diff --git a/web/packages/test/scripts/build-binary.sh b/web/packages/test/scripts/build-binary.sh
index eefebdde7f..c918232c0d 100755
--- a/web/packages/test/scripts/build-binary.sh
+++ b/web/packages/test/scripts/build-binary.sh
@@ -58,27 +58,26 @@ build_relayer() {
     cp $relay_bin "$output_bin_dir"
 }
 
-hack_beacon_client() {
+set_slot_time() {
+    local new_value=$1
     echo "Hack lodestar for faster slot time"
-    local preset_minimal_config_file="$root_dir/lodestar/packages/config/src/chainConfig/presets/mainnet.ts"
+    local preset_mainnet_config_file="$root_dir/lodestar/packages/config/src/chainConfig/presets/mainnet.ts"
     if [[ "$(uname)" == "Darwin" && -z "${IN_NIX_SHELL:-}" ]]; then
-        gsed -i "s/SECONDS_PER_SLOT: 6/SECONDS_PER_SLOT: 1/g" $preset_minimal_config_file
+        gsed -i "s/SECONDS_PER_SLOT: .*/SECONDS_PER_SLOT: $new_value,/g" $preset_mainnet_config_file
     else
-        sed -i "s/SECONDS_PER_SLOT: 6/SECONDS_PER_SLOT: 1/g" $preset_minimal_config_file
+        sed -i "s/SECONDS_PER_SLOT: .*/SECONDS_PER_SLOT: $new_value,/g" $preset_mainnet_config_file
     fi
 }
 
 build_lodestar() {
-    if [ ! -d "$root_dir/lodestar/packages/cli/lib" ]; then
-        pushd $root_dir/lodestar
-        if [ "$eth_fast_mode" == "true" ]; then
-            hack_beacon_client
-        fi
-        yarn install && yarn run build
-        popd
+    pushd $root_dir/lodestar
+    if [ "$eth_fast_mode" == "true" ]; then
+        set_slot_time 1
     else
-        echo "lodestar has already been built."
+        set_slot_time 12
     fi
+    yarn install && yarn run build
+    popd
 }
 
 install_binary() {
diff --git a/web/packages/test/scripts/deploy-ethereum.sh b/web/packages/test/scripts/deploy-ethereum.sh
index 968a746cea..11352d8115 100755
--- a/web/packages/test/scripts/deploy-ethereum.sh
+++ b/web/packages/test/scripts/deploy-ethereum.sh
@@ -79,17 +79,6 @@ start_lodestar() {
     fi
 }
 
-set_slot_time() {
-    local new_value=$1
-    echo "Hack lodestar for faster slot time"
-    local preset_mainnet_config_file="$root_dir/lodestar/packages/config/src/chainConfig/presets/mainnet.ts"
-    if [[ "$(uname)" == "Darwin" && -z "${IN_NIX_SHELL:-}" ]]; then
-        gsed -i "s/SECONDS_PER_SLOT: .*/SECONDS_PER_SLOT: $new_value,/g" $preset_mainnet_config_file
-    else
-        sed -i "s/SECONDS_PER_SLOT: .*/SECONDS_PER_SLOT: $new_value,/g" $preset_mainnet_config_file
-    fi
-}
-
 deploy_local() {
     # 1. deploy execution client
     echo "Starting execution node"
@@ -98,14 +87,6 @@ deploy_local() {
     echo "Waiting for geth API to be ready"
     sleep 3
 
-    # if were are running locally speed up the seconds per slot from 12 seconds to 2 seconds. if we are not
-    # running locally, revert
-    if [ "$eth_network" == "localhost" ]; then
-        set_slot_time 1
-    else
-        set_slot_time 12
-    fi
-
     # 2. deploy consensus client
     echo "Starting beacon node"
     start_lodestar
diff --git a/web/packages/test/scripts/set-env.sh b/web/packages/test/scripts/set-env.sh
index 8865cfb2ca..4c46a01069 100755
--- a/web/packages/test/scripts/set-env.sh
+++ b/web/packages/test/scripts/set-env.sh
@@ -18,7 +18,7 @@ eth_endpoint_http="${ETH_RPC_ENDPOINT:-http://127.0.0.1:8545}/${INFURA_PROJECT_I
 eth_endpoint_ws="${ETH_WS_ENDPOINT:-ws://127.0.0.1:8546}/${INFURA_PROJECT_ID:-}"
 eth_gas_limit="${ETH_GAS_LIMIT:-5000000}"
 eth_chain_id="${ETH_NETWORK_ID:-15}"
-eth_fast_mode="${ETH_FAST_MODE:-false}"
+eth_fast_mode="${ETH_FAST_MODE:-true}"
 etherscan_api_key="${ETHERSCAN_API_KEY:-}"
 
 parachain_relay_eth_key="${PARACHAIN_RELAY_ETH_KEY:-0x8013383de6e5a891e7754ae1ef5a21e7661f1fe67cd47ca8ebf4acd6de66879a}"