diff --git a/test/test_flux_derivatives.py b/test/test_flux_derivatives.py
index 4fb26d42deea0311a0cc89d5315149c97ff47d67..aaa0e43471a62a771cd6a908f8c20324e3e01ac1 100644
--- a/test/test_flux_derivatives.py
+++ b/test/test_flux_derivatives.py
@@ -24,7 +24,7 @@ def test_compute_flux_derivatives(ctx_factory):
     queue = u.get_queue(ctx_factory)
     prg = prg.copy(target=lp.PyOpenCLTarget(queue.device))
 
-    lp.auto_test_vs_ref(prg, ctx_factory(), warmup_rounds=1,
+    lp.auto_test_vs_ref(prg, ctx_factory(), warmup_rounds=0,
             parameters=dict(ndim=3, nvars=5, nx=16, ny=16, nz=16))
 
 
@@ -40,7 +40,7 @@ def test_compute_flux_derivatives_gpu(ctx_factory, write_code=False):
     if write_code:
         u.write_target_device_code(prg)
 
-    lp.auto_test_vs_ref(prg, ctx_factory(), warmup_rounds=1,
+    lp.auto_test_vs_ref(prg, ctx_factory(), warmup_rounds=0,
             parameters=dict(ndim=3, nvars=5, nx=16, ny=16, nz=16))