diff --git a/test/objspace/test_objspace.rb b/test/objspace/test_objspace.rb
index 326cf22e1f..e35fc0c14e 100644
--- a/test/objspace/test_objspace.rb
+++ b/test/objspace/test_objspace.rb
@@ -309,7 +309,7 @@ class TestObjSpace < Test::Unit::TestCase
   def test_trace_object_allocations_compaction_freed_pages
     omit "compaction is not supported on this platform" unless GC.respond_to?(:compact)
 
-    assert_normal_exit(<<~RUBY)
+    assert_normal_exit(<<~RUBY, timeout: 60)
       require "objspace"
 
       objs = []
diff --git a/test/ruby/test_ractor.rb b/test/ruby/test_ractor.rb
index e2573153a3..1e06dfd83a 100644
--- a/test/ruby/test_ractor.rb
+++ b/test/ruby/test_ractor.rb
@@ -165,7 +165,7 @@ class TestRactor < Test::Unit::TestCase
   # [Bug #21398]
   def test_port_receive_dnt_with_port_send
     omit 'unstable on macos-14' if RUBY_PLATFORM =~ /darwin/
-    assert_ractor(<<~'RUBY', timeout: 30)
+    assert_ractor(<<~'RUBY', timeout: 90)
       THREADS = 10
       JOBS_PER_THREAD = 50
       ARRAY_SIZE = 20_000