diff --git a/test/sumfact/hyperbolic/lineartransport.mini b/test/sumfact/hyperbolic/lineartransport.mini
index 26bc9233c56afb75c4fb438ff36f5a9a7b0e3eca..f4d694b2186ad9a3c764c04fcaf898ac566d55af 100644
--- a/test/sumfact/hyperbolic/lineartransport.mini
+++ b/test/sumfact/hyperbolic/lineartransport.mini
@@ -1,12 +1,12 @@
 __name = sumfact_lineartransport
 
 extension = 1.0 1.0
-cells = 20 20
+cells = 10 10
 elementType = hexahedral
 
 [instat]
 T = 1.5
-dt = 0.01
+dt = 0.0025
 
 [wrapper.vtkcompare]
 name = {__name}
@@ -17,5 +17,6 @@ sumfact = 1
 #fastdg = 1
 # This tests that all mass is transported out of the domain.
 # While this is not the best of tests, it is something easily checked for.
+numerical_jacobian = 1
 explicit_time_stepping = 1
 compare_l2errorsquared = 1e-10