diff --git a/examples/example-plugin/src/toBeEven.ts b/examples/example-plugin/src/toBeEven.ts
index 0f928397..ffbb965e 100644
--- a/examples/example-plugin/src/toBeEven.ts
+++ b/examples/example-plugin/src/toBeEven.ts
@@ -1,7 +1,6 @@
-import { Control, formatCompact, registerValidator } from 'earl'
+import { type Control, formatCompact, registerValidator } from 'earl'
 
 declare module 'earl' {
-  // eslint-disable-next-line @typescript-eslint/no-unused-vars
   interface Validators<T> {
     toBeEven(this: Validators<number>): void
   }
diff --git a/packages/e2e/test-esbuild/stack-traces.test.ts b/packages/e2e/test-esbuild/stack-traces.test.ts
index de8f49ee..3236e347 100644
--- a/packages/e2e/test-esbuild/stack-traces.test.ts
+++ b/packages/e2e/test-esbuild/stack-traces.test.ts
@@ -28,7 +28,7 @@ async function captureErrorAsync(fn: () => Promise<void>) {
 
 function getStack(error: Error) {
   const stack = utils.stackTraceFilter()(error.stack ?? '')
-  return Parser.parse({ stack } as any).map((x) => ({
+  return Parser.parse({ stack } as Error).map((x) => ({
     at: x.functionName,
     file: x.fileName,
   }))
diff --git a/packages/e2e/test-ts-node/stack-traces.test.ts b/packages/e2e/test-ts-node/stack-traces.test.ts
index de8f49ee..3236e347 100644
--- a/packages/e2e/test-ts-node/stack-traces.test.ts
+++ b/packages/e2e/test-ts-node/stack-traces.test.ts
@@ -28,7 +28,7 @@ async function captureErrorAsync(fn: () => Promise<void>) {
 
 function getStack(error: Error) {
   const stack = utils.stackTraceFilter()(error.stack ?? '')
-  return Parser.parse({ stack } as any).map((x) => ({
+  return Parser.parse({ stack } as Error).map((x) => ({
     at: x.functionName,
     file: x.fileName,
   }))
diff --git a/packages/earl/src/expect.ts b/packages/earl/src/expect.ts
index eca95d07..bd17ccb5 100644
--- a/packages/earl/src/expect.ts
+++ b/packages/earl/src/expect.ts
@@ -2,11 +2,10 @@ import { Control } from './Control.js'
 import { formatCompact } from './format/index.js'
 
 // to be overridden by plugins
-// eslint-disable-next-line @typescript-eslint/no-unused-vars
-export interface Validators<T> {}
+export type Validators<T> = {}
 
 // to be overridden by plugins
-export interface Matchers {}
+export type Matchers = {}
 
 export class Matcher {
   constructor(
diff --git a/packages/earl/src/format/FormatOptions.ts b/packages/earl/src/format/FormatOptions.ts
index 4f097453..0ac9c71f 100644
--- a/packages/earl/src/format/FormatOptions.ts
+++ b/packages/earl/src/format/FormatOptions.ts
@@ -31,7 +31,7 @@ export const DEFAULT_FORMAT_OPTIONS: FormatOptions = {
   ...DEFAULT_EQUALITY_OPTIONS,
   indentSize: 2,
   inline: false,
-  maxLineLength: Infinity,
+  maxLineLength: Number.POSITIVE_INFINITY,
   skipMatcherReplacement: false,
   requireStrictEquality: false,
 }
diff --git a/packages/earl/src/format/format.test.ts b/packages/earl/src/format/format.test.ts
index 42d965dc..2448511a 100644
--- a/packages/earl/src/format/format.test.ts
+++ b/packages/earl/src/format/format.test.ts
@@ -14,7 +14,7 @@ describe('format', () => {
     compareErrorStack: false,
     indentSize: 2,
     inline: false,
-    maxLineLength: Infinity,
+    maxLineLength: Number.POSITIVE_INFINITY,
     skipMatcherReplacement: false,
     requireStrictEquality: false,
   }
@@ -33,11 +33,11 @@ describe('format', () => {
         [0.2, null, '0.2'],
         [-3, null, '-3'],
         [1e50, null, '1e+50'],
-        [NaN, null, 'NaN'],
-        [NaN, NaN, 'NaN'],
-        [NaN, NaN, 'NaN (different)', { uniqueNaNs: true }],
-        [Infinity, null, 'Infinity'],
-        [-Infinity, null, '-Infinity'],
+        [Number.NaN, null, 'NaN'],
+        [Number.NaN, Number.NaN, 'NaN'],
+        [Number.NaN, Number.NaN, 'NaN (different)', { uniqueNaNs: true }],
+        [Number.POSITIVE_INFINITY, null, 'Infinity'],
+        [Number.NEGATIVE_INFINITY, null, '-Infinity'],
         [0, null, '0'],
         [-0, null, '0'],
         [-0, null, '-0', { minusZero: true }],
@@ -85,8 +85,8 @@ describe('format', () => {
       testCases: [
         [function a() {}, null, 'function a()'],
         [function a() {}, function a() {}, 'function a() (different)'],
-        [function () {}, null, 'function [anonymous]()'],
-        [function () {}, function () {}, 'function [anonymous]() (different)'],
+        [() => {}, null, 'function [anonymous]()'],
+        [() => {}, () => {}, 'function [anonymous]() (different)'],
         [function* foo() {}, null, 'function* foo()'],
         [function* foo() {}, function* foo() {}, 'function* foo() (different)'],
         [function* () {}, null, 'function* [anonymous]()'],
@@ -97,7 +97,6 @@ describe('format', () => {
         ],
         // This is eval-ed to avoid typescript transpiling it
         // With a higher target this wouldn't be necessary
-        // eslint-disable-next-line no-eval
         ...eval(`[
           [async function foo() {}, null, 'async function foo()'],
           [async function foo() {}, async function foo() {}, 'async function foo() (different)'],
@@ -126,7 +125,7 @@ describe('format', () => {
           'function x() (different) & {\n  a: 1\n}',
         ],
         [
-          Object.assign(function () {}, { a: 1 }),
+          Object.assign(() => {}, { a: 1 }),
           null,
           'function [anonymous]() & {\n  a: 1\n}',
         ],
diff --git a/packages/earl/src/format/formatCompact.test.ts b/packages/earl/src/format/formatCompact.test.ts
index c18e1eae..be6dc53e 100644
--- a/packages/earl/src/format/formatCompact.test.ts
+++ b/packages/earl/src/format/formatCompact.test.ts
@@ -13,9 +13,9 @@ describe('formatCompact', () => {
     [0.2, '0.2'],
     [-3, '-3'],
     [1e50, '1e+50'],
-    [NaN, 'NaN'],
-    [Infinity, 'Infinity'],
-    [-Infinity, '-Infinity'],
+    [Number.NaN, 'NaN'],
+    [Number.POSITIVE_INFINITY, 'Infinity'],
+    [Number.NEGATIVE_INFINITY, '-Infinity'],
     [BigInt(1), '1n'],
     [BigInt(123), '123n'],
     [BigInt(-123), '-123n'],
@@ -33,7 +33,7 @@ describe('formatCompact', () => {
     [undefined, 'undefined'],
     [true, 'true'],
     [false, 'false'],
-    [function () {}, 'function [anonymous]()'],
+    [() => {}, 'function [anonymous]()'],
     [function foo() {}, 'function foo()'],
     [class Foo {}, 'class Foo'],
     [class {}, 'class [anonymous]'],
diff --git a/packages/earl/src/format/formatNumber.ts b/packages/earl/src/format/formatNumber.ts
index c3f1fe37..eb869bf8 100644
--- a/packages/earl/src/format/formatNumber.ts
+++ b/packages/earl/src/format/formatNumber.ts
@@ -8,8 +8,8 @@ export function formatNumber(
 ) {
   if (Object.is(value, -0) && options.minusZero) {
     return toLine('-0')
-  } else if (Object.is(value, NaN)) {
-    if (options.uniqueNaNs && Object.is(sibling, NaN)) {
+  } else if (Object.is(value, Number.NaN)) {
+    if (options.uniqueNaNs && Object.is(sibling, Number.NaN)) {
       return toLine('NaN (different)')
     }
     return toLine('NaN')
diff --git a/packages/earl/src/format/formatUnknown.ts b/packages/earl/src/format/formatUnknown.ts
index 894c564d..c62556cd 100644
--- a/packages/earl/src/format/formatUnknown.ts
+++ b/packages/earl/src/format/formatUnknown.ts
@@ -87,7 +87,7 @@ export function formatUnknown(
   if (
     type === 'Error' &&
     options.inline &&
-    options.maxLineLength !== Infinity
+    options.maxLineLength !== Number.POSITIVE_INFINITY
   ) {
     return toLine(
       `${typeName ?? ''}(${formatString((value as Error).message, options)})`,
diff --git a/packages/earl/src/format/getComparedTypeName.ts b/packages/earl/src/format/getComparedTypeName.ts
index e62ae48e..f0f48814 100644
--- a/packages/earl/src/format/getComparedTypeName.ts
+++ b/packages/earl/src/format/getComparedTypeName.ts
@@ -57,14 +57,12 @@ function getPrototypeName(value: object) {
   return '[custom prototype]'
 }
 
-// eslint-disable-next-line @typescript-eslint/ban-types
 export function getFunctionTypeName(value: Function) {
   const type = getFunctionType(value)
   const name = value.name || '[anonymous]'
   return `${type} ${name}${type === 'class' ? '' : '()'}`
 }
 
-// eslint-disable-next-line @typescript-eslint/ban-types
 function getFunctionType(value: Function) {
   if (value.toString().startsWith('class')) {
     return 'class'
diff --git a/packages/earl/src/isEqual/isEqual.perf.test.ts b/packages/earl/src/isEqual/isEqual.perf.test.ts
index 130f939e..47784d07 100644
--- a/packages/earl/src/isEqual/isEqual.perf.test.ts
+++ b/packages/earl/src/isEqual/isEqual.perf.test.ts
@@ -29,7 +29,7 @@ describe('isEqual performance', function () {
     roles: ['User', 'Admin'],
   }
 
-  it('measure', function () {
+  it('measure', () => {
     const repeat = 5
     const iterations = 2000
     const testValue = [dataObject, dataObject, dataObject]
diff --git a/packages/earl/src/isEqual/isEqual.test.ts b/packages/earl/src/isEqual/isEqual.test.ts
index ca6fc758..e75d1db8 100644
--- a/packages/earl/src/isEqual/isEqual.test.ts
+++ b/packages/earl/src/isEqual/isEqual.test.ts
@@ -20,7 +20,7 @@ describe('isEqual', () => {
     minusZero: true,
     indentSize: 2,
     inline: true,
-    maxLineLength: Infinity,
+    maxLineLength: Number.POSITIVE_INFINITY,
     skipMatcherReplacement: true,
     requireStrictEquality: false,
   }
@@ -52,11 +52,11 @@ describe('isEqual', () => {
         [123.456, -123.456, false],
         [0, -0, true],
         [0, -0, false, { minusZero: true }],
-        [NaN, NaN, true],
-        [NaN, NaN, false, { uniqueNaNs: true }],
-        [Infinity, Infinity, true],
-        [Infinity, -Infinity, false],
-        [-Infinity, -Infinity, true],
+        [Number.NaN, Number.NaN, true],
+        [Number.NaN, Number.NaN, false, { uniqueNaNs: true }],
+        [Number.POSITIVE_INFINITY, Number.POSITIVE_INFINITY, true],
+        [Number.POSITIVE_INFINITY, Number.NEGATIVE_INFINITY, false],
+        [Number.NEGATIVE_INFINITY, Number.NEGATIVE_INFINITY, true],
       ],
     },
     {
@@ -119,9 +119,9 @@ describe('isEqual', () => {
             function* named() {},
             async function named() {},
             async function* named() {},
-            function () {},
+            () => {},
             function* () {},
-            async function () {},
+            async () => {},
             async function* () {},
           ]
           const testCases: TestCase[] = []
@@ -330,13 +330,8 @@ describe('isEqual', () => {
         ...(() => {
           class MyRegExp extends RegExp {}
           return [
-            [new RegExp('foo'), new MyRegExp('foo'), false],
-            [
-              new RegExp('foo'),
-              new MyRegExp('foo'),
-              true,
-              { ignorePrototypes: true },
-            ],
+            [/foo/, new MyRegExp('foo'), false],
+            [/foo/, new MyRegExp('foo'), true, { ignorePrototypes: true }],
             [new MyRegExp('foo'), new MyRegExp('foo'), true],
             [new MyRegExp('foo'), new MyRegExp('bar'), false],
             [
@@ -651,7 +646,7 @@ describe('isEqual', () => {
             ...equalityOptions,
             indentSize: 2,
             inline: false,
-            maxLineLength: Infinity,
+            maxLineLength: Number.POSITIVE_INFINITY,
             skipMatcherReplacement: false,
             requireStrictEquality: false,
           }
diff --git a/packages/earl/src/isEqual/isEqualNumber.ts b/packages/earl/src/isEqual/isEqualNumber.ts
index b57f100a..307e8b49 100644
--- a/packages/earl/src/isEqual/isEqualNumber.ts
+++ b/packages/earl/src/isEqual/isEqualNumber.ts
@@ -5,8 +5,8 @@ export function isEqualNumber(
   other: number,
   options: EqualityOptions,
 ) {
-  if (isNaN(value)) {
-    return options.uniqueNaNs ? false : isNaN(other)
+  if (Number.isNaN(value)) {
+    return options.uniqueNaNs ? false : Number.isNaN(other)
   } else if (value === 0) {
     return options.minusZero ? Object.is(value, other) : other === 0
   } else {
diff --git a/packages/earl/src/isEqual/isEqualObject.ts b/packages/earl/src/isEqual/isEqualObject.ts
index 4b4d99c4..a862fd5a 100644
--- a/packages/earl/src/isEqual/isEqualObject.ts
+++ b/packages/earl/src/isEqual/isEqualObject.ts
@@ -27,10 +27,10 @@ export function isEqualObject(
   for (let i = 0; i < keys.length; i++) {
     if (
       !isEqualUnknown(
-        // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+        // biome-ignore lint/style/noNonNullAssertion: We know that the key exists
         (value as any)[keys[i]!],
         valueStack,
-        // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+        // biome-ignore lint/style/noNonNullAssertion: We know that the key exists
         (other as any)[otherKeys[i]!],
         otherStack,
         options,
diff --git a/packages/earl/src/matchers/basic/a.test.ts b/packages/earl/src/matchers/basic/a.test.ts
index cd19a60f..c4707609 100644
--- a/packages/earl/src/matchers/basic/a.test.ts
+++ b/packages/earl/src/matchers/basic/a.test.ts
@@ -24,8 +24,10 @@ describe(a.name, () => {
 
     testMatcher(
       a(Number),
-      TEST_VALUES.filter((x) => typeof x === 'number' && !Number.isNaN(x)),
-      TEST_VALUES.filter((x) => typeof x !== 'number').concat(NaN),
+      TEST_VALUES.filter(
+        (x) => typeof x === 'number' && !Number.Number.isNaN(x),
+      ),
+      TEST_VALUES.filter((x) => typeof x !== 'number').concat(Number.NaN),
     )
   })
 
diff --git a/packages/earl/src/matchers/basic/a.ts b/packages/earl/src/matchers/basic/a.ts
index 8e5abc8a..110befd3 100644
--- a/packages/earl/src/matchers/basic/a.ts
+++ b/packages/earl/src/matchers/basic/a.ts
@@ -47,7 +47,7 @@ export function a(type: NewableOrPrimitive) {
     if (type === String) {
       return typeof value === 'string'
     } else if (type === Number) {
-      return typeof value === 'number' && !isNaN(value)
+      return typeof value === 'number' && !Number.isNaN(value)
     } else if (type === Boolean) {
       return typeof value === 'boolean'
     } else if (type === BigInt) {
diff --git a/packages/earl/src/matchers/numbers/between.test.ts b/packages/earl/src/matchers/numbers/between.test.ts
index faa36c77..0416c0a1 100644
--- a/packages/earl/src/matchers/numbers/between.test.ts
+++ b/packages/earl/src/matchers/numbers/between.test.ts
@@ -19,7 +19,7 @@ describe(between.name, () => {
         -Number.EPSILON,
         Number.NEGATIVE_INFINITY,
         Number.POSITIVE_INFINITY,
-        NaN,
+        Number.NaN,
         ...TEST_VALUES.filter(
           (x) => typeof x !== 'number' && typeof x !== 'bigint',
         ),
diff --git a/packages/earl/src/matchers/numbers/closeTo.test.ts b/packages/earl/src/matchers/numbers/closeTo.test.ts
index cdbed610..22785b4d 100644
--- a/packages/earl/src/matchers/numbers/closeTo.test.ts
+++ b/packages/earl/src/matchers/numbers/closeTo.test.ts
@@ -15,7 +15,7 @@ describe(closeTo.name, () => {
       5,
       123,
       -4,
-      NaN,
+      Number.NaN,
       ...TEST_VALUES.filter((x) => typeof x !== 'number'),
     ],
   )
diff --git a/packages/earl/src/matchers/numbers/greaterThan.test.ts b/packages/earl/src/matchers/numbers/greaterThan.test.ts
index 042441b9..7b0d9c57 100644
--- a/packages/earl/src/matchers/numbers/greaterThan.test.ts
+++ b/packages/earl/src/matchers/numbers/greaterThan.test.ts
@@ -9,7 +9,15 @@ describe(greaterThan.name, () => {
   describe('greaterThan(10)', () => {
     testMatcher(
       greaterThan(10),
-      [11, 10.5, 100, 12356.789, Infinity, BigInt(11), BigInt(100)],
+      [
+        11,
+        10.5,
+        100,
+        12356.789,
+        Number.POSITIVE_INFINITY,
+        BigInt(11),
+        BigInt(100),
+      ],
       [
         10,
         0,
@@ -19,8 +27,8 @@ describe(greaterThan.name, () => {
         9.998,
         5,
         -4,
-        NaN,
-        -Infinity,
+        Number.NaN,
+        Number.NEGATIVE_INFINITY,
         BigInt(10),
         BigInt(0),
         BigInt(-100),
diff --git a/packages/earl/src/matchers/numbers/greaterThanOrEqual.test.ts b/packages/earl/src/matchers/numbers/greaterThanOrEqual.test.ts
index 9c00dd93..62912466 100644
--- a/packages/earl/src/matchers/numbers/greaterThanOrEqual.test.ts
+++ b/packages/earl/src/matchers/numbers/greaterThanOrEqual.test.ts
@@ -15,7 +15,7 @@ describe(greaterThanOrEqual.name, () => {
         10.5,
         100,
         12356.789,
-        Infinity,
+        Number.POSITIVE_INFINITY,
         BigInt(10),
         BigInt(11),
         BigInt(100),
@@ -28,8 +28,8 @@ describe(greaterThanOrEqual.name, () => {
         9.998,
         5,
         -4,
-        NaN,
-        -Infinity,
+        Number.NaN,
+        Number.NEGATIVE_INFINITY,
         BigInt(0),
         BigInt(-100),
         ...TEST_VALUES.filter(
diff --git a/packages/earl/src/matchers/numbers/integer.test.ts b/packages/earl/src/matchers/numbers/integer.test.ts
index 14251eed..45005443 100644
--- a/packages/earl/src/matchers/numbers/integer.test.ts
+++ b/packages/earl/src/matchers/numbers/integer.test.ts
@@ -24,9 +24,9 @@ describe(integer.name, () => {
     [
       0.5,
       -1.2,
-      Infinity,
-      -Infinity,
-      NaN,
+      Number.POSITIVE_INFINITY,
+      Number.NEGATIVE_INFINITY,
+      Number.NaN,
       TEST_VALUES.filter((x) => typeof x !== 'number' && typeof x !== 'bigint'),
     ],
   )
diff --git a/packages/earl/src/matchers/numbers/lessThan.test.ts b/packages/earl/src/matchers/numbers/lessThan.test.ts
index 82474370..5464ea32 100644
--- a/packages/earl/src/matchers/numbers/lessThan.test.ts
+++ b/packages/earl/src/matchers/numbers/lessThan.test.ts
@@ -17,7 +17,7 @@ describe(lessThan.name, () => {
         -1,
         -100,
         -12356.789,
-        -Infinity,
+        Number.NEGATIVE_INFINITY,
         BigInt(9),
         BigInt(0),
         BigInt(-100),
@@ -26,8 +26,8 @@ describe(lessThan.name, () => {
         10,
         11,
         19.998,
-        NaN,
-        Infinity,
+        Number.NaN,
+        Number.POSITIVE_INFINITY,
         BigInt(10),
         BigInt(100),
         ...TEST_VALUES.filter(
diff --git a/packages/earl/src/matchers/numbers/lessThanOrEqual.test.ts b/packages/earl/src/matchers/numbers/lessThanOrEqual.test.ts
index 905f5894..dd0474b8 100644
--- a/packages/earl/src/matchers/numbers/lessThanOrEqual.test.ts
+++ b/packages/earl/src/matchers/numbers/lessThanOrEqual.test.ts
@@ -18,7 +18,7 @@ describe(lessThanOrEqual.name, () => {
         -1,
         -100,
         -12356.789,
-        -Infinity,
+        Number.NEGATIVE_INFINITY,
         BigInt(10),
         BigInt(9),
         BigInt(0),
@@ -27,8 +27,8 @@ describe(lessThanOrEqual.name, () => {
       [
         11,
         19.998,
-        NaN,
-        Infinity,
+        Number.NaN,
+        Number.POSITIVE_INFINITY,
         BigInt(100),
         ...TEST_VALUES.filter(
           (x) => typeof x !== 'number' && typeof x !== 'bigint',
diff --git a/packages/earl/src/matchers/numbers/safeInteger.test.ts b/packages/earl/src/matchers/numbers/safeInteger.test.ts
index 608523ce..827400f1 100644
--- a/packages/earl/src/matchers/numbers/safeInteger.test.ts
+++ b/packages/earl/src/matchers/numbers/safeInteger.test.ts
@@ -31,9 +31,9 @@ describe(safeInteger.name, () => {
       Number.MIN_SAFE_INTEGER * 2,
       BigInt(Number.MAX_SAFE_INTEGER) * BigInt(2),
       BigInt(Number.MIN_SAFE_INTEGER) * BigInt(2),
-      Infinity,
-      -Infinity,
-      NaN,
+      Number.POSITIVE_INFINITY,
+      Number.NEGATIVE_INFINITY,
+      Number.NaN,
       TEST_VALUES.filter((x) => typeof x !== 'number' && typeof x !== 'bigint'),
     ],
   )
diff --git a/packages/earl/src/mocks/mockFn.ts b/packages/earl/src/mocks/mockFn.ts
index a3c84c29..dacaaf86 100644
--- a/packages/earl/src/mocks/mockFn.ts
+++ b/packages/earl/src/mocks/mockFn.ts
@@ -61,17 +61,12 @@ export function mockFn<A extends any[], R>(
 
   mock[mockSymbol] = true
   mock.calls = [] as MockCall<any, any>[]
-  mock.isExhausted = function () {
-    return oneTimeOverrides.length === 0 && parameterOverrides.length === 0
-  }
+  mock.isExhausted = () =>
+    oneTimeOverrides.length === 0 && parameterOverrides.length === 0
 
-  mock.getOneTimeOverridesLength = function () {
-    return oneTimeOverrides.length
-  }
+  mock.getOneTimeOverridesLength = () => oneTimeOverrides.length
 
-  mock.getParameterOverridesLength = function () {
-    return parameterOverrides.length
-  }
+  mock.getParameterOverridesLength = () => parameterOverrides.length
 
   function runSpec(spec: Spec, args: any[]) {
     switch (spec.type) {
@@ -114,7 +109,7 @@ export function mockFn<A extends any[], R>(
     }
   }
 
-  mock.reset = function () {
+  mock.reset = () => {
     defaultSpec = { type: 'not-ready' }
     oneTimeOverrides = []
     parameterOverrides = []
@@ -124,56 +119,56 @@ export function mockFn<A extends any[], R>(
     }
   }
 
-  mock.clear = function () {
+  mock.clear = () => {
     mock.calls = []
   }
 
-  mock.returns = function (value: any) {
+  mock.returns = (value: any) => {
     defaultSpec = { type: 'return', value }
     return mock
   }
 
-  mock.returnsOnce = function (value: any) {
+  mock.returnsOnce = (value: any) => {
     oneTimeOverrides.push({ type: 'return', value })
     return mock
   }
 
-  mock.throws = function (error: any) {
+  mock.throws = (error: any) => {
     defaultSpec = { type: 'throw', error }
     return mock
   }
 
-  mock.throwsOnce = function (error: any) {
+  mock.throwsOnce = (error: any) => {
     oneTimeOverrides.push({ type: 'throw', error })
     return mock
   }
 
-  mock.executes = function (implementation: (...args: any[]) => any) {
+  mock.executes = (implementation: (...args: any[]) => any) => {
     defaultSpec = { type: 'exec', implementation }
     return mock
   }
 
-  mock.executesOnce = function (implementation: (...args: any[]) => any) {
+  mock.executesOnce = (implementation: (...args: any[]) => any) => {
     oneTimeOverrides.push({ type: 'exec', implementation })
     return mock
   }
 
-  mock.resolvesTo = function (value: any) {
+  mock.resolvesTo = (value: any) => {
     defaultSpec = { type: 'return', value: Promise.resolve(value) }
     return mock
   }
 
-  mock.resolvesToOnce = function (value: any) {
+  mock.resolvesToOnce = (value: any) => {
     oneTimeOverrides.push({ type: 'return', value: Promise.resolve(value) })
     return mock
   }
 
-  mock.rejectsWith = function (error: any) {
+  mock.rejectsWith = (error: any) => {
     defaultSpec = { type: 'lazy-return', value: () => Promise.reject(error) }
     return mock
   }
 
-  mock.rejectsWithOnce = function (error: any) {
+  mock.rejectsWithOnce = (error: any) => {
     oneTimeOverrides.push({
       type: 'lazy-return',
       value: () => Promise.reject(error),
@@ -181,43 +176,41 @@ export function mockFn<A extends any[], R>(
     return mock
   }
 
-  mock.given = function (...args: any[]) {
-    return {
-      returnsOnce(value: any) {
-        parameterOverrides.push({ args, spec: { type: 'return', value } })
-        return mock
-      },
-
-      throwsOnce(error: any) {
-        parameterOverrides.push({ args, spec: { type: 'throw', error } })
-        return mock
-      },
-
-      executesOnce(implementation: (...args: any[]) => any) {
-        parameterOverrides.push({
-          args,
-          spec: { type: 'exec', implementation },
-        })
-        return mock
-      },
-
-      resolvesToOnce(value: any) {
-        parameterOverrides.push({
-          args,
-          spec: { type: 'return', value: Promise.resolve(value) },
-        })
-        return mock
-      },
-
-      rejectsWithOnce(error: any) {
-        parameterOverrides.push({
-          args,
-          spec: { type: 'lazy-return', value: () => Promise.reject(error) },
-        })
-        return mock
-      },
-    }
-  }
+  mock.given = (...args: any[]) => ({
+    returnsOnce(value: any) {
+      parameterOverrides.push({ args, spec: { type: 'return', value } })
+      return mock
+    },
+
+    throwsOnce(error: any) {
+      parameterOverrides.push({ args, spec: { type: 'throw', error } })
+      return mock
+    },
+
+    executesOnce(implementation: (...args: any[]) => any) {
+      parameterOverrides.push({
+        args,
+        spec: { type: 'exec', implementation },
+      })
+      return mock
+    },
+
+    resolvesToOnce(value: any) {
+      parameterOverrides.push({
+        args,
+        spec: { type: 'return', value: Promise.resolve(value) },
+      })
+      return mock
+    },
+
+    rejectsWithOnce(error: any) {
+      parameterOverrides.push({
+        args,
+        spec: { type: 'lazy-return', value: () => Promise.reject(error) },
+      })
+      return mock
+    },
+  })
 
   if (defaultImplementation) {
     mock.executes(defaultImplementation)
diff --git a/packages/earl/src/test/errors.ts b/packages/earl/src/test/errors.ts
index 991670cc..960db657 100644
--- a/packages/earl/src/test/errors.ts
+++ b/packages/earl/src/test/errors.ts
@@ -48,7 +48,6 @@ export function stripIndent(
   ...expressions: unknown[]
 ) {
   const result = template.reduce((accumulator, part, i) => {
-    // eslint-disable-next-line @typescript-eslint/restrict-plus-operands
     return accumulator + expressions[i - 1] + part
   })
 
@@ -69,7 +68,7 @@ export function stripIndent(
     ...lines.filter((line) => !/^\s*$/.test(line)).map(leadingSpaces),
   )
 
-  if (minIndent === Infinity) {
+  if (minIndent === Number.POSITIVE_INFINITY) {
     minIndent = 0
   }
 
diff --git a/packages/earl/src/test/values.ts b/packages/earl/src/test/values.ts
index e34a8fc8..206f8a8e 100644
--- a/packages/earl/src/test/values.ts
+++ b/packages/earl/src/test/values.ts
@@ -15,7 +15,7 @@ export const TEST_NUMBERS = [
   Number.EPSILON,
   Number.NEGATIVE_INFINITY,
   Number.POSITIVE_INFINITY,
-  NaN,
+  Number.NaN,
 ]
 
 export const TEST_BIGINTS = [BigInt(0), BigInt(1), BigInt(-1000), BigInt(1000)]
diff --git a/packages/earl/src/validators/basic/toBeA.ts b/packages/earl/src/validators/basic/toBeA.ts
index 665389c7..876ab856 100644
--- a/packages/earl/src/validators/basic/toBeA.ts
+++ b/packages/earl/src/validators/basic/toBeA.ts
@@ -1,10 +1,9 @@
-import { Control } from '../../Control.js'
+import type { Control } from '../../Control.js'
 import { registerValidator } from '../../expect.js'
 import { formatCompact } from '../../format/index.js'
 import { a, type NewableOrPrimitive } from '../../matchers/basic/a.js'
 
 declare module '../../expect.js' {
-  // eslint-disable-next-line @typescript-eslint/no-unused-vars
   interface Validators<T> {
     /**
      * Asserts that the value is an instance of a provided class or a primitive
diff --git a/packages/earl/src/validators/basic/toBeFalsy.test.ts b/packages/earl/src/validators/basic/toBeFalsy.test.ts
index e7ed2526..83191321 100644
--- a/packages/earl/src/validators/basic/toBeFalsy.test.ts
+++ b/packages/earl/src/validators/basic/toBeFalsy.test.ts
@@ -4,7 +4,7 @@ import { expect as earl, formatCompact } from '../../index.js'
 import { toBeFalsy } from './toBeFalsy.js'
 
 describe(toBeFalsy.name, () => {
-  const falsyValues = [null, undefined, false, 0, NaN, '']
+  const falsyValues = [null, undefined, false, 0, Number.NaN, '']
   const truthyValues = [true, 42, 'hello', {}, [], () => {}]
 
   describe('without .not', () => {
diff --git a/packages/earl/src/validators/basic/toBeFalsy.ts b/packages/earl/src/validators/basic/toBeFalsy.ts
index 39b763e9..e18a949a 100644
--- a/packages/earl/src/validators/basic/toBeFalsy.ts
+++ b/packages/earl/src/validators/basic/toBeFalsy.ts
@@ -1,10 +1,9 @@
-import { Control } from '../../Control.js'
+import type { Control } from '../../Control.js'
 import { registerValidator } from '../../expect.js'
 import { formatCompact } from '../../format/index.js'
 import { falsy } from '../../matchers/basic/falsy.js'
 
 declare module '../../expect.js' {
-  // eslint-disable-next-line @typescript-eslint/no-unused-vars
   interface Validators<T> {
     /**
      * Asserts that a value is falsy, as defined by:
diff --git a/packages/earl/src/validators/basic/toBeNullish.ts b/packages/earl/src/validators/basic/toBeNullish.ts
index 7613d080..3371d58f 100644
--- a/packages/earl/src/validators/basic/toBeNullish.ts
+++ b/packages/earl/src/validators/basic/toBeNullish.ts
@@ -1,10 +1,9 @@
-import { Control } from '../../Control.js'
+import type { Control } from '../../Control.js'
 import { registerValidator } from '../../expect.js'
 import { formatCompact } from '../../format/index.js'
 import { nullish } from '../../matchers/basic/nullish.js'
 
 declare module '../../expect.js' {
-  // eslint-disable-next-line @typescript-eslint/no-unused-vars
   interface Validators<T> {
     /**
      * Asserts that a value is nullish, meaning it is either `null` or
diff --git a/packages/earl/src/validators/basic/toBeTruthy.test.ts b/packages/earl/src/validators/basic/toBeTruthy.test.ts
index 3bd6df93..8821f720 100644
--- a/packages/earl/src/validators/basic/toBeTruthy.test.ts
+++ b/packages/earl/src/validators/basic/toBeTruthy.test.ts
@@ -5,7 +5,7 @@ import { toBeTruthy } from './toBeTruthy.js'
 
 describe(toBeTruthy.name, () => {
   const truthyValues = [true, 42, 'hello', {}, [], () => {}]
-  const falsyValues = [null, undefined, false, 0, NaN, '']
+  const falsyValues = [null, undefined, false, 0, Number.NaN, '']
 
   describe('without .not', () => {
     describe('with truthy values', () => {
diff --git a/packages/earl/src/validators/basic/toBeTruthy.ts b/packages/earl/src/validators/basic/toBeTruthy.ts
index 80933864..0807d635 100644
--- a/packages/earl/src/validators/basic/toBeTruthy.ts
+++ b/packages/earl/src/validators/basic/toBeTruthy.ts
@@ -1,10 +1,9 @@
-import { Control } from '../../Control.js'
+import type { Control } from '../../Control.js'
 import { registerValidator } from '../../expect.js'
 import { formatCompact } from '../../format/index.js'
 import { truthy } from '../../matchers/basic/truthy.js'
 
 declare module '../../expect.js' {
-  // eslint-disable-next-line @typescript-eslint/no-unused-vars
   interface Validators<T> {
     /**
      * Asserts that a value is truthy, as defined by:
diff --git a/packages/earl/src/validators/basic/toMatchRegex.ts b/packages/earl/src/validators/basic/toMatchRegex.ts
index 2e954fe4..d0baa526 100644
--- a/packages/earl/src/validators/basic/toMatchRegex.ts
+++ b/packages/earl/src/validators/basic/toMatchRegex.ts
@@ -1,10 +1,9 @@
-import { Control } from '../../Control.js'
+import type { Control } from '../../Control.js'
 import { registerValidator } from '../../expect.js'
 import { formatCompact } from '../../format/index.js'
 import { regex } from '../../matchers/basic/regex.js'
 
 declare module '../../expect.js' {
-  // eslint-disable-next-line @typescript-eslint/no-unused-vars
   interface Validators<T> {
     /**
      * Asserts that the value is a string matching the given regular expression.
diff --git a/packages/earl/src/validators/custom/toMatchSchema.ts b/packages/earl/src/validators/custom/toMatchSchema.ts
index 3c1b34be..3eab2a9c 100644
--- a/packages/earl/src/validators/custom/toMatchSchema.ts
+++ b/packages/earl/src/validators/custom/toMatchSchema.ts
@@ -1,10 +1,9 @@
-import { Control } from '../../Control.js'
+import type { Control } from '../../Control.js'
 import { registerValidator } from '../../expect.js'
 import { formatCompact } from '../../format/index.js'
 import { schema, type ZodSchema } from '../../matchers/custom/schema.js'
 
 declare module '../../expect.js' {
-  // eslint-disable-next-line @typescript-eslint/no-unused-vars
   interface Validators<T> {
     /**
      * Asserts that the value conforms to the provided zod schema.
diff --git a/packages/earl/src/validators/custom/toSatisfy.ts b/packages/earl/src/validators/custom/toSatisfy.ts
index 0eb772d6..88a76d11 100644
--- a/packages/earl/src/validators/custom/toSatisfy.ts
+++ b/packages/earl/src/validators/custom/toSatisfy.ts
@@ -1,10 +1,9 @@
-import { Control } from '../../Control.js'
+import type { Control } from '../../Control.js'
 import { registerValidator } from '../../expect.js'
 import { formatCompact } from '../../format/index.js'
 import { satisfies } from '../../matchers/custom/satisfies.js'
 
 declare module '../../expect.js' {
-  // eslint-disable-next-line @typescript-eslint/no-unused-vars
   interface Validators<T> {
     /**
      * Asserts that the provided predicate returns a truthy result for the given
diff --git a/packages/earl/src/validators/mocks/toHaveBeenCalled.ts b/packages/earl/src/validators/mocks/toHaveBeenCalled.ts
index c22bf990..7694e1c0 100644
--- a/packages/earl/src/validators/mocks/toHaveBeenCalled.ts
+++ b/packages/earl/src/validators/mocks/toHaveBeenCalled.ts
@@ -1,10 +1,9 @@
-import { Control } from '../../Control.js'
+import type { Control } from '../../Control.js'
 import { registerValidator } from '../../expect.js'
 import type { MockFunction } from '../../mocks/index.js'
 import { assertIsMock, formatCalledTimes } from './utils.js'
 
 declare module '../../expect.js' {
-  // eslint-disable-next-line @typescript-eslint/no-unused-vars
   interface Validators<T> {
     /**
      * Asserts that the mock function has been called at least once.
diff --git a/packages/earl/src/validators/mocks/toHaveBeenCalledTimes.ts b/packages/earl/src/validators/mocks/toHaveBeenCalledTimes.ts
index 68bc840c..c5671690 100644
--- a/packages/earl/src/validators/mocks/toHaveBeenCalledTimes.ts
+++ b/packages/earl/src/validators/mocks/toHaveBeenCalledTimes.ts
@@ -1,11 +1,10 @@
-import { Control } from '../../Control.js'
+import type { Control } from '../../Control.js'
 import { registerValidator } from '../../expect.js'
 import { formatCompact } from '../../format/index.js'
 import type { MockFunction } from '../../mocks/index.js'
 import { assertIsMock, formatCalledTimes, formatTimes } from './utils.js'
 
 declare module '../../expect.js' {
-  // eslint-disable-next-line @typescript-eslint/no-unused-vars
   interface Validators<T> {
     /**
      * Asserts that the mock function was called the given number of times.
diff --git a/packages/earl/src/validators/mocks/toHaveBeenCalledWith.ts b/packages/earl/src/validators/mocks/toHaveBeenCalledWith.ts
index 5270c205..920f4744 100644
--- a/packages/earl/src/validators/mocks/toHaveBeenCalledWith.ts
+++ b/packages/earl/src/validators/mocks/toHaveBeenCalledWith.ts
@@ -1,4 +1,4 @@
-import { Control } from '../../Control.js'
+import type { Control } from '../../Control.js'
 import { registerValidator } from '../../expect.js'
 import { formatCompact } from '../../format/index.js'
 import { isEqual } from '../../isEqual/index.js'
diff --git a/packages/earl/src/validators/mocks/toHaveBeenExhausted.ts b/packages/earl/src/validators/mocks/toHaveBeenExhausted.ts
index 199bc7cf..44f844cf 100644
--- a/packages/earl/src/validators/mocks/toHaveBeenExhausted.ts
+++ b/packages/earl/src/validators/mocks/toHaveBeenExhausted.ts
@@ -1,10 +1,9 @@
-import { Control } from '../../Control.js'
+import type { Control } from '../../Control.js'
 import { registerValidator } from '../../expect.js'
 import type { MockFunction } from '../../mocks/index.js'
 import { assertIsMock } from './utils.js'
 
 declare module '../../expect.js' {
-  // eslint-disable-next-line @typescript-eslint/no-unused-vars
   interface Validators<T> {
     /**
      * Asserts that the mock function was called enough so that all the
diff --git a/packages/earl/src/validators/mocks/toHaveBeenLastCalledWith.ts b/packages/earl/src/validators/mocks/toHaveBeenLastCalledWith.ts
index 73d771a2..7d8a9350 100644
--- a/packages/earl/src/validators/mocks/toHaveBeenLastCalledWith.ts
+++ b/packages/earl/src/validators/mocks/toHaveBeenLastCalledWith.ts
@@ -1,4 +1,4 @@
-import { Control } from '../../Control.js'
+import type { Control } from '../../Control.js'
 import { registerValidator } from '../../expect.js'
 import type { MockFunction, MockParameters } from '../../mocks/index.js'
 import { assertIsMock, compareArgs } from './utils.js'
diff --git a/packages/earl/src/validators/mocks/toHaveBeenNthCalledWith.ts b/packages/earl/src/validators/mocks/toHaveBeenNthCalledWith.ts
index c40263a6..9c0ab9fe 100644
--- a/packages/earl/src/validators/mocks/toHaveBeenNthCalledWith.ts
+++ b/packages/earl/src/validators/mocks/toHaveBeenNthCalledWith.ts
@@ -1,4 +1,4 @@
-import { Control } from '../../Control.js'
+import type { Control } from '../../Control.js'
 import { registerValidator } from '../../expect.js'
 import { formatCompact } from '../../format/index.js'
 import type { MockFunction, MockParameters } from '../../mocks/index.js'
diff --git a/packages/earl/src/validators/mocks/toHaveBeenOnlyCalledWith.ts b/packages/earl/src/validators/mocks/toHaveBeenOnlyCalledWith.ts
index 6d1508a7..7803297c 100644
--- a/packages/earl/src/validators/mocks/toHaveBeenOnlyCalledWith.ts
+++ b/packages/earl/src/validators/mocks/toHaveBeenOnlyCalledWith.ts
@@ -1,4 +1,4 @@
-import { Control } from '../../Control.js'
+import type { Control } from '../../Control.js'
 import { registerValidator } from '../../expect.js'
 import type { MockFunction, MockParameters } from '../../mocks/index.js'
 import { assertIsMock, compareArgs, formatCalledTimes } from './utils.js'
diff --git a/packages/earl/src/validators/mocks/utils.ts b/packages/earl/src/validators/mocks/utils.ts
index ecab1dbf..392f6626 100644
--- a/packages/earl/src/validators/mocks/utils.ts
+++ b/packages/earl/src/validators/mocks/utils.ts
@@ -1,4 +1,4 @@
-import { Control } from '../../Control.js'
+import type { Control } from '../../Control.js'
 import { formatCompact } from '../../format/index.js'
 import { isEqual } from '../../isEqual/index.js'
 import { isMockFn, type MockFunction } from '../../mocks/index.js'
diff --git a/packages/earl/src/validators/numbers/toBeASafeInteger.ts b/packages/earl/src/validators/numbers/toBeASafeInteger.ts
index 6c502daa..2a423f24 100644
--- a/packages/earl/src/validators/numbers/toBeASafeInteger.ts
+++ b/packages/earl/src/validators/numbers/toBeASafeInteger.ts
@@ -1,10 +1,9 @@
-import { Control } from '../../Control.js'
+import type { Control } from '../../Control.js'
 import { registerValidator } from '../../expect.js'
 import { formatCompact } from '../../format/index.js'
 import { safeInteger } from '../../matchers/numbers/safeInteger.js'
 
 declare module '../../expect.js' {
-  // eslint-disable-next-line @typescript-eslint/no-unused-vars
   interface Validators<T> {
     /**
      * Asserts that a value is an integer or a bigint and falls within the safe
diff --git a/packages/earl/src/validators/numbers/toBeAnInteger.ts b/packages/earl/src/validators/numbers/toBeAnInteger.ts
index 857264a1..9bd40dfd 100644
--- a/packages/earl/src/validators/numbers/toBeAnInteger.ts
+++ b/packages/earl/src/validators/numbers/toBeAnInteger.ts
@@ -1,10 +1,9 @@
-import { Control } from '../../Control.js'
+import type { Control } from '../../Control.js'
 import { registerValidator } from '../../expect.js'
 import { formatCompact } from '../../format/index.js'
 import { integer } from '../../matchers/numbers/integer.js'
 
 declare module '../../expect.js' {
-  // eslint-disable-next-line @typescript-eslint/no-unused-vars
   interface Validators<T> {
     /**
      * Asserts that a value is an integer or a bigint.
diff --git a/packages/earl/src/validators/numbers/toBeBetween.ts b/packages/earl/src/validators/numbers/toBeBetween.ts
index 98ccc44d..09694e95 100644
--- a/packages/earl/src/validators/numbers/toBeBetween.ts
+++ b/packages/earl/src/validators/numbers/toBeBetween.ts
@@ -1,10 +1,9 @@
-import { Control } from '../../Control.js'
+import type { Control } from '../../Control.js'
 import { registerValidator } from '../../expect.js'
 import { formatCompact } from '../../format/index.js'
 import { between } from '../../matchers/numbers/between.js'
 
 declare module '../../expect.js' {
-  // eslint-disable-next-line @typescript-eslint/no-unused-vars
   interface Validators<T> {
     /**
      * Asserts that a number is between the two numbers. The range is
diff --git a/packages/earl/src/validators/numbers/toBeCloseTo.ts b/packages/earl/src/validators/numbers/toBeCloseTo.ts
index 2baff8d1..8337a151 100644
--- a/packages/earl/src/validators/numbers/toBeCloseTo.ts
+++ b/packages/earl/src/validators/numbers/toBeCloseTo.ts
@@ -1,10 +1,9 @@
-import { Control } from '../../Control.js'
+import type { Control } from '../../Control.js'
 import { registerValidator } from '../../expect.js'
 import { formatCompact } from '../../format/index.js'
 import { closeTo } from '../../matchers/numbers/closeTo.js'
 
 declare module '../../expect.js' {
-  // eslint-disable-next-line @typescript-eslint/no-unused-vars
   interface Validators<T> {
     /**
      * Asserts that a number is close to the target value.The range is
diff --git a/packages/earl/src/validators/numbers/toBeGreaterThan.ts b/packages/earl/src/validators/numbers/toBeGreaterThan.ts
index 4d2af695..9cdaab4e 100644
--- a/packages/earl/src/validators/numbers/toBeGreaterThan.ts
+++ b/packages/earl/src/validators/numbers/toBeGreaterThan.ts
@@ -1,10 +1,9 @@
-import { Control } from '../../Control.js'
+import type { Control } from '../../Control.js'
 import { registerValidator } from '../../expect.js'
 import { formatCompact } from '../../format/index.js'
 import { greaterThan } from '../../matchers/numbers/greaterThan.js'
 
 declare module '../../expect.js' {
-  // eslint-disable-next-line @typescript-eslint/no-unused-vars
   interface Validators<T> {
     /**
      * Asserts that a number is greater than the target value.
diff --git a/packages/earl/src/validators/numbers/toBeGreaterThanOrEqual.ts b/packages/earl/src/validators/numbers/toBeGreaterThanOrEqual.ts
index 8024ecab..1e1c3726 100644
--- a/packages/earl/src/validators/numbers/toBeGreaterThanOrEqual.ts
+++ b/packages/earl/src/validators/numbers/toBeGreaterThanOrEqual.ts
@@ -1,10 +1,9 @@
-import { Control } from '../../Control.js'
+import type { Control } from '../../Control.js'
 import { registerValidator } from '../../expect.js'
 import { formatCompact } from '../../format/index.js'
 import { greaterThanOrEqual } from '../../matchers/numbers/greaterThanOrEqual.js'
 
 declare module '../../expect.js' {
-  // eslint-disable-next-line @typescript-eslint/no-unused-vars
   interface Validators<T> {
     /**
      * Asserts that a number is greater than or equal to the target value.
diff --git a/packages/earl/src/validators/numbers/toBeLessThan.ts b/packages/earl/src/validators/numbers/toBeLessThan.ts
index f7ebe124..256963e3 100644
--- a/packages/earl/src/validators/numbers/toBeLessThan.ts
+++ b/packages/earl/src/validators/numbers/toBeLessThan.ts
@@ -1,10 +1,9 @@
-import { Control } from '../../Control.js'
+import type { Control } from '../../Control.js'
 import { registerValidator } from '../../expect.js'
 import { formatCompact } from '../../format/index.js'
 import { lessThan } from '../../matchers/numbers/lessThan.js'
 
 declare module '../../expect.js' {
-  // eslint-disable-next-line @typescript-eslint/no-unused-vars
   interface Validators<T> {
     /**
      * Asserts that a number is less the target value.
diff --git a/packages/earl/src/validators/numbers/toBeLessThanOrEqual.ts b/packages/earl/src/validators/numbers/toBeLessThanOrEqual.ts
index 7ab4765a..cfccf855 100644
--- a/packages/earl/src/validators/numbers/toBeLessThanOrEqual.ts
+++ b/packages/earl/src/validators/numbers/toBeLessThanOrEqual.ts
@@ -1,10 +1,9 @@
-import { Control } from '../../Control.js'
+import type { Control } from '../../Control.js'
 import { registerValidator } from '../../expect.js'
 import { formatCompact } from '../../format/index.js'
 import { lessThanOrEqual } from '../../matchers/numbers/lessThanOrEqual.js'
 
 declare module '../../expect.js' {
-  // eslint-disable-next-line @typescript-eslint/no-unused-vars
   interface Validators<T> {
     /**
      * Asserts that a number is less than or equal to the target value.
diff --git a/packages/earl/src/validators/objects/toBeEmpty.ts b/packages/earl/src/validators/objects/toBeEmpty.ts
index 85a0880a..fddef97e 100644
--- a/packages/earl/src/validators/objects/toBeEmpty.ts
+++ b/packages/earl/src/validators/objects/toBeEmpty.ts
@@ -1,10 +1,9 @@
-import { Control } from '../../Control.js'
+import type { Control } from '../../Control.js'
 import { registerValidator } from '../../expect.js'
 import { formatCompact } from '../../format/index.js'
 import { empty } from '../../matchers/objects/empty.js'
 
 declare module '../../expect.js' {
-  // eslint-disable-next-line @typescript-eslint/no-unused-vars
   interface Validators<T> {
     /**
      * Asserts that a string, array, sets or map is empty.
diff --git a/packages/earl/src/validators/objects/toEqualUnsorted.ts b/packages/earl/src/validators/objects/toEqualUnsorted.ts
index 47363117..f472d99b 100644
--- a/packages/earl/src/validators/objects/toEqualUnsorted.ts
+++ b/packages/earl/src/validators/objects/toEqualUnsorted.ts
@@ -1,4 +1,4 @@
-import { Control } from '../../Control.js'
+import type { Control } from '../../Control.js'
 import { registerValidator } from '../../expect.js'
 import { formatCompact } from '../../format/index.js'
 import { isEqual } from '../../isEqual/index.js'
diff --git a/packages/earl/src/validators/objects/toHaveLength.ts b/packages/earl/src/validators/objects/toHaveLength.ts
index 3c5fa33f..6bfbdb64 100644
--- a/packages/earl/src/validators/objects/toHaveLength.ts
+++ b/packages/earl/src/validators/objects/toHaveLength.ts
@@ -1,10 +1,9 @@
-import { Control } from '../../Control.js'
+import type { Control } from '../../Control.js'
 import { registerValidator } from '../../expect.js'
 import { formatCompact } from '../../format/index.js'
 import { length } from '../../matchers/objects/length.js'
 
 declare module '../../expect.js' {
-  // eslint-disable-next-line @typescript-eslint/no-unused-vars
   interface Validators<T> {
     /**
      * Asserts that a string, array or object with a `length` property has a
diff --git a/packages/earl/src/validators/objects/toHaveSubset.ts b/packages/earl/src/validators/objects/toHaveSubset.ts
index 585e1deb..1ea0c1ba 100644
--- a/packages/earl/src/validators/objects/toHaveSubset.ts
+++ b/packages/earl/src/validators/objects/toHaveSubset.ts
@@ -1,10 +1,9 @@
-import { Control } from '../../Control.js'
+import type { Control } from '../../Control.js'
 import { registerValidator } from '../../expect.js'
 import { formatCompact } from '../../format/index.js'
 import { type Subset, subset } from '../../matchers/objects/subset.js'
 
 declare module '../../expect.js' {
-  // eslint-disable-next-line @typescript-eslint/no-unused-vars
   interface Validators<T> {
     /**
      * Asserts that an object contains the given key value pairs.
diff --git a/packages/earl/src/validators/objects/toInclude.ts b/packages/earl/src/validators/objects/toInclude.ts
index 89a6f9ad..9b524c87 100644
--- a/packages/earl/src/validators/objects/toInclude.ts
+++ b/packages/earl/src/validators/objects/toInclude.ts
@@ -1,4 +1,4 @@
-import { Control } from '../../Control.js'
+import type { Control } from '../../Control.js'
 import { registerValidator } from '../../expect.js'
 import { formatCompact } from '../../format/index.js'
 import { includes } from '../../matchers/objects/includes.js'
@@ -12,7 +12,6 @@ type MemberOf<T> = T extends (infer U)[]
       : unknown
 
 declare module '../../expect.js' {
-  // eslint-disable-next-line @typescript-eslint/no-unused-vars
   interface Validators<T> {
     /**
      * Asserts that a string includes all of the provided substrings. The
@@ -82,9 +81,7 @@ function formatItems(items: unknown[]) {
 
 function languageJoin(items: string[]) {
   if (items.length === 1) {
-    // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
     return items[0]!
   }
-  // eslint-disable-next-line @typescript-eslint/restrict-template-expressions
   return `all of: ${items.slice(0, -1).join(', ')} and ${items.at(-1)}`
 }
diff --git a/packages/earl/src/validators/other/errors.ts b/packages/earl/src/validators/other/errors.ts
index c92cbdf8..914c1f43 100644
--- a/packages/earl/src/validators/other/errors.ts
+++ b/packages/earl/src/validators/other/errors.ts
@@ -1,4 +1,4 @@
-import { Control } from '../../Control.js'
+import type { Control } from '../../Control.js'
 import { format, formatCompact } from '../../format/index.js'
 
 export function captureError(fn: () => unknown) {
diff --git a/packages/earl/src/validators/other/toBeRejectedWith.ts b/packages/earl/src/validators/other/toBeRejectedWith.ts
index ede11eab..325cfbf9 100644
--- a/packages/earl/src/validators/other/toBeRejectedWith.ts
+++ b/packages/earl/src/validators/other/toBeRejectedWith.ts
@@ -1,10 +1,9 @@
-import { Control } from '../../Control.js'
+import type { Control } from '../../Control.js'
 import { registerValidator } from '../../expect.js'
 import { formatCompact } from '../../format/index.js'
 import { captureAsyncError, processError } from './errors.js'
 
 declare module '../../expect.js' {
-  // eslint-disable-next-line @typescript-eslint/no-unused-vars
   interface Validators<T> {
     /**
      * Asserts that an async function or a promise was rejected.
@@ -138,7 +137,6 @@ export async function toBeRejectedWith(
 
 async function handleAsyncFunction(
   control: Control,
-  // eslint-disable-next-line @typescript-eslint/ban-types
   fn: Function,
   errorClassOrMessage?: (new (...args: any[]) => Error) | string | RegExp,
   message?: string | RegExp,
diff --git a/packages/earl/src/validators/other/toEqual.ts b/packages/earl/src/validators/other/toEqual.ts
index 531a41b6..850b669b 100644
--- a/packages/earl/src/validators/other/toEqual.ts
+++ b/packages/earl/src/validators/other/toEqual.ts
@@ -1,4 +1,4 @@
-import { Control } from '../../Control.js'
+import type { Control } from '../../Control.js'
 import { registerValidator } from '../../expect.js'
 import { formatCompact } from '../../format/index.js'
 import { isEqual } from '../../isEqual/index.js'
diff --git a/packages/earl/src/validators/other/toExactlyEqual.test.ts b/packages/earl/src/validators/other/toExactlyEqual.test.ts
index 78fb283c..a7ae2559 100644
--- a/packages/earl/src/validators/other/toExactlyEqual.test.ts
+++ b/packages/earl/src/validators/other/toExactlyEqual.test.ts
@@ -15,7 +15,7 @@ describe(toExactlyEqual.name, () => {
     it('passes for NaNs', () => {
       expect(() => {
         // @ts-expect-error - desired behavior
-        earl(NaN).toExactlyEqual(NaN)
+        earl(Number.NaN).toExactlyEqual(Number.NaN)
       }).not.to.throw()
     })
 
@@ -48,7 +48,7 @@ describe(toExactlyEqual.name, () => {
     it('fails for NaNs', () => {
       expect(() => {
         // @ts-expect-error - desired behavior
-        earl(NaN).not.toExactlyEqual(NaN)
+        earl(Number.NaN).not.toExactlyEqual(Number.NaN)
       }).to.throw(
         'The value NaN is the exact same value as NaN, but it was expected not to be.',
       )
diff --git a/packages/earl/src/validators/other/toExactlyEqual.ts b/packages/earl/src/validators/other/toExactlyEqual.ts
index f179932e..c7bd8208 100644
--- a/packages/earl/src/validators/other/toExactlyEqual.ts
+++ b/packages/earl/src/validators/other/toExactlyEqual.ts
@@ -1,9 +1,8 @@
-import { Control } from '../../Control.js'
+import type { Control } from '../../Control.js'
 import { registerValidator } from '../../expect.js'
 import { formatCompact } from '../../format/index.js'
 
 declare module '../../expect.js' {
-  // eslint-disable-next-line @typescript-eslint/no-unused-vars
   interface Validators<T> {
     /**
      * Asserts that a value is referentially equal to the expected value.
diff --git a/packages/earl/src/validators/other/toLooseEqual.ts b/packages/earl/src/validators/other/toLooseEqual.ts
index c3ef56be..99a0c235 100644
--- a/packages/earl/src/validators/other/toLooseEqual.ts
+++ b/packages/earl/src/validators/other/toLooseEqual.ts
@@ -1,11 +1,10 @@
-import { Control } from '../../Control.js'
+import type { Control } from '../../Control.js'
 import { registerValidator } from '../../expect.js'
 import { LOOSE_FORMAT_OPTIONS } from '../../format/FormatOptions.js'
 import { format, formatCompact } from '../../format/index.js'
 import { isEqual, LOOSE_EQUALITY_OPTIONS } from '../../isEqual/index.js'
 
 declare module '../../expect.js' {
-  // eslint-disable-next-line @typescript-eslint/no-unused-vars
   interface Validators<T> {
     /**
      * Asserts that a value is loosely equal to another value. The equality is
diff --git a/packages/earl/src/validators/other/toThrow.ts b/packages/earl/src/validators/other/toThrow.ts
index 89a90f02..ef5adc51 100644
--- a/packages/earl/src/validators/other/toThrow.ts
+++ b/packages/earl/src/validators/other/toThrow.ts
@@ -1,10 +1,9 @@
-import { Control } from '../../Control.js'
+import type { Control } from '../../Control.js'
 import { registerValidator } from '../../expect.js'
 import { formatCompact } from '../../format/index.js'
 import { captureError, processError } from './errors.js'
 
 declare module '../../expect.js' {
-  // eslint-disable-next-line @typescript-eslint/no-unused-vars
   interface Validators<T> {
     /**
      * Asserts that a function throws a given message and/or error class when
diff --git a/packages/earl/src/validators/snapshots/toMatchSnapshot.test.ts b/packages/earl/src/validators/snapshots/toMatchSnapshot.test.ts
index c656166b..96d145b6 100644
--- a/packages/earl/src/validators/snapshots/toMatchSnapshot.test.ts
+++ b/packages/earl/src/validators/snapshots/toMatchSnapshot.test.ts
@@ -13,7 +13,6 @@ describe(toMatchSnapshot.name, () => {
   let content: string
   let envCi: string | undefined
   let envUpdateSnapshots: string | undefined
-  // eslint-disable-next-line no-path-concat
   const SNAPSHOT_FILE = fileURLToPath(import.meta.url) + '.snapshot'
 
   const mochaContext = (title: string): MochaTestContext => ({
diff --git a/packages/earl/src/validators/snapshots/toMatchSnapshot.ts b/packages/earl/src/validators/snapshots/toMatchSnapshot.ts
index dda47970..87aba5dd 100644
--- a/packages/earl/src/validators/snapshots/toMatchSnapshot.ts
+++ b/packages/earl/src/validators/snapshots/toMatchSnapshot.ts
@@ -1,6 +1,6 @@
 import { writeFileSync } from 'fs'
 
-import { Control } from '../../Control.js'
+import type { Control } from '../../Control.js'
 import { registerValidator } from '../../expect.js'
 import { format, formatCompact } from '../../format/index.js'
 import { formatSnapshot } from './format.js'
@@ -9,7 +9,6 @@ import { getSnapshotUpdateMode } from './getSnapshotUpdateMode.js'
 import type { TestContext } from './TestContext.js'
 
 declare module '../../expect.js' {
-  // eslint-disable-next-line @typescript-eslint/no-unused-vars
   interface Validators<T> {
     /**
      * Asserts that a value is equal to a snapshot. The first time the assertion
@@ -50,7 +49,6 @@ declare module '../../expect.js' {
 registerValidator('toMatchSnapshot', toMatchSnapshot)
 
 export function toMatchSnapshot(control: Control, context: TestContext) {
-  // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
   if (context === undefined) {
     throw new TypeError(
       'Invalid or no test context provided to .toMatchSnapshot(context).',
diff --git a/packages/website/generators/api-reference/generate.test.ts b/packages/website/generators/api-reference/generate.test.ts
index ceed4f5a..d3f4ec51 100644
--- a/packages/website/generators/api-reference/generate.test.ts
+++ b/packages/website/generators/api-reference/generate.test.ts
@@ -1,5 +1,5 @@
 import { expect } from 'earl'
-import { readFileSync } from 'fs'
+import { readFileSync } from 'node:fs'
 
 import { generateMarkdownForMethodDocumentation } from './generate'
 import { parseTsDocComment } from './tsdocs/parse'
diff --git a/packages/website/generators/api-reference/generate.ts b/packages/website/generators/api-reference/generate.ts
index 59ca10a7..568fbc01 100644
--- a/packages/website/generators/api-reference/generate.ts
+++ b/packages/website/generators/api-reference/generate.ts
@@ -2,7 +2,7 @@ import { sortBy } from 'lodash'
 
 import { extractTsDocCommentsFromString } from './tsdocs/extract'
 import { parseTsDocComment } from './tsdocs/parse'
-import { MethodDocumentation } from './types'
+import type { MethodDocumentation } from './types'
 
 export function generateSectionReference(
   sectionName: string,
@@ -26,10 +26,11 @@ export function generateSectionReference(
     abbreviatedSignature: prefixMethodSignature(prefix, c.abbreviatedSignature),
   }))
 
+  const markdown = prefixed
+    .map(generateMarkdownForMethodDocumentation)
+    .join('\n')
   return {
-    reference:
-      `## ${sectionName}\n\n` +
-      prefixed.map(generateMarkdownForMethodDocumentation).join('\n'),
+    reference: `## ${sectionName}\n\n${markdown}`,
   }
 }
 
@@ -78,8 +79,10 @@ ${
   // Instead of rendering a few consecutive code snippets, we render a single,
   // examples separated with a blank line.
   doc.examples.reduce((a, v) => {
-    if (a.endsWith('```')) return a.slice(0, -3) + v.replace(/```\w+\n/, '\n')
-    else return a + '\n' + v
+    if (a.endsWith('```')) {
+      return a.slice(0, -3) + v.replace(/```\w+\n/, '\n')
+    }
+    return `${a}\n${v}`
   }, '')
 }`
 
diff --git a/packages/website/generators/api-reference/generateApiReference.ts b/packages/website/generators/api-reference/generateApiReference.ts
index e4e62136..7be5da9b 100644
--- a/packages/website/generators/api-reference/generateApiReference.ts
+++ b/packages/website/generators/api-reference/generateApiReference.ts
@@ -1,8 +1,8 @@
 /* eslint-disable no-console */
 import glob from 'fast-glob'
-import * as fs from 'fs'
-import { resolve } from 'path'
-import { promisify } from 'util'
+import * as fs from 'node:fs'
+import { resolve } from 'node:path'
+import { promisify } from 'node:util'
 
 const writeFile = promisify(fs.writeFile)
 const readFile = promisify(fs.readFile)
@@ -61,7 +61,7 @@ export async function generateApiReference(
   if (args.out) {
     await writeFile(args.out, output, 'utf-8')
     return ''
-  } else {
-    return output
   }
+
+  return output
 }
diff --git a/packages/website/generators/api-reference/index.ts b/packages/website/generators/api-reference/index.ts
index 1a78e2ac..e2ed2c1d 100644
--- a/packages/website/generators/api-reference/index.ts
+++ b/packages/website/generators/api-reference/index.ts
@@ -1,5 +1,5 @@
-import { writeFileSync } from 'fs'
-import path from 'path'
+import { writeFileSync } from 'node:fs'
+import path from 'node:path'
 
 import { generateApiReference } from './generateApiReference'
 
@@ -31,7 +31,6 @@ async function main() {
 }
 
 void main().catch((err) => {
-  // eslint-disable-next-line no-console
   console.error(err)
   process.exit(1)
 })
diff --git a/packages/website/generators/api-reference/tsdocs/extract.ts b/packages/website/generators/api-reference/tsdocs/extract.ts
index 08c1fa7b..252ee561 100644
--- a/packages/website/generators/api-reference/tsdocs/extract.ts
+++ b/packages/website/generators/api-reference/tsdocs/extract.ts
@@ -1,6 +1,6 @@
 import { assert } from 'ts-essentials'
 
-import { MethodComment } from '../types'
+import type { MethodComment } from '../types'
 
 // @todo: this method could be simplified to only work when semicolon is present at the end of the signature
 export function extractTsDocCommentsFromString(
@@ -18,10 +18,8 @@ export function extractTsDocCommentsFromString(
     `Couldn't find any block comments in source:\n\`${source}\``,
   )
   while (rawMethodComment != null) {
-    // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
-    const comment = `/** ${rawMethodComment[1]!.trim()} */`
-    // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
-    let signature = removeGetterKeyword(rawMethodComment[2]!.trim())
+    const comment = `/** ${rawMethodComment[1]?.trim()} */`
+    let signature = removeGetterKeyword(rawMethodComment[2]?.trim() ?? '')
     signature = signature.replace(/\n/g, '')
     signature = signature.replace(/[ ]+/g, ' ')
     signature = signature.replace(/,[ ]?\)/g, ')')
diff --git a/packages/website/generators/api-reference/tsdocs/parse.test.ts b/packages/website/generators/api-reference/tsdocs/parse.test.ts
index 1ed17338..12df4266 100644
--- a/packages/website/generators/api-reference/tsdocs/parse.test.ts
+++ b/packages/website/generators/api-reference/tsdocs/parse.test.ts
@@ -1,8 +1,9 @@
 import { expect } from 'earl'
 
-import { MethodComment } from '../types'
+import type { MethodComment } from '../types'
 import { parseTsDocComment } from './parse'
 
+// biome-ignore lint/suspicious/noExportsInTest: This is actually used in another file
 export const sampleMethodComment: MethodComment = {
   signature: 'someMethod(x: number, y: number): void',
   comment: `/**
diff --git a/packages/website/generators/api-reference/tsdocs/parse.ts b/packages/website/generators/api-reference/tsdocs/parse.ts
index 8cfb99a5..5b6af00e 100644
--- a/packages/website/generators/api-reference/tsdocs/parse.ts
+++ b/packages/website/generators/api-reference/tsdocs/parse.ts
@@ -1,8 +1,8 @@
-import { DocExcerpt, DocNode, TSDocParser } from '@microsoft/tsdoc'
+import { DocExcerpt, type DocNode, TSDocParser } from '@microsoft/tsdoc'
 import { assert } from 'ts-essentials'
 import { Node, Project as TSProject } from 'ts-morph'
 
-import { MethodComment, MethodDocumentation, Param } from '../types'
+import type { MethodComment, MethodDocumentation, Param } from '../types'
 
 export function parseTsDocComment(
   methodComment: MethodComment,
@@ -16,10 +16,7 @@ export function parseTsDocComment(
 
   if (parserContext.log.messages.length > 0) {
     throw new Error(
-      `Syntax error: \n ${
-        // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
-        parserContext.log.messages[0]!.text
-      }\nwhile parsing: \n${methodComment.comment}\n${methodComment.signature}`,
+      `Syntax error: \n ${parserContext.log.messages[0]?.text}\nwhile parsing: \n${methodComment.comment}\n${methodComment.signature}`,
     )
   }
 
@@ -102,8 +99,7 @@ function abbreviateSignature(signature: string, project: TSProject): string {
   assert(Node.isFunctionDeclaration(functionDeclaration))
 
   if (signature.includes('this:')) {
-    // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
-    functionDeclaration.getParameter('this')!.remove()
+    functionDeclaration.getParameter('this')?.remove()
   }
 
   functionDeclaration.removeReturnType()
diff --git a/packages/website/generators/test-examples/chunks/preamble.ts b/packages/website/generators/test-examples/chunks/preamble.ts
index 723e4572..fad29729 100644
--- a/packages/website/generators/test-examples/chunks/preamble.ts
+++ b/packages/website/generators/test-examples/chunks/preamble.ts
@@ -1,6 +1,3 @@
-// Common setup shared across all examples
-export {}
-
 /* eslint-disable */
 import * as z from 'zod'
 
diff --git a/packages/website/generators/test-examples/generate.ts b/packages/website/generators/test-examples/generate.ts
index 60bcee01..627b8cb6 100644
--- a/packages/website/generators/test-examples/generate.ts
+++ b/packages/website/generators/test-examples/generate.ts
@@ -1,7 +1,7 @@
-import { readFileSync } from 'fs'
-import { join } from 'path'
+import { readFileSync } from 'node:fs'
+import { join } from 'node:path'
 
-import { Example } from './types'
+import type { Example } from './types'
 
 export function generateTestFile(examples: Example[]): string {
   // cut off first few lines of preamble as they are comments
diff --git a/packages/website/generators/test-examples/index.ts b/packages/website/generators/test-examples/index.ts
index 59ab8c56..b347d736 100644
--- a/packages/website/generators/test-examples/index.ts
+++ b/packages/website/generators/test-examples/index.ts
@@ -1,9 +1,9 @@
 import FastGlob from 'fast-glob'
-import { readFileSync, writeFileSync } from 'fs'
-import { basename, join } from 'path'
+import { readFileSync, writeFileSync } from 'node:fs'
+import { basename, join } from 'node:path'
 
 import { generateTestFile } from './generate'
-import { Example } from './types'
+import type { Example } from './types'
 
 export async function main() {
   console.log('Generating test examples from tsdocs...')