diff --git a/csharp/.gitignore b/csharp/.gitignore
index 62c9638..56ac149 100644
--- a/csharp/.gitignore
+++ b/csharp/.gitignore
@@ -33,3 +33,8 @@
 
 # Benchmark output
 BenchmarkDotNet.Artifacts/
+
+# Reinstate generated code for test files
+!any_test.pb.*
+!map*unittest.pb.*
+!unittest*.pb.*