1 files changed, 8 insertions, 0 deletions
diff --git a/test/ruby/test_process.rb b/test/ruby/test_process.rb
index 7bd38c8fed..f300444ecc 100644
--- a/test/ruby/test_process.rb
+++ b/test/ruby/test_process.rb
@@ -2339,4 +2339,12 @@ EOS
       assert_equal pid, Timeout.timeout(30) { Process.wait(pid) }
     end;
   end
+
+  if Process.respond_to?(:initgroups)
+    def test_initgroups
+      assert_raise(ArgumentError) do
+        Process.initgroups("\0", 0)
+      end
+    end
+  end
 end