diff --git a/tests/test_parity/tb_template.sv b/tests/test_parity/tb_template.sv
index a92b483..7f32452 100644
--- a/tests/test_parity/tb_template.sv
+++ b/tests/test_parity/tb_template.sv
@@ -24,8 +24,13 @@
     disable fork;
 
     cpuif.write('h0, 'd0);
+`ifdef XILINX_XSIM
+    assign dut.field_storage.r1.f1.value = 16'd1;
+    deassign dut.field_storage.r1.f1.value;
+`else
     force dut.field_storage.r1.f1.value = 16'd1;
     release dut.field_storage.r1.f1.value;
+`endif
     @cb;
     @cb;
     assert(cb.parity_error == 1'b1);