diff --git a/ProcessLib/HeatConduction/Tests.cmake b/ProcessLib/HeatConduction/Tests.cmake
index b21cd0f97fcb754d4aebec1ff509ba40b24e84e6..75ad3210ac64c20850654706192559caf6edaa88 100644
--- a/ProcessLib/HeatConduction/Tests.cmake
+++ b/ProcessLib/HeatConduction/Tests.cmake
@@ -17,6 +17,9 @@ AddTest(
         EXECUTABLE_ARGS picard.prj
         TESTER vtkdiff
         DIFF_DATA
+        picard_ts_65_t_5078125.000000.vtu picard_ts_65_t_5078125.000000.vtu temperature temperature 1e-12 1e-16
+        picard_ts_405_t_31640625.000000.vtu picard_ts_405_t_31640625.000000.vtu temperature temperature 1e-12 1e-16
+        picard_ts_500_t_39062500.000000.vtu picard_ts_500_t_39062500.000000.vtu temperature temperature 1e-12 1e-16
         temperature_analytical.vtu picard_ts_65_t_5078125.000000.vtu Temperature_Analytical_2months temperature 1e-4 1e-4
         temperature_analytical.vtu picard_ts_405_t_31640625.000000.vtu Temperature_Analytical_1year temperature 1e-4 1e-4
     REQUIREMENTS NOT OGS_USE_MPI