diff --git a/test/support/cdp_utils.rb b/test/support/cdp_utils.rb
index a6c927c64..144904eab 100644
--- a/test/support/cdp_utils.rb
+++ b/test/support/cdp_utils.rb
@@ -63,7 +63,7 @@ def connect_to_cdp_server
       MSG
     end
 
-    TIMEOUT_SEC = (ENV['RUBY_DEBUG_TIMEOUT_SEC'] || 30).to_i
+    TIMEOUT_SEC = (ENV['RUBY_DEBUG_TIMEOUT_SEC'] || 10).to_i
     HOST = '127.0.0.1'
 
     def run_cdp_scenario program, &msgs
diff --git a/test/support/dap_utils.rb b/test/support/dap_utils.rb
index 69c305c2f..634f70792 100644
--- a/test/support/dap_utils.rb
+++ b/test/support/dap_utils.rb
@@ -96,7 +96,7 @@ def connect_to_dap_server test_info
       sock
     end
 
-    TIMEOUT_SEC = (ENV['RUBY_DEBUG_TIMEOUT_SEC'] || 30).to_i
+    TIMEOUT_SEC = (ENV['RUBY_DEBUG_TIMEOUT_SEC'] || 10).to_i
 
     def run_dap_scenario program, &msgs
       begin
diff --git a/test/support/protocol_test_case.rb b/test/support/protocol_test_case.rb
index 71cf11a05..902955c0d 100644
--- a/test/support/protocol_test_case.rb
+++ b/test/support/protocol_test_case.rb
@@ -644,7 +644,7 @@ def send **kw
       end
     end
 
-    TIMEOUT_SEC = (ENV['RUBY_DEBUG_TIMEOUT_SEC'] || 30).to_i
+    TIMEOUT_SEC = (ENV['RUBY_DEBUG_TIMEOUT_SEC'] || 10).to_i
 
     def assert_dap_response expected_def, result_res
       return unless defined? DAP_HASH
diff --git a/test/support/test_case.rb b/test/support/test_case.rb
index 0704a4bb2..fae5b9f58 100644
--- a/test/support/test_case.rb
+++ b/test/support/test_case.rb
@@ -96,7 +96,7 @@ def debug_print msg
     RUBY = ENV['RUBY'] || RbConfig.ruby
     RDBG_EXECUTABLE = "#{RUBY} #{__dir__}/../../exe/rdbg"
 
-    TIMEOUT_SEC = (ENV['RUBY_DEBUG_TIMEOUT_SEC'] || 30).to_i
+    TIMEOUT_SEC = (ENV['RUBY_DEBUG_TIMEOUT_SEC'] || 10).to_i
 
     def get_target_ui
       ENV['RUBY_DEBUG_TEST_UI']