diff --git a/src/agent0/ethpy/hyperdrive/interface/read_interface.py b/src/agent0/ethpy/hyperdrive/interface/read_interface.py
index 3633b1ed18..00008ec40c 100644
--- a/src/agent0/ethpy/hyperdrive/interface/read_interface.py
+++ b/src/agent0/ethpy/hyperdrive/interface/read_interface.py
@@ -384,24 +384,23 @@ def get_vault_shares(self, block_number: BlockNumber | None) -> FixedPoint:
             block_number = self.get_block_number(self.get_current_block())
         return _get_vault_shares(self.vault_shares_token_contract, self.hyperdrive_contract, block_number)
 
-    def get_idle_shares(self, block_number: BlockNumber | None) -> FixedPoint:
+    def get_idle_shares(self, pool_state: PoolState | None) -> FixedPoint:
         """Get the balance of idle shares that the Hyperdrive pool has.
 
         Arguments
         ---------
-        block_number: BlockNumber, optional
-            The number for any minted block.
-            Defaults to the current block number.
+        pool_state: PoolState, optional
+            The state of the pool, which includes block details, pool config, and pool info.
+            If not given, use the current pool state.
 
         Returns
         -------
         FixedPoint
             The quantity of vault shares for the yield source at the provided block.
         """
-        if block_number is None:
-            block_number = self.get_block_number(self.get_current_block())
-        pool_state = self.current_pool_state
-        long_exposure_shares = self.current_pool_state.pool_info.long_exposure / pool_state.pool_info.vault_share_price
+        if pool_state is None:
+            pool_state = self.current_pool_state
+        long_exposure_shares = pool_state.pool_info.long_exposure / pool_state.pool_info.vault_share_price
         idle_shares = (
             pool_state.pool_info.share_reserves - long_exposure_shares - pool_state.pool_config.minimum_share_reserves
         )
diff --git a/src/agent0/hyperfuzz/system_fuzz/invariant_checks.py b/src/agent0/hyperfuzz/system_fuzz/invariant_checks.py
index ba11537527..9e0b5ceecf 100644
--- a/src/agent0/hyperfuzz/system_fuzz/invariant_checks.py
+++ b/src/agent0/hyperfuzz/system_fuzz/invariant_checks.py
@@ -282,8 +282,7 @@ def _check_present_value_greater_than_idle_shares(
     exception_data: dict[str, Any] = {}
 
     present_value = interface.calc_present_value(pool_state)
-    block_number = pool_state.block_number
-    idle_shares = interface.get_idle_shares(block_number)
+    idle_shares = interface.get_idle_shares(pool_state)
 
     if not present_value >= idle_shares:
         difference_in_wei = abs(present_value.scaled_value - idle_shares.scaled_value)
diff --git a/src/agent0/hyperfuzz/unit_fuzz/fuzz_present_value.py b/src/agent0/hyperfuzz/unit_fuzz/fuzz_present_value.py
index 73abac2af6..a23c5a8e0e 100644
--- a/src/agent0/hyperfuzz/unit_fuzz/fuzz_present_value.py
+++ b/src/agent0/hyperfuzz/unit_fuzz/fuzz_present_value.py
@@ -306,7 +306,7 @@ def invariant_check(
     # idle shares are the shares that are not reserved by open positions
     # TODO: Add calculate_idle_share_reserves to hyperdrivepy and use that here.
     current_present_value = interactive_hyperdrive.interface.calc_present_value(pool_state)
-    idle_shares = interactive_hyperdrive.interface.get_idle_shares(pool_state.block_number)
+    idle_shares = interactive_hyperdrive.interface.get_idle_shares(pool_state)
     if current_present_value < idle_shares:
         difference_in_wei = abs(current_present_value.scaled_value - idle_shares.scaled_value)
         exception_message.append("The present value is not greater than or equal to the idle.")