diff --git a/.github/actions/get_exclude_dirs/action.yml b/.github/actions/get_exclude_dirs/action.yml
index eeb6a00f1a..52cfc27fc2 100644
--- a/.github/actions/get_exclude_dirs/action.yml
+++ b/.github/actions/get_exclude_dirs/action.yml
@@ -28,12 +28,10 @@ runs:
               UNSTABLE_EXCLUSIONS="${{ format('
               examples/experimental/demo/bitcoin_psbt
               examples/stable/test/end_to_end/candid_rpc/multi_deploy
-              examples/stable/test/property/candid_rpc/stable_b_tree_map
               examples/stable/test/property/ic_api/performance_counter
               examples/experimental/test/end_to_end/http_server/http_outcall_fetch
               examples/experimental/test/end_to_end/http_server/ic_evm_rpc
               examples/experimental/test/end_to_end/http_server/multi_deploy
-              examples/experimental/test/property/candid_rpc/stable_b_tree_map
               ') }}"
 
               SLOW_EXCLUSIONS="${{ format('
@@ -41,6 +39,7 @@ runs:
               examples/experimental/demo/ckbtc
               examples/stable/test/end_to_end/candid_rpc/bitcoin
               examples/stable/test/end_to_end/candid_rpc/stable_structures
+              examples/stable/test/property/candid_rpc/stable_b_tree_map
               examples/experimental/test/end_to_end/candid_rpc/bitcoin
               examples/experimental/test/end_to_end/candid_rpc/composite_queries
               examples/experimental/test/end_to_end/candid_rpc/ckbtc
@@ -50,6 +49,7 @@ runs:
               examples/experimental/test/end_to_end/http_server/autoreload
               examples/experimental/test/end_to_end/http_server/large_files
               examples/experimental/test/end_to_end/http_server/open_value_sharing
+              examples/experimental/test/property/candid_rpc/stable_b_tree_map
               ') }}"
 
               EXCLUDE_DIRS=""
diff --git a/test/property/arbitraries/stable_b_tree_map_arb.ts b/test/property/arbitraries/stable_b_tree_map_arb.ts
index fe422ad53c..6bbaa79276 100644
--- a/test/property/arbitraries/stable_b_tree_map_arb.ts
+++ b/test/property/arbitraries/stable_b_tree_map_arb.ts
@@ -31,7 +31,7 @@ export function StableBTreeMapArb(
             UniqueIdentifierArb('globalNames'),
             createUniquePrimitiveArb(
                 fc.nat({
-                    max: 254
+                    max: 253
                 })
             )
         )