diff --git a/Overlap/Tests/test_read_snapshot.f90 b/Overlap/Tests/test_read_snapshot.f90
index ff036c956e53218ad07f36c51d9642f9cfd7932e..ee95b8bee89729e680edfc7bc5adbb3a6663dcb7 100644
--- a/Overlap/Tests/test_read_snapshot.f90
+++ b/Overlap/Tests/test_read_snapshot.f90
@@ -63,7 +63,7 @@ program test_read_snapshot
   close(unit)
 
   ! main_nml:
-  k = ssm(1)%d0
+  k = ssm(1)%d0 ! default value
   write(unit = error_unit, nml = main_nml)
   write(unit = error_unit, fmt = *) "Enter namelist main_nml."
   read(unit = *, nml = main_nml)