diff --git a/tests/regression_tests/source_mcpl_file/results_true.dat b/tests/regression_tests/source_mcpl_file/results_true.dat
new file mode 100644
index 0000000000..f2209006a1
--- /dev/null
+++ b/tests/regression_tests/source_mcpl_file/results_true.dat
@@ -0,0 +1,2 @@
+k-combined:
+3.017557E-01 3.398770E-03