diff --git a/src/bin_dal_node/profile_manager.ml b/src/bin_dal_node/profile_manager.ml
index e60d6530592ed20b4e2d2ed983ce7449337a7e39..c02fda1be493043b79afc7a81584740dffaee054 100644
--- a/src/bin_dal_node/profile_manager.ml
+++ b/src/bin_dal_node/profile_manager.ml
@@ -213,17 +213,23 @@ let get_attested_data_default_store_period t proto_parameters =
   let refutation_game_period =
     2 * get_refutation_game_period proto_parameters
   in
-  let attestation_period = 2 * proto_parameters.attestation_lag in
+  (* TODO: https://gitlab.com/tezos/tezos/-/issues/7772
+     This period should be zero. *)
+  let bootstrap_node_period = 2 * proto_parameters.attestation_lag in
+  (* For observability purpose, we aim for a non-slot producer profile
+     to keep shards for about 10 minutes.
+     150 blocks is 10 minutes on Ghostnet, 20 minutes on Mainnet. *)
+  let default_period = 150 in
   let supports_refutations_bis, period =
     match get_profiles t with
-    | Random_observer -> (false, attestation_period)
+    | Random_observer -> (false, default_period)
     | Operator op ->
         let has_producer = Operator_profile.(has_producer op) in
         let period =
-          if has_producer then refutation_game_period else attestation_period
+          if has_producer then refutation_game_period else default_period
         in
         (has_producer, period)
-    | Bootstrap -> (false, attestation_period)
+    | Bootstrap -> (false, bootstrap_node_period)
   in
   (* This is just to keep this function synced with {!supports_refutations}. *)
   assert (supports_refutations_bis = supports_refutations t) ;
diff --git a/tezt/lib_tezos/dal_common.ml b/tezt/lib_tezos/dal_common.ml
index e74d777e077e6bdabc76ea6d08aab0aafc0d2323..65697d48b31cd68061d0be2c759b6088ee028234 100644
--- a/tezt/lib_tezos/dal_common.ml
+++ b/tezt/lib_tezos/dal_common.ml
@@ -122,25 +122,19 @@ module Parameters = struct
     let blocks_per_cycle =
       JSON.(proto_parameters |-> "blocks_per_cycle" |> as_int)
     in
-    let attestation_lag =
-      JSON.(
-        proto_parameters |-> "dal_parametric" |-> "attestation_lag" |> as_int)
-    in
-    let blocks = (3 * attestation_lag) + 1 in
-    if blocks mod blocks_per_cycle = 0 then blocks / blocks_per_cycle
-    else 1 + (blocks / blocks_per_cycle)
+    let default_block_storage = 150 in
+    if default_block_storage mod blocks_per_cycle = 0 then
+      default_block_storage / blocks_per_cycle
+    else 1 + (default_block_storage / blocks_per_cycle)
 
   let storage_period_without_refutation_in_cycles ~proto_parameters =
     let blocks_per_cycle =
       JSON.(proto_parameters |-> "blocks_per_cycle" |> as_int)
     in
-    let attestation_lag =
-      JSON.(
-        proto_parameters |-> "dal_parametric" |-> "attestation_lag" |> as_int)
-    in
-    let blocks = 2 * attestation_lag in
-    if blocks mod blocks_per_cycle = 0 then blocks / blocks_per_cycle
-    else 1 + (blocks / blocks_per_cycle)
+    let default_block_storage = 150 in
+    if default_block_storage mod blocks_per_cycle = 0 then
+      default_block_storage / blocks_per_cycle
+    else 1 + (default_block_storage / blocks_per_cycle)
 end
 
 module Committee = struct
diff --git a/tezt/tests/dal.ml b/tezt/tests/dal.ml
index ce5b49a6e4c974bc0bae9f39d3118937ae8fc4ec..11f8682789690eb2f95e7c0f01dbd6fb1ddef254 100644
--- a/tezt/tests/dal.ml
+++ b/tezt/tests/dal.ml
@@ -6358,7 +6358,7 @@ module Garbage_collection = struct
         let* () = Lwt.join wait_block_p in
         bake_loop (n - 1)
     in
-    let* () = bake_loop 25 in
+    let* () = bake_loop 180 in
     Log.info "Blocks baked !" ;
 
     Log.info "Checking that the slot was attested" ;
@@ -6620,7 +6620,7 @@ module Garbage_collection = struct
         let* () = Lwt.join wait_block_p in
         bake_loop (n - 1)
     in
-    let* () = bake_loop 25 in
+    let* () = bake_loop 180 in
     Log.info "Blocks baked !" ;
 
     Log.info "Checking that the slot was attested" ;