1 files changed, 6 insertions, 0 deletions
diff --git a/test/lib/jit_support.rb b/test/lib/jit_support.rb
index 1b15f685a0..79fdbcce48 100644
--- a/test/lib/jit_support.rb
+++ b/test/lib/jit_support.rb
@@ -16,4 +16,10 @@ module JITSupport
   def yjit_force_enabled?
     "#{RbConfig::CONFIG['CFLAGS']} #{RbConfig::CONFIG['CPPFLAGS']}".match?(/(\A|\s)-D ?YJIT_FORCE_ENABLE\b/)
   end
+
+  def zjit_supported?
+    return @zjit_supported if defined?(@zjit_supported)
+    # nil in mswin
+    @zjit_supported = ![nil, 'no'].include?(RbConfig::CONFIG['ZJIT_SUPPORT'])
+  end
 end