diff --git a/csharp/src/Google.Protobuf.Test/testprotos.pb b/csharp/src/Google.Protobuf.Test/testprotos.pb
index e1cef477c3..106ada82c7 100644
Binary files a/csharp/src/Google.Protobuf.Test/testprotos.pb and b/csharp/src/Google.Protobuf.Test/testprotos.pb differ
diff --git a/protobuf.bzl b/protobuf.bzl
index f41b8f3a17..d96eeb4c9a 100644
--- a/protobuf.bzl
+++ b/protobuf.bzl
@@ -307,6 +307,7 @@ def _internal_gen_well_known_protos_java_impl(ctx):
         inputs = descriptors,
         outputs = [srcjar],
         arguments = [args],
+        mnemonic = "ProtoCompile",
         use_default_shell_env = True,
     )
 
@@ -369,6 +370,7 @@ def _internal_gen_kt_protos(ctx):
         inputs = descriptors,
         outputs = [srcjar],
         arguments = [args],
+        mnemonic = "ProtoCompile",
         use_default_shell_env = True,
     )