diff --git a/test/openssl/utils.rb b/test/openssl/utils.rb
index 1da3d8f797..f3f4bf3f56 100644
--- a/test/openssl/utils.rb
+++ b/test/openssl/utils.rb
@@ -266,8 +266,9 @@ class OpenSSL::SSLTestCase < OpenSSL::TestCase
         pend = nil
         threads.each { |th|
           begin
-            th.join(10) or
-              th.raise(RuntimeError, "[start_server] thread did not exit in 10 secs")
+            timeout = EnvUtil.apply_timeout_scale(10)
+            th.join(timeout) or
+              th.raise(RuntimeError, "[start_server] thread did not exit in #{ timeout } secs")
           rescue (defined?(MiniTest::Skip) ? MiniTest::Skip : Test::Unit::PendedError)
             # MiniTest::Skip is for the Ruby tree
             pend = $!