diff --git a/src/Microsoft.CodeAnalysis.Analyzers/Core/AnalyzerBannedSymbols.txt b/src/Microsoft.CodeAnalysis.Analyzers/Core/AnalyzerBannedSymbols.txt
index 8535d3fcea..26c7ef96ed 100644
--- a/src/Microsoft.CodeAnalysis.Analyzers/Core/AnalyzerBannedSymbols.txt
+++ b/src/Microsoft.CodeAnalysis.Analyzers/Core/AnalyzerBannedSymbols.txt
@@ -2,6 +2,7 @@ T:System.IO.File; Do not do file IO in analyzers
 T:System.IO.Directory; Do not do file IO in analyzers
 M:System.IO.Path.GetTempPath; Do not do file IO in analyzers
 T:System.Environment; Analyzers should not read their settings directly from environment variables
+T:System.Random; Analyzers should be deterministic
 M:System.Reflection.Assembly.Load(System.Byte[]); Analyzers should only load their dependencies via standard runtime mechanisms
 M:System.Reflection.Assembly.Load(System.String); Analyzers should only load their dependencies via standard runtime mechanisms
 M:System.Reflection.Assembly.Load(System.Reflection.AssemblyName); Analyzers should only load their dependencies via standard runtime mechanisms
@@ -9,4 +10,4 @@ M:System.Reflection.Assembly.Load(System.Byte[],System.Byte[]); Analyzers should
 P:System.Globalization.CultureInfo.CurrentCulture; Analyzers should use the locale given by the compiler command line arguments, not the CurrentCulture
 P:System.Globalization.CultureInfo.CurrentUICulture; Analyzers should use the locale given by the compiler command line arguments, not the CurrentUICulture
 T:Microsoft.CodeAnalysis.GeneratorInitializationContext; Non-incremental source generators should not be used, implement IIncrementalGenerator instead
-T:Microsoft.CodeAnalysis.GeneratorExecutionContext; Non-incremental source generators should not be used, implement IIncrementalGenerator instead
\ No newline at end of file
+T:Microsoft.CodeAnalysis.GeneratorExecutionContext; Non-incremental source generators should not be used, implement IIncrementalGenerator instead