diff --git a/eng/Versions.props b/eng/Versions.props
index 95ba1fe9e01e..b1e6b5ffb141 100644
--- a/eng/Versions.props
+++ b/eng/Versions.props
@@ -6,7 +6,7 @@
     <MinorVersion>0</MinorVersion>
     <PatchVersion>100</PatchVersion>
     <PreReleaseVersionLabel>preview</PreReleaseVersionLabel>
-    <PreReleaseVersionIteration>2</PreReleaseVersionIteration>
+    <PreReleaseVersionIteration>5</PreReleaseVersionIteration>
     <StabilizePackageVersion Condition="'$(StabilizePackageVersion)' == ''">false</StabilizePackageVersion>
     <DotNetFinalVersionKind Condition="'$(StabilizePackageVersion)' == 'true'">release</DotNetFinalVersionKind>
   </PropertyGroup>
diff --git a/global.json b/global.json
index 1a5da7e148a8..4dc3e838b8c1 100644
--- a/global.json
+++ b/global.json
@@ -1,6 +1,6 @@
 {
   "tools": {
-    "dotnet": "6.0.100-preview.4.21179.4",
+    "dotnet": "6.0.100-preview.5.21225.11",
     "runtimes": {
       "dotnet": [
         "5.0.0"
diff --git a/test/Mono.Linker.Tests/TestCasesRunner/ResultChecker.cs b/test/Mono.Linker.Tests/TestCasesRunner/ResultChecker.cs
index 66ee602a56b5..103e60eaccc6 100644
--- a/test/Mono.Linker.Tests/TestCasesRunner/ResultChecker.cs
+++ b/test/Mono.Linker.Tests/TestCasesRunner/ResultChecker.cs
@@ -998,9 +998,9 @@ void VerifyRecordedReflectionPatterns (AssemblyDefinition original, TestReflecti
 						// By now all verified recorded patterns were removed from the test recorder lists, so validate
 						// that there are no remaining patterns for this type.
 						var recognizedPatternsForType = reflectionPatternRecorder.RecognizedPatterns
-							.Where (pattern => pattern.Source.DeclaringType?.FullName == typeToVerify.FullName);
+							.Where (pattern => pattern.Source?.DeclaringType?.FullName == typeToVerify.FullName);
 						var unrecognizedPatternsForType = reflectionPatternRecorder.UnrecognizedPatterns
-							.Where (pattern => pattern.Source.DeclaringType?.FullName == typeToVerify.FullName);
+							.Where (pattern => pattern.Source?.DeclaringType?.FullName == typeToVerify.FullName);
 
 						if (recognizedPatternsForType.Any () || unrecognizedPatternsForType.Any ()) {
 							string recognizedPatterns = string.Join (Environment.NewLine, recognizedPatternsForType