diff --git a/.eslintrc b/.eslintrc
index a838680b..e0c2b582 100644
--- a/.eslintrc
+++ b/.eslintrc
@@ -329,7 +329,7 @@
 
         // disallow use of chained assignment expressions
         // https://eslint.org/docs/rules/no-multi-assign
-        // "no-multi-assign": ["error"],
+        "no-multi-assign": ["error"],
 
         // disallow multiple empty lines and only one newline at the end
         "no-multiple-empty-lines": ["error", { max: 2, maxEOF: 0 }],
diff --git a/core/des.js b/core/des.js
index 653f0808..8e24fcc3 100644
--- a/core/des.js
+++ b/core/des.js
@@ -152,7 +152,8 @@ export default function DES(passwd) {
     for (let i = 0; i < 16; ++i) {
       const m = i << 1;
       const n = m + 1;
-      kn[m] = kn[n] = 0;
+      kn[m] = 0;
+      kn[n] = 0;
       for (let o = 28; o < 59; o += 28) {
         for (let j = o - 28; j < o; ++j) {
           const l = j + totrot[i];
diff --git a/core/display.js b/core/display.js
index d5784122..229a5a24 100644
--- a/core/display.js
+++ b/core/display.js
@@ -300,8 +300,10 @@ export default class Display {
           vx, vy, w, h);
       }
 
-      this._damageBounds.left = this._damageBounds.top = 65535;
-      this._damageBounds.right = this._damageBounds.bottom = 0;
+      this._damageBounds.top = 65535;
+      this._damageBounds.left = 65535;
+      this._damageBounds.bottom = 0;
+      this._damageBounds.right = 0;
     }
   }
 
diff --git a/core/util/logging.js b/core/util/logging.js
index 29347529..61ac6964 100644
--- a/core/util/logging.js
+++ b/core/util/logging.js
@@ -24,7 +24,10 @@ export function init_logging(level) {
     _log_level = level;
   }
 
-  Debug = Info = Warn = Error = () => {};
+  Debug = () => {};
+  Info = () => {};
+  Warn = () => {};
+  Error = () => {};
 
   if (typeof window.console !== 'undefined') {
     /* eslint-disable no-console, no-fallthrough */
diff --git a/tests/test.display.js b/tests/test.display.js
index 9d4257f0..e3de22cb 100644
--- a/tests/test.display.js
+++ b/tests/test.display.js
@@ -138,7 +138,8 @@ describe('Display/Canvas Helper', function () {
       const expected = [];
       for (let i = 0; i < 4 * 2 * 2; i += 4) {
         expected[i] = 0xff;
-        expected[i + 1] = expected[i + 2] = 0;
+        expected[i + 1] = 0;
+        expected[i + 2] = 0;
         expected[i + 3] = 0xff;
       }
       expect(display).to.have.displayed(new Uint8Array(expected));
@@ -302,7 +303,8 @@ describe('Display/Canvas Helper', function () {
       const expected = [];
       for (let i = 0; i < 4 * display._fb_width * display._fb_height; i += 4) {
         expected[i] = 0xff;
-        expected[i + 1] = expected[i + 2] = 0;
+        expected[i + 1] = 0;
+        expected[i + 2] = 0;
         expected[i + 3] = 0xff;
       }
       expect(display).to.have.displayed(new Uint8Array(expected));
diff --git a/tests/test.rfb.js b/tests/test.rfb.js
index 115ccc90..ddcd3cb8 100644
--- a/tests/test.rfb.js
+++ b/tests/test.rfb.js
@@ -55,7 +55,8 @@ describe('Remote Frame Buffer Protocol Client', function () {
   after(FakeWebSocket.restore);
 
   before(function () {
-    this.clock = clock = sinon.useFakeTimers();
+    clock = sinon.useFakeTimers();
+    this.clock = clock;
     // sinon doesn't support this yet
     raf = window.requestAnimationFrame;
     window.requestAnimationFrame = setTimeout;