diff --git a/scripts/linting/Validate-SkillStructure.ps1 b/scripts/linting/Validate-SkillStructure.ps1
index 3fd83ecba..d01a34fa8 100644
--- a/scripts/linting/Validate-SkillStructure.ps1
+++ b/scripts/linting/Validate-SkillStructure.ps1
@@ -475,7 +475,7 @@ function Write-SkillValidationResults {
     }
 
     $jsonOutput = @{
-        timestamp    = (Get-Date -Format 'o')
+        timestamp    = Get-StandardTimestamp
         totalSkills  = $totalSkills
         skillErrors  = $errorCount
         skillWarnings = $warningCount
diff --git a/scripts/tests/linting/Validate-SkillStructure.Tests.ps1 b/scripts/tests/linting/Validate-SkillStructure.Tests.ps1
index fbc006366..bbc7dd1eb 100644
--- a/scripts/tests/linting/Validate-SkillStructure.Tests.ps1
+++ b/scripts/tests/linting/Validate-SkillStructure.Tests.ps1
@@ -823,8 +823,8 @@ Describe 'Write-SkillValidationResults' -Tag 'Unit' {
             Write-SkillValidationResults -Results $results -RepoRoot $repoRoot
 
             $jsonPath = Join-Path $repoRoot 'logs/skill-validation-results.json'
-            $json = Get-Content $jsonPath -Raw | ConvertFrom-Json
-            $json.timestamp | Should -Not -BeNullOrEmpty
+            $raw = Get-Content $jsonPath -Raw
+            $raw | Should -Match '"timestamp":\s*"\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\.\d+Z"'
         }
     }