diff --git a/src/System.Management.Automation/engine/parser/Parser.cs b/src/System.Management.Automation/engine/parser/Parser.cs
index e1788d5996f..72d6dbbd276 100644
--- a/src/System.Management.Automation/engine/parser/Parser.cs
+++ b/src/System.Management.Automation/engine/parser/Parser.cs
@@ -280,7 +280,7 @@ internal static ITypeName ScanType(string typename, bool ignoreErrors)
             var result = parser.TypeNameRule(allowAssemblyQualifiedNames: true, firstTypeNameToken: out _);
 
             SemanticChecks.CheckArrayTypeNameDepth(result, PositionUtilities.EmptyExtent, parser);
-            if (!ignoreErrors && parser.ErrorList.Count > 0)
+            if (!ignoreErrors && result is not null && (parser.ErrorList.Count > 0 || !result.Extent.Text.Equals(typename, StringComparison.OrdinalIgnoreCase)))
             {
                 result = null;
             }
diff --git a/test/powershell/Language/Parser/Conversions.Tests.ps1 b/test/powershell/Language/Parser/Conversions.Tests.ps1
index 119f74d9a8a..f6874b1db93 100644
--- a/test/powershell/Language/Parser/Conversions.Tests.ps1
+++ b/test/powershell/Language/Parser/Conversions.Tests.ps1
@@ -78,6 +78,14 @@ Describe 'conversion syntax' -Tags "CI" {
             $result -join ";" | Should -Be ($Elements -join ";")
         }
     }
+
+    It 'Should not convert invalid strings to type name using -as operator' {
+        'int]whatever' -as [type] | Should -Be $null
+    }
+    
+    It 'Should not convert invalid strings to type name using left-hand side operator' {
+        {[Type] 'int]whatever'} | Should -Throw
+    }
 }
 
 Describe "Type resolution should prefer assemblies in powershell assembly cache" -Tags "Feature" {