diff --git a/packages/starlight-links-validator/libs/remark.ts b/packages/starlight-links-validator/libs/remark.ts
index 60648f9..0b2f3e4 100644
--- a/packages/starlight-links-validator/libs/remark.ts
+++ b/packages/starlight-links-validator/libs/remark.ts
@@ -6,6 +6,7 @@ import GitHubSlugger, { slug } from 'github-slugger'
 import type { Nodes } from 'hast'
 import { fromHtml } from 'hast-util-from-html'
 import { hasProperty } from 'hast-util-has-property'
+import isAbsoluteUrl from 'is-absolute-url'
 import type { Root } from 'mdast'
 import type { MdxJsxAttribute, MdxJsxExpressionAttribute } from 'mdast-util-mdx-jsx'
 import { toString } from 'mdast-util-to-string'
@@ -133,7 +134,7 @@ export function getValidationData() {
 }
 
 function isInternalLink(link: string) {
-  return nodePath.isAbsolute(link) || link.startsWith('#') || link.startsWith('.')
+  return !isAbsoluteUrl(link)
 }
 
 function normalizeFilePath(base: string, filePath?: string) {
diff --git a/packages/starlight-links-validator/libs/validation.ts b/packages/starlight-links-validator/libs/validation.ts
index 073364f..a88546d 100644
--- a/packages/starlight-links-validator/libs/validation.ts
+++ b/packages/starlight-links-validator/libs/validation.ts
@@ -113,7 +113,7 @@ function validateLink(context: ValidationContext) {
     throw new Error('Failed to validate a link with no path.')
   }
 
-  if (path.startsWith('.')) {
+  if (path.startsWith('.') || !link.startsWith('/')) {
     if (options.errorOnRelativeLinks) {
       addError(errors, filePath, link, ValidationErrorType.RelativeLink)
     }
diff --git a/packages/starlight-links-validator/package.json b/packages/starlight-links-validator/package.json
index d5b3abc..d94a278 100644
--- a/packages/starlight-links-validator/package.json
+++ b/packages/starlight-links-validator/package.json
@@ -17,6 +17,7 @@
     "github-slugger": "2.0.0",
     "hast-util-from-html": "2.0.1",
     "hast-util-has-property": "3.0.0",
+    "is-absolute-url": "4.0.1",
     "kleur": "4.1.5",
     "mdast-util-to-string": "4.0.0",
     "unist-util-visit": "5.0.0"
diff --git a/packages/starlight-links-validator/tests/basics.test.ts b/packages/starlight-links-validator/tests/basics.test.ts
index 7b83c1d..4485937 100644
--- a/packages/starlight-links-validator/tests/basics.test.ts
+++ b/packages/starlight-links-validator/tests/basics.test.ts
@@ -18,7 +18,7 @@ test('should not build with invalid links', async () => {
   try {
     await loadFixture('basics-invalid-links')
   } catch (error) {
-    expectValidationErrorCount(error, 25, 4)
+    expectValidationErrorCount(error, 26, 4)
 
     expectValidationErrors(error, 'test/', [
       ['/', ValidationErrorType.InvalidLink],
@@ -55,6 +55,7 @@ test('should not build with invalid links', async () => {
       ['./test', ValidationErrorType.RelativeLink],
       ['./guides/example', ValidationErrorType.RelativeLink],
       ['../test', ValidationErrorType.RelativeLink],
+      ['test', ValidationErrorType.RelativeLink],
     ])
   }
 })
diff --git a/packages/starlight-links-validator/tests/fixtures/basics-invalid-links/src/content/docs/relative.md b/packages/starlight-links-validator/tests/fixtures/basics-invalid-links/src/content/docs/relative.md
index af5f41b..f03f0c3 100644
--- a/packages/starlight-links-validator/tests/fixtures/basics-invalid-links/src/content/docs/relative.md
+++ b/packages/starlight-links-validator/tests/fixtures/basics-invalid-links/src/content/docs/relative.md
@@ -7,3 +7,4 @@ title: Relative
 - [Link to another page in the same directory](./test)
 - [Link to another page in another directory](./guides/example)
 - [Link to another page in a parent directory](../test)
+- [Another link to another page in the same directory](test)
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 60d6217..fbe4453 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -71,6 +71,9 @@ importers:
       hast-util-has-property:
         specifier: 3.0.0
         version: 3.0.0
+      is-absolute-url:
+        specifier: 4.0.1
+        version: 4.0.1
       kleur:
         specifier: 4.1.5
         version: 4.1.5
@@ -3344,6 +3347,11 @@ packages:
       side-channel: 1.0.4
     dev: true
 
+  /is-absolute-url@4.0.1:
+    resolution: {integrity: sha512-/51/TKE88Lmm7Gc4/8btclNXWS+g50wXhYJq8HWIBAGUBnoAdRu1aXeh364t/O7wXDAcTJDP8PNuNKWUDWie+A==}
+    engines: {node: ^12.20.0 || ^14.13.1 || >=16.0.0}
+    dev: false
+
   /is-alphabetical@2.0.1:
     resolution: {integrity: sha512-FWyyY60MeTNyeSRpkM2Iry0G9hpr7/9kD40mD/cGQEuilcZYS4okz8SN2Q6rLCJ8gbCt6fN+rC+6tMGS99LaxQ==}