diff --git a/lbmpy_tests/test_srt_trt_simplifications.py b/lbmpy_tests/test_srt_trt_simplifications.py
index 8918ee83737dcfd444647428d59de04285fa3b61..a1f57a08716d49a14f8408d8420e406cce79521c 100644
--- a/lbmpy_tests/test_srt_trt_simplifications.py
+++ b/lbmpy_tests/test_srt_trt_simplifications.py
@@ -41,7 +41,7 @@ def test_simplifications_srt_d2q9_incompressible_regular():
 def test_simplifications_srt_d2q9_incompressible_zc():
     omega = sp.symbols('omega')
     method = create_srt(LBStencil(Stencil.D2Q9), omega, compressible=False,
-                        zero_centered=True, equilibrium_order=2)
+                        zero_centered=True, delta_equilibrium=True, equilibrium_order=2)
     check_method(method, [53, 46, 0], [53, 38, 0])
 
 
@@ -55,7 +55,7 @@ def test_simplifications_srt_d2q9_compressible_regular():
 def test_simplifications_srt_d2q9_compressible_zc():
     omega = sp.symbols('omega')
     method = create_srt(LBStencil(Stencil.D2Q9), omega, compressible=True,
-                        equilibrium_order=2)
+                        zero_centered=True, delta_equilibrium=True, equilibrium_order=2)
     check_method(method, [54, 58, 1], [54, 42, 1])