diff --git a/src/ALE/Recon1d_type.F90 b/src/ALE/Recon1d_type.F90
index 9799b01bf3..7e4dc59bea 100644
--- a/src/ALE/Recon1d_type.F90
+++ b/src/ALE/Recon1d_type.F90
@@ -32,8 +32,15 @@ module Recon1d_type
   !> Deferred implementation of the derivative of the reconstruction at a point
   procedure(i_dfdx), deferred :: dfdx
   !> Deferred implementation of check_reconstruction
+  !!
+  !! Returns True if a check fails. Returns False if all checks pass.
+  !! Checks are about internal of inferred state, for arbitrary inputs.
+  !! Checks should cover all the expected properties of a reconstruction.
   procedure(i_check_reconstruction), deferred :: check_reconstruction
   !> Deferred implementation of unit tests for the reconstruction
+  !!
+  !! Returns True if a test fails. Returns False if all tests pass.
+  !! Tests in unit_tests() are usually checks against known (e.g. analytic) solutions.
   procedure(i_unit_tests), deferred :: unit_tests
   !> Deferred implementation of deallocation
   procedure(i_destroy), deferred :: destroy