diff --git a/src/Bicep.Types.Az.UnitTests/Bicep.Types.Az.UnitTests.csproj b/src/Bicep.Types.Az.UnitTests/Bicep.Types.Az.UnitTests.csproj
index 72146af55f..bdf1f364e3 100644
--- a/src/Bicep.Types.Az.UnitTests/Bicep.Types.Az.UnitTests.csproj
+++ b/src/Bicep.Types.Az.UnitTests/Bicep.Types.Az.UnitTests.csproj
@@ -9,7 +9,7 @@
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     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
     <PackageReference Include="MSTest.TestAdapter" Version="3.11.0" />
-    <PackageReference Include="MSTest.TestFramework" Version="3.10.0" />
+    <PackageReference Include="MSTest.TestFramework" Version="4.0.1" />
     <PackageReference Include="coverlet.collector" Version="6.0.4">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
diff --git a/src/Bicep.Types.Az.UnitTests/packages.lock.json b/src/Bicep.Types.Az.UnitTests/packages.lock.json
index 3cd4e68303..7219c936bd 100644
--- a/src/Bicep.Types.Az.UnitTests/packages.lock.json
+++ b/src/Bicep.Types.Az.UnitTests/packages.lock.json
@@ -49,11 +49,11 @@
       },
       "MSTest.TestFramework": {
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-        "resolved": "3.10.0",
-        "contentHash": "G0LStK5LWTzMaM052tBKeWt8S2psHz/UXmsN5XTsLDqCzEl/Q7ysMvlOP/iVd+WDUMse76T66LV160mvqg+87A==",
+        "requested": "[4.0.1, )",
+        "resolved": "4.0.1",
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         "dependencies": {
-          "MSTest.Analyzers": "3.10.0"
+          "MSTest.Analyzers": "4.0.1"
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       "Nerdbank.GitVersioning": {
@@ -164,8 +164,8 @@
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       "MSTest.Analyzers": {
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+        "resolved": "4.0.1",
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       },
       "Newtonsoft.Json": {
         "type": "Transitive",