diff --git a/gc/default/default.c b/gc/default/default.c
index bb889fecf873da..7a54f30b29b61f 100644
--- a/gc/default/default.c
+++ b/gc/default/default.c
@@ -9663,7 +9663,7 @@ gc_profile_disable(VALUE _)
     return Qnil;
 }
 
-void
+static void
 rb_gc_verify_internal_consistency(void)
 {
     gc_verify_internal_consistency(rb_gc_get_objspace());
diff --git a/test/ruby/test_settracefunc.rb b/test/ruby/test_settracefunc.rb
index e2cda4dfb82af7..b4af8fa98625b8 100644
--- a/test/ruby/test_settracefunc.rb
+++ b/test/ruby/test_settracefunc.rb
@@ -352,7 +352,7 @@ def test_break # [ruby-core:27606] [Bug #2610]
      2:   events << [event, lineno, mid, klass] if file == name
      3: })
      4: [1,2,3].any? {|n| n}
-     8: set_trace_func(nil)
+     5: set_trace_func(nil)
     EOF
 
     [["c-return", 1, :set_trace_func, Kernel],
diff --git a/tool/lib/leakchecker.rb b/tool/lib/leakchecker.rb
index 7bd479bbd3f83d..b1f94ea5d62d6b 100644
--- a/tool/lib/leakchecker.rb
+++ b/tool/lib/leakchecker.rb
@@ -122,18 +122,24 @@ def check_fd_leak(test_name)
           end
           if header = open_list&.shift
             columns = header.split
-            fd_index, node_index = columns.index('FD'), columns.index('NODE')
+            fd_index, type_index, node_index = %w'FD TYPE NODE'.map {|n| columns.index(n)}
             open_list.reject! do |of|
               of = of.chomp.split(' ', node_index + 2)
               if of[node_index] == 'TCP' and of.last.end_with?('(CLOSE_WAIT)', '(CLOSED)')
+                # Sometimes TCP sockets still live in the kernel space
+                # but have been closed in the user space.
+                skip = true
+              elsif of[type_index] == 'systm'
+                # AF_SYSTEM on macOS is kept alive
+                skip = true
+              end
+              if skip
                 fd = of[fd_index].to_i
                 inspect.delete(fd)
                 h.delete(fd)
                 live2.delete(fd)
-                true
-              else
-                false
               end
+              skip
             end
             puts(header, open_list) unless open_list.empty?
           end