools/lint b/tools/lint
index db14f42454..ecb82f5b36 100755
--- a/tools/lint
+++ b/tools/lint
@@ -53,7 +53,7 @@ def run() -> None:
                                   description="Standard CSS style and formatting linter "
                                   "(config: stylelint.config.js)")
     linter_config.external_linter('eslint', ['node', 'node_modules/.bin/eslint',
-                                             '--quiet', '--cache', '--ext', '.js,.ts'], ['js', 'ts'],
+                                             '--max-warnings=0', '--cache', '--ext', '.js,.ts'], ['js', 'ts'],
                                   fix_arg='--fix',
                                   description="Standard JavaScript style and formatting linter "
                                   "(config: .eslintrc).")
diff --git a/tools/message-screenshot.js b/tools/message-screenshot.js
index db05cff026..7586f3f214 100644
--- a/tools/message-screenshot.js
+++ b/tools/message-screenshot.js
@@ -1,5 +1,7 @@
 "use strict";
 
+/* global $, navigate */
+
 const path = require("path");
 
 const commander = require("commander");
@@ -56,8 +58,8 @@ async function run() {
         await page.waitForSelector(messageSelector);
         // remove unread marker and don't select message
         const marker = `#zfilt${options.messageId} .unread_marker`;
-        await page.evaluate((sel) => $(sel).remove(), marker); // eslint-disable-line no-undef
-        await page.evaluate(() => navigate.up()); // eslint-disable-line no-undef
+        await page.evaluate((sel) => $(sel).remove(), marker);
+        await page.evaluate(() => navigate.up());
         const messageBox = await page.$(messageSelector);
         const messageGroup = (await messageBox.$x(".."))[0];
         // Compute screenshot area, with some padding around the message group