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