diff --git a/test/ruby/test_process.rb b/test/ruby/test_process.rb
index 94441db244..cd45bde99d 100644
--- a/test/ruby/test_process.rb
+++ b/test/ruby/test_process.rb
@@ -2138,7 +2138,7 @@ EOS
   end
 
   def test_deadlock_by_signal_at_forking
-    assert_separately(["-", RUBY], <<-INPUT, timeout: 60)
+    assert_separately(["-", RUBY], <<-INPUT, timeout: 80)
       ruby = ARGV.shift
       GC.start # reduce garbage
       GC.disable # avoid triggering CoW after forks
diff --git a/test/ruby/test_require.rb b/test/ruby/test_require.rb
index 7b5b79d862..dbd6117ba2 100644
--- a/test/ruby/test_require.rb
+++ b/test/ruby/test_require.rb
@@ -697,7 +697,7 @@ class TestRequire < Test::Unit::TestCase
     bug7530 = '[ruby-core:50645]'
     Tempfile.create(%w'bug-7530- .rb') {|script|
       script.close
-      assert_in_out_err([{"RUBYOPT" => nil}, "-", script.path], <<-INPUT, %w(:ok), [], bug7530, timeout: 40)
+      assert_in_out_err([{"RUBYOPT" => nil}, "-", script.path], <<-INPUT, %w(:ok), [], bug7530, timeout: 60)
         PATH = ARGV.shift
         THREADS = 4
         ITERATIONS_PER_THREAD = 1000