diff --git a/tool/rbs_skip_tests b/tool/rbs_skip_tests
index 873db5a641..94a52dcb87 100644
--- a/tool/rbs_skip_tests
+++ b/tool/rbs_skip_tests
@@ -46,3 +46,5 @@ test_new(RegexpSingletonTest)
 
 ## Failed tests caused by unreleased version of Ruby
 
+# https://github.com/ruby/openssl/pull/774
+test_params(OpenSSLDHTest)