diff --git a/src/predicate/isNumericString.ts b/src/predicate/isNumericString.ts
index 1354a9b..b067793 100644
--- a/src/predicate/isNumericString.ts
+++ b/src/predicate/isNumericString.ts
@@ -2,4 +2,4 @@ import { matching } from './factory/matching.js';
 
 import type { NumericString } from '../types/common.js';
 
-export const isNumericString = matching<NumericString>(/^[-+]?\d+(\.\d+)?$/);
+export const isNumericString = matching<NumericString>(/^[-+]?(\d+(\.\d+)?|\.\d+)$/);
diff --git a/test/predicate/isNumericString.test.ts b/test/predicate/isNumericString.test.ts
new file mode 100644
index 0000000..dfcc692
--- /dev/null
+++ b/test/predicate/isNumericString.test.ts
@@ -0,0 +1,20 @@
+import { describe, it, expect } from 'vitest';
+
+import { isNumericString } from '../../src/predicate/isNumericString.js';
+
+describe('isNumericString()', () => {
+  it.each(['1', '2.3', '-4', '+5.67', '.89', '-0', '+0'])('Returns true for valid input: %s', (input) => {
+    expect(isNumericString(input)).toBeTruthy();
+  });
+
+  it.each(['', 'not numeric', Symbol('test'), null, undefined, Number.MAX_SAFE_INTEGER])(
+    'Returns false for invalid input: %s',
+    (input) => {
+      expect(isNumericString(input)).toBeFalsy();
+    },
+  );
+
+  it('Can be used with Array.filter()', () => {
+    expect(['1', null, 2, undefined, '3.14'].filter(isNumericString)).toEqual(['1', '3.14']);
+  });
+});