diff --git a/Tests/Directory.Build.props b/Tests/Directory.Build.props
index e35e0f52..4d2d629c 100644
--- a/Tests/Directory.Build.props
+++ b/Tests/Directory.Build.props
@@ -8,7 +8,7 @@
     </PackageReference>
     <PackageReference Include="JunitXml.TestLogger" Version="8.0.0"/>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.0.1"/>
-    <PackageReference Include="Microsoft.TestPlatform.ObjectModel" Version="18.0.1"/>
+    <PackageReference Include="Microsoft.TestPlatform.ObjectModel" Version="18.3.0"/>
     <PackageReference Include="Moq" Version="4.20.72"/>
     <PackageReference Include="xunit" Version="2.9.3"/>
     <PackageReference Include="xunit.runner.visualstudio" PrivateAssets="All" Version="3.1.5">
diff --git a/Tests/Schema.NET.Test/packages.lock.json b/Tests/Schema.NET.Test/packages.lock.json
index 5d4b483e..d3acba95 100644
--- a/Tests/Schema.NET.Test/packages.lock.json
+++ b/Tests/Schema.NET.Test/packages.lock.json
@@ -26,9 +26,9 @@
       },
       "Microsoft.TestPlatform.ObjectModel": {
         "type": "Direct",
-        "requested": "[18.0.1, )",
-        "resolved": "18.0.1",
-        "contentHash": "qT/mwMcLF9BieRkzOBPL2qCopl8hQu6A1P7JWAoj/FMu5i9vds/7cjbJ/LLtaiwWevWLAeD5v5wjQJ/l6jvhWQ=="
+        "requested": "[18.3.0, )",
+        "resolved": "18.3.0",
+        "contentHash": "AEIEX2aWdPO9XbtR96eBaJxmXRD9vaI9uQ1T/JbPEKlTAZwYx0ZrMzKyULMdh/HH9Sg03kXCoN7LszQ90o6nPQ=="
       },
       "MinVer": {
         "type": "Direct",