diff --git a/Tasks/Common/PowershellHelpers/Invoke-ActionWithRetries.ps1 b/Tasks/Common/PowershellHelpers/Invoke-ActionWithRetries.ps1
index 6f9968c769d7..99f9b7edfd2c 100644
--- a/Tasks/Common/PowershellHelpers/Invoke-ActionWithRetries.ps1
+++ b/Tasks/Common/PowershellHelpers/Invoke-ActionWithRetries.ps1
@@ -86,7 +86,7 @@ function Test-RetryableException {
     )
 
     $AllowedExceptions | ForEach-Object {
-        if($_ -and ([type]$_).IsAssignableFrom($Exception.GetType()))
+        if($_ -and ($Exception -is ([type]$_)))
         {
             return $true;
         }
diff --git a/Tasks/Common/PowershellHelpers/Tests/Invoke-ActionWithRetries.ShouldRetryOnException.ps1 b/Tasks/Common/PowershellHelpers/Tests/Invoke-ActionWithRetries.ShouldRetryOnException.ps1
index 38fc54c378c9..325f4f300e21 100644
--- a/Tasks/Common/PowershellHelpers/Tests/Invoke-ActionWithRetries.ShouldRetryOnException.ps1
+++ b/Tasks/Common/PowershellHelpers/Tests/Invoke-ActionWithRetries.ShouldRetryOnException.ps1
@@ -16,6 +16,6 @@ Register-Mock Start-Sleep {}
 
 # Act/Assert.
 Assert-Throws {
-    & $module Invoke-ActionWithRetries -Action $action -RetryableExceptions @("System.IO.FileNotFoundException")
+    & $module Invoke-ActionWithRetries -Action $action -RetryableExceptions @("System.IO.IOException")
 } -MessagePattern "File not found error!"
 Assert-AreEqual 10 $global:retriesAttempted "Number of retries not correct"