diff --git a/ruby-runner.c b/ruby-runner.c
index b5a2e50659..99be4a0013 100644
--- a/ruby-runner.c
+++ b/ruby-runner.c
@@ -43,10 +43,6 @@ insert_env_path(const char *envname, const char *paths, size_t size, int prepend
     setenv(envname, env, 1);
 }
 
-/* force to link libm for fiddle test */
-#include <math.h>
-double (*const ruby_libm_func)(double) = log;
-
 #define EXTOUT_DIR BUILDDIR"/"EXTOUT
 int
 main(int argc, char **argv)
diff --git a/test/fiddle/test_pointer.rb b/test/fiddle/test_pointer.rb
index 27a8a6cb06..b1122aa9c5 100644
--- a/test/fiddle/test_pointer.rb
+++ b/test/fiddle/test_pointer.rb
@@ -152,11 +152,7 @@ module Fiddle
     def test_free=
       assert_normal_exit(<<-"End", '[ruby-dev:39269]')
         require 'fiddle'
-        Fiddle::LIBC_SO = #{Fiddle::LIBC_SO.dump}
-        Fiddle::LIBM_SO = #{Fiddle::LIBM_SO.dump}
         include Fiddle
-        @libc = dlopen(LIBC_SO)
-        @libm = dlopen(LIBM_SO)
         free = Fiddle::Function.new(Fiddle::RUBY_FREE, [TYPE_VOIDP], TYPE_VOID)
         ptr = Fiddle::Pointer.malloc(4)
         ptr.free = free