diff --git a/php/ext/google/protobuf/php-upb.c b/php/ext/google/protobuf/php-upb.c
index 640e5a4beb..67b9cfebfa 100644
--- a/php/ext/google/protobuf/php-upb.c
+++ b/php/ext/google/protobuf/php-upb.c
@@ -1,6 +1,8 @@
 /* Amalgamated source file */
 #include "php-upb.h"
 
+test-xyz
+
 /*
  * This is where we define internal portability macros used across upb.
  *
diff --git a/ruby/ext/google/protobuf_c/ruby-upb.c b/ruby/ext/google/protobuf_c/ruby-upb.c
index 23be9a1249..7bf191aad2 100644
--- a/ruby/ext/google/protobuf_c/ruby-upb.c
+++ b/ruby/ext/google/protobuf_c/ruby-upb.c
@@ -1,6 +1,8 @@
 /* Amalgamated source file */
 #include "ruby-upb.h"
 
+test-xyz
+
 /*
  * This is where we define internal portability macros used across upb.
  *