diff --git a/plugins/machine-health/.claude-plugin/plugin.json b/plugins/machine-health/.claude-plugin/plugin.json
index 87ae06fabf..521c7d1c40 100644
--- a/plugins/machine-health/.claude-plugin/plugin.json
+++ b/plugins/machine-health/.claude-plugin/plugin.json
@@ -1,7 +1,7 @@
 {
   "$schema": "https://json.schemastore.org/claude-code-plugin-manifest.json",
   "name": "machine-health",
-  "version": "0.13.0",
+  "version": "0.13.1",
   "description": "Workstation health audit: OS-specific checks (disk, OS updates, security posture, CISA KEV correlation) run from a versioned catalog with trend-aware severity, approval-gated remediations, and dated markdown reports. Windows fully implemented; macOS/Linux scaffolded (report UNKNOWN and stop). Machine state persists in the plugin data directory; the report directory and check catalog are configurable.",
   "author": {
     "name": "Melodic Software",
diff --git a/plugins/machine-health/CHANGELOG.md b/plugins/machine-health/CHANGELOG.md
index c60387ed7c..ec60c1ac72 100644
--- a/plugins/machine-health/CHANGELOG.md
+++ b/plugins/machine-health/CHANGELOG.md
@@ -3,6 +3,14 @@
 All notable changes to the `machine-health` plugin are documented here. Format follows
 [Keep a Changelog](https://keepachangelog.com/en/1.1.0/); this plugin uses semantic versioning.
 
+## [0.13.1] - 2026-09-23
+
+### Fixed
+
+- The test helper module `Mock-Helpers.psm1` no longer calls `Export-ModuleMember`, which
+  triggers an intermittent PSScriptAnalyzer 1.25.0 NullReferenceException. It still exports
+  the same 14 functions.
+
 ## [0.13.0] - 2026-09-23
 
 ### Changed
diff --git a/plugins/machine-health/skills/audit/tests/helpers/Mock-Helpers.psm1 b/plugins/machine-health/skills/audit/tests/helpers/Mock-Helpers.psm1
index e0bc20854f..efc2c06baa 100644
--- a/plugins/machine-health/skills/audit/tests/helpers/Mock-Helpers.psm1
+++ b/plugins/machine-health/skills/audit/tests/helpers/Mock-Helpers.psm1
@@ -292,20 +292,3 @@ function Remove-MachineHealthTempDir {
         }
     }
 }
-
-Export-ModuleMember -Function @(
-    'New-MachineHealthTempDir'
-    'New-MockBattery'
-    'New-MockDefenderComputerStatus'
-    'New-MockDriver'
-    'New-MockEnvironmentKey'
-    'New-MockEventLogRecord'
-    'New-MockPartition'
-    'New-MockPhysicalDisk'
-    'New-MockReliabilityCounter'
-    'New-MockReliabilityRecord'
-    'New-MockReliabilityStabilityMetric'
-    'New-MockService'
-    'New-MockVolume'
-    'Remove-MachineHealthTempDir'
-)