diff --git a/pystan/stan b/pystan/stan
index b3add46b..d0656535 160000
--- a/pystan/stan
+++ b/pystan/stan
@@ -1 +1 @@
-Subproject commit b3add46b4451fdca87f281c2f9d00e06532f1f96
+Subproject commit d0656535b697822445a3dfd7248d05f5933db8ad
diff --git a/pystan/tests/test_extra_compile_args.py b/pystan/tests/test_extra_compile_args.py
index df6371f9..a5df5f41 100644
--- a/pystan/tests/test_extra_compile_args.py
+++ b/pystan/tests/test_extra_compile_args.py
@@ -40,7 +40,6 @@ def test_extra_compile_args_failure(self):
             pystan.StanModel(model_code=model_code, model_name="normal1",
                              extra_compile_args=extra_compile_args)
 
-    @unittest.skip("temporarily disabled due to STAN_THREADS issue in Stan 2.20")
     def test_threading_support(self):
         # Dont test with Windows with MinGW-w64 (GCC)
         if sys.platform.startswith("win"):