diff --git a/grpc.spec b/grpc.spec
index c22ac29..80b0cda 100644
--- a/grpc.spec
+++ b/grpc.spec
@@ -657,6 +657,8 @@ do
   %py3_install
   popd >/dev/null
 done
+# The grpcio_tests package should not be installed; it would provide top-level
+# packages with generic names like “tests” or “tests_aio”.
 
 # ~~~~ Miscellaneous ~~~~