diff --git a/db/src/lib.rs b/db/src/lib.rs
index ef47275d..9c9ac6fa 100644
--- a/db/src/lib.rs
+++ b/db/src/lib.rs
@@ -55,11 +55,11 @@ mod tx_checking;
 pub mod types;
 mod upsert_resolution;
 
-// Export these for reference from tests. cfg(test) should work, but doesn't.
-// #[cfg(test)]
+// Export these for reference from sync code and tests.
 pub use bootstrap::{
     TX0,
     USER0,
+    V1_PARTS,
 };
 
 pub static TIMELINE_MAIN: i64 = 0;
@@ -108,6 +108,7 @@ pub use tx_observer::{
 pub use types::{
     AttributeSet,
     DB,
+    Partition,
     PartitionMap,
     TransactableValue,
 };
diff --git a/db/src/types.rs b/db/src/types.rs
index 0e2ed3bd..92ee04cb 100644
--- a/db/src/types.rs
+++ b/db/src/types.rs
@@ -95,6 +95,7 @@ impl Partition {
 
 /// Map partition names to `Partition` instances.
 #[derive(Clone, Debug, Default, Eq, Hash, Ord, PartialOrd, PartialEq)]
+#[cfg_attr(feature = "syncable", derive(Serialize,Deserialize))]
 pub struct PartitionMap(BTreeMap<String, Partition>);
 
 impl Deref for PartitionMap {
diff --git a/tolstoy/Cargo.toml b/tolstoy/Cargo.toml
index a0025e27..12e9e9db 100644
--- a/tolstoy/Cargo.toml
+++ b/tolstoy/Cargo.toml
@@ -31,6 +31,7 @@ path = "../core-traits"
 
 [dependencies.mentat_db]
 path = "../db"
+features = ["syncable"]
 
 [dependencies.db_traits]
 path = "../db-traits"