diff --git a/src/blocks/scratch3_looks.js b/src/blocks/scratch3_looks.js
index 3903dd1a..36ad5de5 100644
--- a/src/blocks/scratch3_looks.js
+++ b/src/blocks/scratch3_looks.js
@@ -1,6 +1,5 @@
 const Cast = require('../util/cast');
 const Clone = require('../util/clone');
-const RenderedTarget = require('../sprites/rendered-target');
 const uid = require('../util/uid');
 const StageLayering = require('../engine/stage-layering');
 const getMonitorIdForBlockWithArgs = require('../util/get-monitor-id');
diff --git a/src/cli/index.js b/src/cli/index.js
index 525f01b5..92541162 100644
--- a/src/cli/index.js
+++ b/src/cli/index.js
@@ -1,6 +1,7 @@
 const fs = require('fs');
 const VirtualMachine = require('../index');
 
+/* eslint-env node */
 /* eslint-disable no-console */
 
 const file = process.argv[2];
diff --git a/src/dispatch/worker-dispatch.js b/src/dispatch/worker-dispatch.js
index 0cc18b34..f413e6f3 100644
--- a/src/dispatch/worker-dispatch.js
+++ b/src/dispatch/worker-dispatch.js
@@ -63,7 +63,9 @@ class WorkerDispatch extends SharedDispatch {
             log.warn(`Worker dispatch replacing existing service provider for ${service}`);
         }
         this.services[service] = provider;
-        return this.waitForConnection.then(() => this._remoteCall(centralDispatchService, 'dispatch', 'setService', service));
+        return this.waitForConnection.then(() => (
+            this._remoteCall(centralDispatchService, 'dispatch', 'setService', service)
+        ));
     }
 
     /**
diff --git a/src/engine/runtime.js b/src/engine/runtime.js
index 1dd6f11e..5ac87933 100644
--- a/src/engine/runtime.js
+++ b/src/engine/runtime.js
@@ -2495,6 +2495,7 @@ class Runtime extends EventEmitter {
         this.emit(Runtime.STAGE_SIZE_CHANGED, width, height);
     }
 
+    // eslint-disable-next-line no-unused-vars
     setInEditor (inEditor) {
         // no-op
     }
diff --git a/src/extensions/scratch3_pen/index.js b/src/extensions/scratch3_pen/index.js
index 965a3ed8..47e0a5d4 100644
--- a/src/extensions/scratch3_pen/index.js
+++ b/src/extensions/scratch3_pen/index.js
@@ -6,7 +6,6 @@ const Clone = require('../../util/clone');
 const Color = require('../../util/color');
 const formatMessage = require('format-message');
 const MathUtil = require('../../util/math-util');
-const RenderedTarget = require('../../sprites/rendered-target');
 const log = require('../../util/log');
 const StageLayering = require('../../engine/stage-layering');
 
diff --git a/src/serialization/tw-compress-sb3.js b/src/serialization/tw-compress-sb3.js
index 83d65e16..63c4aed3 100644
--- a/src/serialization/tw-compress-sb3.js
+++ b/src/serialization/tw-compress-sb3.js
@@ -30,17 +30,15 @@ class Pool {
         entries.sort((a, b) => b[1] - a[1]);
 
         let i = 0;
-        let newId;
         for (const entry of entries) {
             const oldId = entry[0];
-            while (true) {
+
+            let newId = generateId(i);
+            while (this.skippedIds.has(newId)) {
+                i++;
                 newId = generateId(i);
-                if (this.skippedIds.has(newId)) {
-                    i++;
-                } else {
-                    break;
-                }
             }
+
             this.generatedIds.set(oldId, newId);
             i++;
         }
diff --git a/test/fixtures/execute/tw-generate-comparison-matrix-inline.js b/test/fixtures/execute/tw-generate-comparison-matrix-inline.js
index 14c97551..2b1b25ed 100644
--- a/test/fixtures/execute/tw-generate-comparison-matrix-inline.js
+++ b/test/fixtures/execute/tw-generate-comparison-matrix-inline.js
@@ -2,6 +2,8 @@ const fs = require('fs');
 const Cast = require('../../../src/util/cast');
 
 /*
+This is a command-line tool to generate the tw-comparison-matrix-inline test project.
+
 To use output:
 Blockly.Xml.domToWorkspace(
     new DOMParser().parseFromString(XML_GOES_HERE, 'text/xml').documentElement,
@@ -9,6 +11,8 @@ Blockly.Xml.domToWorkspace(
 );
 */
 
+/* eslint-disable no-console */
+
 const VALUES = [
     '0',
     '0.0',
diff --git a/test/unit/engine_runtime.js b/test/unit/engine_runtime.js
index e8e67679..f2a696af 100644
--- a/test/unit/engine_runtime.js
+++ b/test/unit/engine_runtime.js
@@ -273,4 +273,3 @@ test('Clock is reset on runtime dispose', t => {
     t.ok(c.projectTimer() === 0);
     t.end();
 });
-
diff --git a/test/unit/tw_compress.js b/test/unit/tw_compress.js
index 223a8e8d..d865b47b 100644
--- a/test/unit/tw_compress.js
+++ b/test/unit/tw_compress.js
@@ -94,28 +94,25 @@ test('handles type INPUT_DIFF_BLOCK_SHADOW (3) compressed inputs', t => {
 
 test('all IDs unique', t => {
     const soup = 'abcdefghjijklmnopqstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ123456789';
-    for (const [
-        variableSoup,
-        listSoup,
-        broadcastSoup
-    ] of [
+    const items = [
         [soup, '', ''],
         ['', soup, ''],
-        ['', '', soup],
-    ]) {
+        ['', '', soup]
+    ];
+    for (const [variableSoup, listSoup, broadcastSoup] of items) {
         const data = {
             targets: [
                 {
                     isStage: true,
                     name: 'Stage',
                     variables: Object.fromEntries(
-                        variableSoup.split('').map((id) => [id, [id, 0]])
+                        variableSoup.split('').map(id => [id, [id, 0]])
                     ),
                     lists: Object.fromEntries(
-                        listSoup.split('').map((id) => [id, [id, []]])
+                        listSoup.split('').map(id => [id, [id, []]])
                     ),
                     broadcasts: Object.fromEntries(
-                        broadcastSoup.split('').map((id) => [id, id])
+                        broadcastSoup.split('').map(id => [id, id])
                     ),
                     blocks: {
                         'CmRa^i]o}QL77;hk:54o': {