diff --git a/test/rubygems/test_gem_commands_exec_command.rb b/test/rubygems/test_gem_commands_exec_command.rb
index ef1bd3b9d3..f2f6be7e8c 100644
--- a/test/rubygems/test_gem_commands_exec_command.rb
+++ b/test/rubygems/test_gem_commands_exec_command.rb
@@ -216,6 +216,8 @@ class TestGemCommandsExecCommand < Gem::TestCase
   end
 
   def test_gem_with_platform_and_platform_dependencies
+    pend "extensions don't quite work on jruby" if Gem.java_platform?
+
     platforms = Gem.platforms.dup
 
     spec_fetcher do |fetcher|