diff --git a/tools/Test/SmokeTest/InstallAzModules.ps1 b/tools/Test/SmokeTest/InstallAzModules.ps1
index 8982e959a0a6..f82a55990424 100644
--- a/tools/Test/SmokeTest/InstallAzModules.ps1
+++ b/tools/Test/SmokeTest/InstallAzModules.ps1
@@ -45,7 +45,7 @@ Install-Module -Name Az -Repository $gallery -Scope CurrentUser -AllowClobber -F
 
 $file = Get-ChildItem $localRepoLocation | Where-Object {$_.Name -like "ThreadJob*"}
 $installedModule = Get-Module -ListAVailable -Name ThreadJob
-if ($file -ne $null -and $installedModule -ne $null) {
+if ($file -ne $null -and $installedModule -eq $null) {
   Write-Host "Install ThreadJob..."
   Install-Module -Name ThreadJob -Repository $gallery -Scope CurrentUser -AllowClobber -Force
 }