1 files changed, 8 insertions, 2 deletions
diff --git a/test/fiddle/test_function.rb b/test/fiddle/test_function.rb
index b4b2df2874..6ec40bee06 100644
--- a/test/fiddle/test_function.rb
+++ b/test/fiddle/test_function.rb
@@ -41,6 +41,9 @@ module Fiddle
       if RUBY_ENGINE == "jruby"
         omit("rb_str_dup() doesn't exist in JRuby")
       end
+      if RUBY_ENGINE == "truffleruby"
+        omit("rb_str_dup() doesn't work with TruffleRuby")
+      end
 
       libruby = Fiddle.dlopen(nil)
       rb_str_dup = Function.new(libruby['rb_str_dup'],
@@ -109,8 +112,8 @@ module Fiddle
     end
 
     def test_last_error
-      if RUBY_ENGINE == "jruby"
-        omit("Fiddle.last_error doesn't work with JRuby")
+      if ffi_backend?
+        omit("Fiddle.last_error doesn't work with FFI backend")
       end
 
       func = Function.new(@libc['strcpy'], [TYPE_VOIDP, TYPE_VOIDP], TYPE_VOIDP)
@@ -219,6 +222,9 @@ module Fiddle
       if RUBY_ENGINE == "jruby"
         omit("rb_obj_frozen_p() doesn't exist in JRuby")
       end
+      if RUBY_ENGINE == "truffleruby"
+        omit("memory leak detection is fragile with TruffleRuby")
+      end
 
       if respond_to?(:assert_nothing_leaked_memory)
         rb_obj_frozen_p_symbol = Fiddle.dlopen(nil)["rb_obj_frozen_p"]