diff --git a/ProcessLib/PhaseField/Tests.cmake b/ProcessLib/PhaseField/Tests.cmake
index 2f3c89b1968ce22dd3b3f45ec13979649c16951c..21095de24dabd1c21bd4b424a191051d978427c6 100644
--- a/ProcessLib/PhaseField/Tests.cmake
+++ b/ProcessLib/PhaseField/Tests.cmake
@@ -101,6 +101,6 @@ AddTest(
     REQUIREMENTS OGS_USE_MPI AND OGS_USE_PYTHON
     RUNTIME 18
     DIFF_DATA
-        expected_surfing_ts_20_t_1_000000_0.vtu surfing_ts_20_t_1_000000_0.vtu displacement displacement 1e-5 0
-        expected_surfing_ts_20_t_1_000000_0.vtu surfing_ts_20_t_1_000000_0.vtu phasefield phasefield 1e-6 0
+        expected_surfing_ts_20_t_1_000000_0.vtu surfing_ts_20_t_1.000000.vtu displacement displacement 1e-5 0
+        expected_surfing_ts_20_t_1_000000_0.vtu surfing_ts_20_t_1.000000.vtu phasefield phasefield 1e-6 0
 )