diff --git a/test_regress/t/t_threads_nondeterminism.pl b/test_regress/t/t_threads_nondeterminism.pl
index c37d9bd1f..19e7f0b6f 100755
--- a/test_regress/t/t_threads_nondeterminism.pl
+++ b/test_regress/t/t_threads_nondeterminism.pl
@@ -12,7 +12,7 @@ scenarios(vltmt => 1);
 top_filename("t/t_threads_counter.v");
 
 compile(
-    verilator_flags2 => ['--cc --threads 2 --debug-nondeterminism'],
+    verilator_flags2 => ['--cc --threads 2 --debug-nondeterminism --no-skip-identical'],
     );
 
 execute(