diff --git a/workspaces/arborist/lib/arborist/build-ideal-tree.js b/workspaces/arborist/lib/arborist/build-ideal-tree.js
index ac3062928ebd8..920403d231d6d 100644
--- a/workspaces/arborist/lib/arborist/build-ideal-tree.js
+++ b/workspaces/arborist/lib/arborist/build-ideal-tree.js
@@ -463,7 +463,7 @@ module.exports = cls => class IdealTreeBuilder extends cls {
           }
           const dir = resolve(nm, name)
           const st = await lstat(dir)
-            .catch(/* istanbul ignore next */ er => null)
+            .catch(/* istanbul ignore next */ () => null)
           if (st && st.isSymbolicLink()) {
             const target = await readlink(dir)
             const real = resolve(dirname(dir), target).replace(/#/g, '%23')
@@ -1024,7 +1024,7 @@ This is a one-time fix-up, please be patient...
           for (const e of this.#problemEdges(placed)) {
             promises.push(() =>
               this.#fetchManifest(npa.resolve(e.name, e.spec, fromPath(placed, e)))
-                .catch(er => null)
+                .catch(() => null)
             )
           }
         },
@@ -1273,7 +1273,7 @@ This is a one-time fix-up, please be patient...
       })
   }
 
-  #linkFromSpec (name, spec, parent, edge) {
+  #linkFromSpec (name, spec, parent) {
     const realpath = spec.fetchSpec
     const { installLinks, legacyPeerDeps } = this
     return rpj(realpath + '/package.json').catch(() => ({})).then(pkg => {
diff --git a/workspaces/arborist/lib/arborist/isolated-reifier.js b/workspaces/arborist/lib/arborist/isolated-reifier.js
index 19e4e4a20d83a..1e60d0f696b26 100644
--- a/workspaces/arborist/lib/arborist/isolated-reifier.js
+++ b/workspaces/arborist/lib/arborist/isolated-reifier.js
@@ -212,7 +212,7 @@ module.exports = cls => class IsolatedReifier extends cls {
     return { edges, nodes }
   }
 
-  async [_createIsolatedTree] (idealTree) {
+  async [_createIsolatedTree] () {
     await this[_makeIdealGraph](this.options)
 
     const proxiedIdealTree = this.idealGraph
diff --git a/workspaces/arborist/lib/arborist/load-actual.js b/workspaces/arborist/lib/arborist/load-actual.js
index 3ab5f5983768d..81c1bd1132775 100644
--- a/workspaces/arborist/lib/arborist/load-actual.js
+++ b/workspaces/arborist/lib/arborist/load-actual.js
@@ -336,8 +336,8 @@ module.exports = cls => class ActualLoader extends cls {
       await this.#loadFSChildren(node.target)
       return Promise.all(
         [...node.target.children.entries()]
-          .filter(([name, kid]) => !did.has(kid.realpath))
-          .map(([name, kid]) => this.#loadFSTree(kid))
+          .filter(([, kid]) => !did.has(kid.realpath))
+          .map(([, kid]) => this.#loadFSTree(kid))
       )
     }
   }
diff --git a/workspaces/arborist/lib/arborist/load-virtual.js b/workspaces/arborist/lib/arborist/load-virtual.js
index 9b681a47a8358..d96d4adc88a70 100644
--- a/workspaces/arborist/lib/arborist/load-virtual.js
+++ b/workspaces/arborist/lib/arborist/load-virtual.js
@@ -283,7 +283,7 @@ module.exports = cls => class VirtualLoader extends cls {
     return node
   }
 
-  #loadLink (location, targetLoc, target, meta) {
+  #loadLink (location, targetLoc, target) {
     const path = resolve(this.path, location)
     const link = new Link({
       installLinks: this.installLinks,
diff --git a/workspaces/arborist/lib/arborist/reify.js b/workspaces/arborist/lib/arborist/reify.js
index 6240ea4ccd8e7..96704f6556e0d 100644
--- a/workspaces/arborist/lib/arborist/reify.js
+++ b/workspaces/arborist/lib/arborist/reify.js
@@ -136,7 +136,7 @@ module.exports = cls => class Reifier extends cls {
       // this is currently technical debt which will be resolved in a refactor
       // of Node/Link trees
       log.warn('reify', 'The "linked" install strategy is EXPERIMENTAL and may contain bugs.')
-      this.idealTree = await this[_createIsolatedTree](this.idealTree)
+      this.idealTree = await this[_createIsolatedTree]()
     }
     await this[_diffTrees]()
     await this[_reifyPackages]()
@@ -540,7 +540,7 @@ module.exports = cls => class Reifier extends cls {
       .map(([from, to]) => this[_renamePath](to, from))
     return promiseAllRejectLate(movePromises)
       // ignore subsequent rollback errors
-      .catch(er => {})
+      .catch(() => {})
       .then(timeEnd)
       .then(() => {
         throw er
@@ -608,7 +608,7 @@ module.exports = cls => class Reifier extends cls {
           continue
         }
         dirsChecked.add(d)
-        const st = await lstat(d).catch(er => null)
+        const st = await lstat(d).catch(() => null)
         // this can happen if we have a link to a package with a name
         // that the filesystem treats as if it is the same thing.
         // would be nice to have conditional istanbul ignores here...
@@ -779,7 +779,7 @@ module.exports = cls => class Reifier extends cls {
         return
       }
       await debug(async () => {
-        const st = await lstat(node.path).catch(e => null)
+        const st = await lstat(node.path).catch(() => null)
         if (st && !st.isDirectory()) {
           debug.log('unpacking into a non-directory', node)
           throw Object.assign(new Error('ENOTDIR: not a directory'), {
@@ -815,7 +815,7 @@ module.exports = cls => class Reifier extends cls {
   // if the node is optional, then the failure of the promise is nonfatal
   // just add it and its optional set to the trash list.
   [_handleOptionalFailure] (node, p) {
-    return (node.optional ? p.catch(er => {
+    return (node.optional ? p.catch(() => {
       const set = optionalSet(node)
       for (node of set) {
         log.verbose('reify', 'failed optional dependency', node.path)
diff --git a/workspaces/arborist/lib/dep-valid.js b/workspaces/arborist/lib/dep-valid.js
index 4afb5e47cf111..58656e8dbbad2 100644
--- a/workspaces/arborist/lib/dep-valid.js
+++ b/workspaces/arborist/lib/dep-valid.js
@@ -124,7 +124,7 @@ const linkValid = (child, requested, requestor) => {
   return isLink && relative(child.realpath, requested.fetchSpec) === ''
 }
 
-const tarballValid = (child, requested, requestor) => {
+const tarballValid = (child, requested) => {
   if (child.isLink) {
     return false
   }
diff --git a/workspaces/arborist/lib/inventory.js b/workspaces/arborist/lib/inventory.js
index 0885034666b50..7b3f294fdab2c 100644
--- a/workspaces/arborist/lib/inventory.js
+++ b/workspaces/arborist/lib/inventory.js
@@ -130,7 +130,7 @@ class Inventory extends Map {
     return super.get(node.location) === node
   }
 
-  set (k, v) {
+  set () {
     throw new Error('direct set() not supported, use inventory.add(node)')
   }
 }
diff --git a/workspaces/arborist/lib/query-selector-all.js b/workspaces/arborist/lib/query-selector-all.js
index d001a5cced83d..77640a3803d13 100644
--- a/workspaces/arborist/lib/query-selector-all.js
+++ b/workspaces/arborist/lib/query-selector-all.js
@@ -650,27 +650,27 @@ class Results {
 // operators for attribute selectors
 const attributeOperators = {
   // attribute value is equivalent
-  '=' ({ attr, value, insensitive }) {
+  '=' ({ attr, value }) {
     return attr === value
   },
   // attribute value contains word
-  '~=' ({ attr, value, insensitive }) {
+  '~=' ({ attr, value }) {
     return (attr.match(/\w+/g) || []).includes(value)
   },
   // attribute value contains string
-  '*=' ({ attr, value, insensitive }) {
+  '*=' ({ attr, value }) {
     return attr.includes(value)
   },
   // attribute value is equal or starts with
-  '|=' ({ attr, value, insensitive }) {
+  '|=' ({ attr, value }) {
     return attr.startsWith(`${value}-`)
   },
   // attribute value starts with
-  '^=' ({ attr, value, insensitive }) {
+  '^=' ({ attr, value }) {
     return attr.startsWith(value)
   },
   // attribute value ends with
-  '$=' ({ attr, value, insensitive }) {
+  '$=' ({ attr, value }) {
     return attr.endsWith(value)
   },
 }
diff --git a/workspaces/arborist/test/arborist/build-ideal-tree.js b/workspaces/arborist/test/arborist/build-ideal-tree.js
index 0e9264b849879..1b9940c5ae05a 100644
--- a/workspaces/arborist/test/arborist/build-ideal-tree.js
+++ b/workspaces/arborist/test/arborist/build-ideal-tree.js
@@ -136,7 +136,7 @@ t.test('fail on malformed package.json', t => {
   )
 })
 
-t.test('ignore mismatched engine for optional dependencies', async t => {
+t.test('ignore mismatched engine for optional dependencies', async () => {
   const path = resolve(fixtures, 'optional-engine-specification')
   await buildIdeal(path, {
     ...OPT,
diff --git a/workspaces/arborist/test/arborist/load-actual-ctor-throw.js b/workspaces/arborist/test/arborist/load-actual-ctor-throw.js
index 812b1667fa753..63d859b76e0ea 100644
--- a/workspaces/arborist/test/arborist/load-actual-ctor-throw.js
+++ b/workspaces/arborist/test/arborist/load-actual-ctor-throw.js
@@ -2,7 +2,7 @@ const rpj = require('read-package-json-fast')
 const t = require('tap')
 const rpjMock = Object.assign((...args) => rpj(...args), {
   ...rpj,
-  normalize: (...args) => {
+  normalize: () => {
     throw new Error('boom')
   },
 })
diff --git a/workspaces/arborist/test/arborist/rebuild.js b/workspaces/arborist/test/arborist/rebuild.js
index df383c6ce772c..2843155f2809e 100644
--- a/workspaces/arborist/test/arborist/rebuild.js
+++ b/workspaces/arborist/test/arborist/rebuild.js
@@ -438,7 +438,7 @@ t.test('rebuild node-gyp dependencies lacking both preinstall and install script
 t.test('do not rebuild node-gyp dependencies with gypfile:false', async t => {
   // use require-inject so we don't need an actual massive binary dep fixture
   const Arborist = t.mock('../../lib/arborist/index.js', {
-    '@npmcli/run-script': async opts => {
+    '@npmcli/run-script': async () => {
       throw new Error('should not run any scripts')
     },
   })
diff --git a/workspaces/arborist/test/arborist/reify.js b/workspaces/arborist/test/arborist/reify.js
index d0615add3540a..7600f2dabad8d 100644
--- a/workspaces/arborist/test/arborist/reify.js
+++ b/workspaces/arborist/test/arborist/reify.js
@@ -791,7 +791,7 @@ t.test('rollbacks', { buffered: false }, t => {
     const check = warningTracker()
     return t.rejects(a.reify({
       update: ['@isaacs/testing-bundledeps-parent'],
-    }).then(tree => 'it worked'), new Error('poop'))
+    }).then(() => 'it worked'), new Error('poop'))
     // eslint-disable-next-line promise/always-return
       .then(() => {
         const warnings = check()
@@ -843,7 +843,7 @@ t.test('rollbacks', { buffered: false }, t => {
     a[kLoadBundles] = (depth, bundlesByDepth) => {
       const kRN = Symbol.for('reifyNode')
       const reifyNode = a[kRN]
-      a[kRN] = node => {
+      a[kRN] = () => {
         a[kRN] = reifyNode
         return Promise.reject(new Error('poop'))
       }
@@ -861,7 +861,7 @@ t.test('rollbacks', { buffered: false }, t => {
     a[kUnpack] = () => {
       const kReify = Symbol.for('reifyNode')
       const reifyNode = a[kReify]
-      a[kReify] = node => {
+      a[kReify] = () => {
         a[kReify] = reifyNode
         return Promise.reject(new Error('poop'))
       }