diff --git a/.github/workflows/testnet_docker.yml b/.github/workflows/testnet_docker.yml
index 233d13312..7f6b32d46 100644
--- a/.github/workflows/testnet_docker.yml
+++ b/.github/workflows/testnet_docker.yml
@@ -62,5 +62,7 @@ jobs:
             LIDO_STARTING_RATE=35000000000000000 # 3.5% APR
             ERC4626_HYPERDRIVE_POSITION_DURATION=31536000 # 1 year in seconds
             ERC4626_HYPERDRIVE_CHECKPOINT_DURATION=86400 # 1 day in seconds
+            ERC4626_HYPERDRIVE_FLAT_FEE=50000000000000000 # 5% APR
             STETH_HYPERDRIVE_POSITION_DURATION=31536000 # 1 year in seconds
             STETH_HYPERDRIVE_CHECKPOINT_DURATION=86400 # 1 day in seconds
+            STETH_HYPERDRIVE_FLAT_FEE=50000000000000000 # 5% APR