diff --git a/packages/converters/src/boolean-to-number/index.test.ts b/packages/converters/src/boolean-to-number/index.test.ts
index 02a66a97..243eaadf 100644
--- a/packages/converters/src/boolean-to-number/index.test.ts
+++ b/packages/converters/src/boolean-to-number/index.test.ts
@@ -13,15 +13,12 @@
 import { describe, expect, it } from 'vitest';
 import { booleanToNumber } from './';
 
-const testPairs: [boolean, number][] = [
-  [true, 1],
-  [false, 0],
-];
-
 describe('bool to number', () => {
-  for (const [input, result] of testPairs) {
-    it(`should convert ${input} to ${result}`, () => {
-      expect(booleanToNumber(input)).toEqual(result);
-    });
-  }
+  it('should convert true to 1', () => {
+    expect(booleanToNumber(true)).toEqual(1);
+  });
+
+  it('should convert false to 0', () => {
+    expect(booleanToNumber(false)).toEqual(0);
+  });
 });
diff --git a/packages/predicates/src/is-number/index.test.ts b/packages/predicates/src/is-number/index.test.ts
index 0408e757..6405e884 100644
--- a/packages/predicates/src/is-number/index.test.ts
+++ b/packages/predicates/src/is-number/index.test.ts
@@ -12,152 +12,69 @@
 
 import { expect, it, describe } from 'vitest';
 import { isFiniteNumber, isFiniteNumeric, isNumber, isNumeric } from './';
-import {
-  floatingPointPairs,
-  floatingPointStringPairs,
-  nonFinitePairs,
-  nonFiniteStringPairs,
-  nonNumericPairs,
-  numberLikeStringPairs,
-  numberLiteralPairs,
-} from './__fixtures__';
 
-describe('number validators', () => {
-  for (const pairs of numberLiteralPairs) {
-    it(`isFiniteNumber: ${pairs[0]}`, () => {
-      expect(isFiniteNumber(pairs[1])).toBeTruthy();
-    });
-
-    it(`isFiniteNumeric: ${pairs[0]}`, () => {
-      expect(isFiniteNumeric(pairs[1])).toBeTruthy();
-    });
-
-    it(`isNumber: ${pairs[0]}`, () => {
-      expect(isNumber(pairs[1])).toBeTruthy();
-    });
-
-    it(`isNumeric: ${pairs[0]}`, () => {
-      expect(isNumeric(pairs[1])).toBeTruthy();
-    });
-  }
-
-  for (const pairs of floatingPointPairs) {
-    it(`isFiniteNumber: ${pairs[0]}`, () => {
-      expect(isFiniteNumber(pairs[1])).toBeTruthy();
-    });
-
-    it(`isFiniteNumeric: ${pairs[0]}`, () => {
-      expect(isFiniteNumeric(pairs[1])).toBeTruthy();
-    });
-
-    it(`isNumber: ${pairs[0]}`, () => {
-      expect(isNumber(pairs[1])).toBeTruthy();
-    });
-
-    it(`isNumeric: ${pairs[0]}`, () => {
-      expect(isNumeric(pairs[1])).toBeTruthy();
-    });
-  }
-
-  for (const pairs of numberLikeStringPairs) {
-    it(`isFiniteNumber: ${pairs[0]}`, () => {
-      expect(isFiniteNumber(pairs[1])).toBeFalsy();
-    });
-
-    it(`isFiniteNumeric: ${pairs[0]}`, () => {
-      expect(isFiniteNumeric(pairs[1])).toBeTruthy();
-    });
-
-    it(`isNumber: ${pairs[0]}`, () => {
-      expect(isNumber(pairs[1])).toBeFalsy();
-    });
-
-    it(`isNumeric: ${pairs[0]}`, () => {
-      expect(isNumeric(pairs[1])).toBeTruthy();
-    });
-  }
-
-  for (const pairs of floatingPointStringPairs) {
-    it(`isFiniteNumber: ${pairs[0]}`, () => {
-      expect(isFiniteNumber(pairs[1])).toBeFalsy();
-    });
-
-    it(`isFiniteNumeric: ${pairs[0]}`, () => {
-      expect(isFiniteNumeric(pairs[1])).toBeTruthy();
-    });
+// biome-ignore lint/style/useNumberNamespace: want to diff against Number.NEGATIVE_INFINITY
+const INFINITY = Infinity;
+const { POSITIVE_INFINITY, NEGATIVE_INFINITY } = Number;
 
-    it(`isNumber: ${pairs[0]}`, () => {
-      expect(isNumber(pairs[1])).toBeFalsy();
-    });
-
-    it(`isNumeric: ${pairs[0]}`, () => {
-      expect(isNumeric(pairs[1])).toBeTruthy();
-    });
-  }
-
-  for (const pairs of nonFinitePairs) {
-    it(`isFiniteNumber: ${pairs[0]}`, () => {
-      expect(isFiniteNumber(pairs[1])).toBeFalsy();
-    });
-
-    it(`isFiniteNumeric: ${pairs[0]}`, () => {
-      expect(isFiniteNumeric(pairs[1])).toBeFalsy();
-    });
-
-    it(`isNumber: ${pairs[0]}`, () => {
-      expect(isNumber(pairs[1])).toBeTruthy();
-    });
-
-    it(`isNumeric: ${pairs[0]}`, () => {
-      expect(isNumeric(pairs[1])).toBeTruthy();
-    });
-  }
-
-  for (const pairs of nonFiniteStringPairs) {
-    it(`isFiniteNumber: ${pairs[0]}`, () => {
-      expect(isFiniteNumber(pairs[1])).toBeFalsy();
-    });
-
-    it(`isFiniteNumeric: ${pairs[0]}`, () => {
-      expect(isFiniteNumeric(pairs[1])).toBeFalsy();
-    });
-
-    it(`isNumber: ${pairs[0]}`, () => {
-      expect(isNumber(pairs[1])).toBeFalsy();
-    });
-
-    it(`isNumeric: ${pairs[0]}`, () => {
-      expect(isNumeric(pairs[1])).toBeTruthy();
-    });
-  }
-
-  for (const pairs of nonNumericPairs) {
-    it(`isFiniteNumber: ${pairs[0]}`, () => {
-      expect(isFiniteNumber(pairs[1])).toBeFalsy();
-    });
-
-    it(`isFiniteNumeric: ${pairs[0]}`, () => {
-      // TODO: find a cleaner way to do this
-      // NOTE: parseFloat will convert 7.2acdgs to 7.2
-      if (pairs[0].includes('trailing non-numeric')) {
-        expect(isFiniteNumeric(pairs[1])).toBeTruthy();
-      } else {
-        expect(isFiniteNumeric(pairs[1])).toBeFalsy();
-      }
-    });
-
-    it(`isNumber: ${pairs[0]}`, () => {
-      expect(isNumber(pairs[1])).toBeFalsy();
-    });
-
-    it(`isNumeric: ${pairs[0]}`, () => {
-      // TODO: find a cleaner way to do this
-      // NOTE: parseFloat will convert 7.2acdgs to 7.2
-      if (pairs[0].includes('trailing non-numeric')) {
-        expect(isFiniteNumeric(pairs[1])).toBeTruthy();
-      } else {
-        expect(isFiniteNumeric(pairs[1])).toBeFalsy();
-      }
-    });
-  }
+describe('number validators', () => {
+  it.each`
+    label                                      | value                | isFiniteNumber | isFiniteNumeric | isNumber | isNumeric
+    ${'integer literal: negative'}             | ${-1}                | ${true}        | ${true}         | ${true}  | ${true}
+    ${'integer literal: zero'}                 | ${0}                 | ${true}        | ${true}         | ${true}  | ${true}
+    ${'integer literal: positive'}             | ${1}                 | ${true}        | ${true}         | ${true}  | ${true}
+    ${'integer literal: octal'}                | ${0o0144}            | ${true}        | ${true}         | ${true}  | ${true}
+    ${'integer literal: hexadecimal'}          | ${0xfff}             | ${true}        | ${true}         | ${true}  | ${true}
+    ${'floating point: nagative'}              | ${-1.1234}           | ${true}        | ${true}         | ${true}  | ${true}
+    ${'floating point: positive'}              | ${1.1234}            | ${true}        | ${true}         | ${true}  | ${true}
+    ${'floating point: exponential notation'}  | ${8e5}               | ${true}        | ${true}         | ${true}  | ${true}
+    ${'number-like string: negative'}          | ${'-1'}              | ${false}       | ${true}         | ${false} | ${true}
+    ${'number-like string: zero'}              | ${'0'}               | ${false}       | ${true}         | ${false} | ${true}
+    ${'number-like string: positive'}          | ${'1'}               | ${false}       | ${true}         | ${false} | ${true}
+    ${'number-like string: octal'}             | ${'040'}             | ${false}       | ${true}         | ${false} | ${true}
+    ${'number-like string: hexadecimal'}       | ${'0xFF'}            | ${false}       | ${true}         | ${false} | ${true}
+    ${'number-like string: zero padded'}       | ${'05'}              | ${false}       | ${true}         | ${false} | ${true}
+    ${'float string: negative'}                | ${'-1.1234'}         | ${false}       | ${true}         | ${false} | ${true}
+    ${'float string: positive'}                | ${'1.1234'}          | ${false}       | ${true}         | ${false} | ${true}
+    ${'float string: exponential notation'}    | ${'123e-2'}          | ${false}       | ${true}         | ${false} | ${true}
+    ${'float string: zero padded'}             | ${'01.1234'}         | ${false}       | ${true}         | ${false} | ${true}
+    ${'non-finite number: NaN'}                | ${Number.NaN}        | ${false}       | ${false}        | ${true}  | ${true}
+    ${'non-finite number: positive'}           | ${POSITIVE_INFINITY} | ${false}       | ${false}        | ${true}  | ${true}
+    ${'non-finite number: negative'}           | ${NEGATIVE_INFINITY} | ${false}       | ${false}        | ${true}  | ${true}
+    ${'non-finite number: positive primitive'} | ${INFINITY}          | ${false}       | ${false}        | ${true}  | ${true}
+    ${'non-finite number: negative primitive'} | ${-INFINITY}         | ${false}       | ${false}        | ${true}  | ${true}
+    ${'non-finite string: NaN string'}         | ${'NaN'}             | ${false}       | ${false}        | ${false} | ${true}
+    ${'non-finite string: positive'}           | ${'Infinity'}        | ${false}       | ${false}        | ${false} | ${true}
+    ${'non-finite string: negative'}           | ${'-Infinity'}       | ${false}       | ${false}        | ${false} | ${true}
+    ${'non-numeric: empty'}                    | ${''}                | ${false}       | ${false}        | ${false} | ${false}
+    ${'non-numeric: whitespace character'}     | ${'   '}             | ${false}       | ${false}        | ${false} | ${false}
+    ${'non-numeric: tab character'}            | ${'\t\t'}            | ${false}       | ${false}        | ${false} | ${false}
+    ${'non-numeric: alphanumeric '}            | ${'abcdefghi123456'} | ${false}       | ${false}        | ${false} | ${false}
+    ${'non-numeric: non-numeric '}             | ${'xabcdefx'}        | ${false}       | ${false}        | ${false} | ${false}
+    ${'non-numeric: preceding non-numeric'}    | ${'bcfed5.2'}        | ${false}       | ${false}        | ${false} | ${false}
+    ${'non-numeric: literal true'}             | ${true}              | ${false}       | ${false}        | ${false} | ${false}
+    ${'non-numeric: literal false'}            | ${false}             | ${false}       | ${false}        | ${false} | ${false}
+    ${'non-numeric: undefined'}                | ${undefined}         | ${false}       | ${false}        | ${false} | ${false}
+    ${'non-numeric: null'}                     | ${null}              | ${false}       | ${false}        | ${false} | ${false}
+    ${'non-numeric: date object'}              | ${new Date()}        | ${false}       | ${false}        | ${false} | ${false}
+    ${'non-numeric: object'}                   | ${{}}                | ${false}       | ${false}        | ${false} | ${false}
+    ${'non-numeric: function instance'}        | ${() => void 0}      | ${false}       | ${false}        | ${false} | ${false}
+  `('$label', ({ value, ...expected }) => {
+    expect(isFiniteNumber(value)).toBe(expected.isFiniteNumber);
+    expect(isFiniteNumeric(value)).toBe(expected.isFiniteNumeric);
+    expect(isNumber(value)).toBe(expected.isNumber);
+    expect(isNumeric(value)).toBe(expected.isNumeric);
+  });
+
+  it('should be different for number with trailing non-numeric characters', () => {
+    const value = '7.2abcdef';
+
+    expect(isFiniteNumber(value)).toBe(false);
+    expect(isNumber(value)).toBe(false);
+
+    // NOTE: these differ from it.each testing above
+    // parseFloat will convert value to 7.2 just fine
+    expect(isFiniteNumeric(value)).toBe(true);
+    expect(isNumeric(value)).toBe(true);
+  });
 });
diff --git a/packages/predicates/src/is-string/index.test.ts b/packages/predicates/src/is-string/index.test.ts
index 8829e73d..aafb03cc 100644
--- a/packages/predicates/src/is-string/index.test.ts
+++ b/packages/predicates/src/is-string/index.test.ts
@@ -15,9 +15,10 @@ import { isString } from './';
 import { nonStringPairs } from './__fixtures__';
 
 describe('string validators', () => {
-  for (const pair of nonStringPairs) {
-    it(`isString: ${pair[0]}`, () => {
-      expect(isString(pair[1])).toBeFalsy();
-    });
-  }
+  it.each(nonStringPairs)(
+    'isString(%s) should be false',
+    (_expected, value) => {
+      expect(isString(value)).toBeFalsy();
+    },
+  );
 });
diff --git a/packages/predicates/src/is-worker/index.test.ts b/packages/predicates/src/is-worker/index.test.ts
index cf706453..bec9f670 100644
--- a/packages/predicates/src/is-worker/index.test.ts
+++ b/packages/predicates/src/is-worker/index.test.ts
@@ -14,34 +14,18 @@ import '@vitest/web-worker';
 import { describe, it, expect } from 'vitest';
 import { isSharedWorker, isWorker } from './';
 
-const nonWorkerPairs = [
-  ['array', []],
-  ['object', {}],
-  [
-    'function',
-    () => {
-      // noop
-    },
-  ],
-] as const;
-
 const workerUrl = new URL('./__fixtures__/worker.ts', import.meta.url);
-const sharedWorker = new SharedWorker(workerUrl);
-const worker = new Worker(workerUrl);
 
 describe('worker validators', () => {
-  expect(isSharedWorker(sharedWorker)).toBeTruthy();
-  expect(isSharedWorker(worker)).toBeFalsy();
-  expect(isWorker(worker)).toBeTruthy();
-  expect(isWorker(sharedWorker)).toBeFalsy();
-
-  for (const pair of nonWorkerPairs) {
-    it(`isSharedWorker: ${pair[0]}`, () => {
-      expect(isSharedWorker(pair[1])).toBeFalsy();
-    });
-
-    it(`isWorker: ${pair[0]}`, () => {
-      expect(isWorker(pair[1])).toBeFalsy();
-    });
-  }
+  it.each`
+    label             | value                          | isShared | isWorker
+    ${'array'}        | ${[]}                          | ${false} | ${false}
+    ${'object'}       | ${{}}                          | ${false} | ${false}
+    ${'function'}     | ${() => void 0}                | ${false} | ${false}
+    ${'SharedWorker'} | ${new SharedWorker(workerUrl)} | ${true}  | ${false}
+    ${'Worker'}       | ${new Worker(workerUrl)}       | ${false} | ${true}
+  `('$label', ({ value, ...expected }) => {
+    expect(isSharedWorker(value)).toBe(expected.isShared);
+    expect(isWorker(value)).toBe(expected.isWorker);
+  });
 });