diff --git a/zebra-node-services/Cargo.toml b/zebra-node-services/Cargo.toml
index 9042d3e5cfc..cc0a33033f0 100644
--- a/zebra-node-services/Cargo.toml
+++ b/zebra-node-services/Cargo.toml
@@ -27,7 +27,6 @@ getblocktemplate-rpcs = [
 # Tool and test features
 
 rpc-client = [
-    "base64",
     "color-eyre",
     "jsonrpc-core",
     "reqwest",
@@ -43,7 +42,6 @@ zebra-chain = { path = "../zebra-chain" , version = "1.0.0-beta.39" }
 # Optional dependencies
 
 # Tool and test feature rpc-client
-base64 = { version  = "0.22.1", optional = true }
 color-eyre = { version = "0.6.3", optional = true }
 jsonrpc-core = { version = "18.0.0", optional = true }
 # Security: avoid default dependency on openssl
diff --git a/zebra-node-services/src/rpc_client.rs b/zebra-node-services/src/rpc_client.rs
index 61c14b72c96..7f5ffbf192e 100644
--- a/zebra-node-services/src/rpc_client.rs
+++ b/zebra-node-services/src/rpc_client.rs
@@ -4,7 +4,6 @@
 
 use std::net::SocketAddr;
 
-use base64::{engine::general_purpose::URL_SAFE, Engine as _};
 use reqwest::Client;
 
 use crate::BoxError;
@@ -14,16 +13,14 @@ use crate::BoxError;
 pub struct RpcRequestClient {
     client: Client,
     rpc_address: SocketAddr,
-    auth_cookie: String,
 }
 
 impl RpcRequestClient {
     /// Creates new RPCRequestSender
-    pub fn new(rpc_address: SocketAddr, auth_cookie: String) -> Self {
+    pub fn new(rpc_address: SocketAddr) -> Self {
         Self {
             client: Client::new(),
             rpc_address,
-            auth_cookie,
         }
     }
 
@@ -42,13 +39,6 @@ impl RpcRequestClient {
                 r#"{{"jsonrpc": "2.0", "method": "{method}", "params": {params}, "id":123 }}"#
             ))
             .header("Content-Type", "application/json")
-            .header(
-                "Authorization",
-                format!(
-                    "Basic {}",
-                    URL_SAFE.encode(format!("__cookie__:{}", &self.auth_cookie))
-                ),
-            )
             .send()
             .await
     }
diff --git a/zebra-rpc/src/config.rs b/zebra-rpc/src/config.rs
index ee26f679de3..cd851211529 100644
--- a/zebra-rpc/src/config.rs
+++ b/zebra-rpc/src/config.rs
@@ -76,6 +76,9 @@ pub struct Config {
 
     /// The directory where Zebra stores RPC cookies.
     pub cookie_dir: PathBuf,
+
+    /// Enable cookie-based authentication for RPCs.
+    pub enable_cookie_auth: bool,
 }
 
 // This impl isn't derivable because it depends on features.
@@ -100,8 +103,11 @@ impl Default for Config {
             // Debug options are always off by default.
             debug_force_finished_sync: false,
 
-            //
+            // Use the default cache dir for cookies.
             cookie_dir: default_cache_dir(),
+
+            // Enable cookie-based authentication by default.
+            enable_cookie_auth: true,
         }
     }
 }
diff --git a/zebra-rpc/src/server/http_request_compatibility.rs b/zebra-rpc/src/server/http_request_compatibility.rs
index ac09e72e443..f2780938393 100644
--- a/zebra-rpc/src/server/http_request_compatibility.rs
+++ b/zebra-rpc/src/server/http_request_compatibility.rs
@@ -176,6 +176,9 @@ impl FixHttpRequestMiddleware {
 
     /// Check if the request is authenticated.
     pub fn check_credentials(&self, headers: &header::HeaderMap) -> bool {
+        if !self.0.enable_cookie_auth {
+            return true;
+        }
         headers
             .get(header::AUTHORIZATION)
             .and_then(|auth_header| auth_header.to_str().ok())
diff --git a/zebra-rpc/src/server/tests/vectors.rs b/zebra-rpc/src/server/tests/vectors.rs
index ae670108f8d..8ffc3386a0d 100644
--- a/zebra-rpc/src/server/tests/vectors.rs
+++ b/zebra-rpc/src/server/tests/vectors.rs
@@ -47,6 +47,7 @@ fn rpc_server_spawn(parallel_cpu_threads: bool) {
         parallel_cpu_threads: if parallel_cpu_threads { 2 } else { 1 },
         debug_force_finished_sync: false,
         cookie_dir: Default::default(),
+        enable_cookie_auth: false,
     };
 
     let rt = tokio::runtime::Runtime::new().unwrap();
@@ -136,6 +137,7 @@ fn rpc_server_spawn_unallocated_port(parallel_cpu_threads: bool, do_shutdown: bo
         parallel_cpu_threads: if parallel_cpu_threads { 0 } else { 1 },
         debug_force_finished_sync: false,
         cookie_dir: Default::default(),
+        enable_cookie_auth: false,
     };
 
     let rt = tokio::runtime::Runtime::new().unwrap();
@@ -218,6 +220,7 @@ fn rpc_server_spawn_port_conflict() {
         parallel_cpu_threads: 1,
         debug_force_finished_sync: false,
         cookie_dir: Default::default(),
+        enable_cookie_auth: false,
     };
 
     let rt = tokio::runtime::Runtime::new().unwrap();
@@ -330,6 +333,7 @@ fn rpc_server_spawn_port_conflict_parallel_auto() {
         parallel_cpu_threads: 2,
         debug_force_finished_sync: false,
         cookie_dir: Default::default(),
+        enable_cookie_auth: false,
     };
 
     let rt = tokio::runtime::Runtime::new().unwrap();
diff --git a/zebra-rpc/src/sync.rs b/zebra-rpc/src/sync.rs
index 0e3349b15bc..475177cc1d4 100644
--- a/zebra-rpc/src/sync.rs
+++ b/zebra-rpc/src/sync.rs
@@ -57,10 +57,8 @@ impl TrustedChainSync {
         rpc_address: SocketAddr,
         db: ZebraDb,
         non_finalized_state_sender: tokio::sync::watch::Sender<NonFinalizedState>,
-        cookie_dir: std::path::PathBuf,
     ) -> (LatestChainTip, ChainTipChange, JoinHandle<()>) {
-        let auth_cookie = crate::server::cookie::get(cookie_dir).expect("cookie should exist");
-        let rpc_client = RpcRequestClient::new(rpc_address, auth_cookie);
+        let rpc_client = RpcRequestClient::new(rpc_address);
         let non_finalized_state = NonFinalizedState::new(&db.network());
         let (chain_tip_sender, latest_chain_tip, chain_tip_change) =
             ChainTipSender::new(None, &db.network());
@@ -318,7 +316,6 @@ impl TrustedChainSync {
 /// a [`JoinHandle`] for the sync task.
 pub fn init_read_state_with_syncer(
     state_config: zebra_state::Config,
-    rpc_config: crate::config::Config,
     network: &Network,
     rpc_address: SocketAddr,
 ) -> tokio::task::JoinHandle<
@@ -340,13 +337,8 @@ pub fn init_read_state_with_syncer(
 
         let (read_state, db, non_finalized_state_sender) =
             spawn_init_read_only(state_config, &network).await?;
-        let (latest_chain_tip, chain_tip_change, sync_task) = TrustedChainSync::spawn(
-            rpc_address,
-            db,
-            non_finalized_state_sender,
-            rpc_config.cookie_dir,
-        )
-        .await;
+        let (latest_chain_tip, chain_tip_change, sync_task) =
+            TrustedChainSync::spawn(rpc_address, db, non_finalized_state_sender).await;
         Ok((read_state, latest_chain_tip, chain_tip_change, sync_task))
     })
 }
diff --git a/zebra-scan/src/bin/scanner/main.rs b/zebra-scan/src/bin/scanner/main.rs
index 092f0d2c1c5..e7ec853125f 100644
--- a/zebra-scan/src/bin/scanner/main.rs
+++ b/zebra-scan/src/bin/scanner/main.rs
@@ -7,7 +7,6 @@ use structopt::StructOpt;
 use tracing::*;
 
 use zebra_chain::{block::Height, parameters::Network};
-use zebra_rpc::config::Config as RpcConfig;
 use zebra_state::SaplingScanningKey;
 
 use core::net::SocketAddr;
@@ -75,13 +74,10 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
         db_config,
     };
 
-    let rpc_config = RpcConfig::default();
-
     // Get a read-only state and the database.
     let (read_state, _latest_chain_tip, chain_tip_change, sync_task) =
         zebra_rpc::sync::init_read_state_with_syncer(
             state_config,
-            rpc_config,
             &network,
             args.zebra_rpc_listen_addr,
         )
diff --git a/zebra-utils/src/bin/zebra-checkpoints/main.rs b/zebra-utils/src/bin/zebra-checkpoints/main.rs
index a2cffdf9b74..cff158b5ca2 100644
--- a/zebra-utils/src/bin/zebra-checkpoints/main.rs
+++ b/zebra-utils/src/bin/zebra-checkpoints/main.rs
@@ -30,7 +30,6 @@ use zebra_node_services::{
     constants::{MAX_CHECKPOINT_BYTE_COUNT, MAX_CHECKPOINT_HEIGHT_GAP},
     rpc_client::RpcRequestClient,
 };
-use zebra_rpc::{config::Config as RpcConfig, server::cookie};
 use zebra_utils::init_tracing;
 
 pub mod args;
@@ -61,8 +60,7 @@ where
     let addr = our_args
         .addr
         .unwrap_or_else(|| "127.0.0.1:8232".parse().expect("valid address"));
-    let auth_cookie = cookie::get(RpcConfig::default().cookie_dir).expect("cookie should exist");
-    let client = RpcRequestClient::new(addr, auth_cookie);
+    let client = RpcRequestClient::new(addr);
 
     // Launch a request with the RPC method and arguments
     //
diff --git a/zebrad/tests/acceptance.rs b/zebrad/tests/acceptance.rs
index b98996c95c4..002c12eb3e4 100644
--- a/zebrad/tests/acceptance.rs
+++ b/zebrad/tests/acceptance.rs
@@ -165,10 +165,7 @@ use zebra_chain::{
 use zebra_consensus::ParameterCheckpoint;
 use zebra_node_services::rpc_client::RpcRequestClient;
 
-use zebra_rpc::{
-    config::Config as RpcConfig,
-    server::{cookie, OPENED_RPC_ENDPOINT_MSG},
-};
+use zebra_rpc::server::OPENED_RPC_ENDPOINT_MSG;
 
 use zebra_state::{constants::LOCK_FILE_ERROR, state_database_format_version_in_code};
 
@@ -1596,11 +1593,8 @@ async fn rpc_endpoint(parallel_cpu_threads: bool) -> Result<()> {
 
     // Wait until port is open.
     let rpc_address = read_listen_addr_from_logs(&mut child, OPENED_RPC_ENDPOINT_MSG)?;
-    // Get the auth cookie
-    let auth_cookie =
-        zebra_rpc::server::cookie::get(config.rpc.cookie_dir).expect("cookie should exist");
     // Create an http client
-    let client = RpcRequestClient::new(rpc_address, auth_cookie);
+    let client = RpcRequestClient::new(rpc_address);
 
     // Make the call to the `getinfo` RPC method
     let res = client.call("getinfo", "[]".to_string()).await?;
@@ -1656,12 +1650,8 @@ async fn rpc_endpoint_client_content_type() -> Result<()> {
     // Wait until port is open.
     let rpc_address = read_listen_addr_from_logs(&mut child, OPENED_RPC_ENDPOINT_MSG)?;
 
-    // Get the auth cookie
-    let auth_cookie =
-        zebra_rpc::server::cookie::get(config.rpc.cookie_dir).expect("cookie should exist");
-
     // Create an http client
-    let client = RpcRequestClient::new(rpc_address, auth_cookie);
+    let client = RpcRequestClient::new(rpc_address);
 
     // Call to `getinfo` RPC method with a no content type.
     let res = client
@@ -1746,12 +1736,8 @@ fn non_blocking_logger() -> Result<()> {
         // Wait until port is open.
         let rpc_address = read_listen_addr_from_logs(&mut child, OPENED_RPC_ENDPOINT_MSG)?;
 
-        // Get the auth cookie
-        let auth_cookie =
-            zebra_rpc::server::cookie::get(config.rpc.cookie_dir).expect("cookie should exist");
-
         // Create an http client
-        let client = RpcRequestClient::new(rpc_address, auth_cookie);
+        let client = RpcRequestClient::new(rpc_address);
 
         // Most of Zebra's lines are 100-200 characters long, so 500 requests should print enough to fill the unix pipe,
         // fill the channel that tracing logs are queued onto, and drop logs rather than block execution.
@@ -2422,10 +2408,7 @@ async fn fully_synced_rpc_test() -> Result<()> {
 
     zebrad.expect_stdout_line_matches(format!("Opened RPC endpoint at {zebra_rpc_address}"))?;
 
-    // Get the auth cookie
-    let auth_cookie = cookie::get(RpcConfig::default().cookie_dir).expect("cookie should exist");
-
-    let client = RpcRequestClient::new(zebra_rpc_address, auth_cookie);
+    let client = RpcRequestClient::new(zebra_rpc_address);
 
     // Make a getblock test that works only on synced node (high block number).
     // The block is before the mandatory checkpoint, so the checkpoint cached state can be used
@@ -2865,14 +2848,9 @@ async fn fully_synced_rpc_z_getsubtreesbyindex_snapshot_test() -> Result<()> {
     // Wait for zebrad to load the full cached blockchain.
     zebrad.expect_stdout_line_matches(SYNC_FINISHED_REGEX)?;
 
-    // Get the auth cookie
-    let auth_cookie = cookie::get(RpcConfig::default().cookie_dir).expect("cookie should exist");
-
     // Create an http client
-    let client = RpcRequestClient::new(
-        zebra_rpc_address.expect("already checked that address is valid"),
-        auth_cookie,
-    );
+    let client =
+        RpcRequestClient::new(zebra_rpc_address.expect("already checked that address is valid"));
 
     // Create test vector matrix
     let zcashd_test_vectors = vec![
@@ -3024,7 +3002,6 @@ async fn trusted_chain_sync_handles_forks_correctly() -> Result<()> {
     let (read_state, _latest_chain_tip, mut chain_tip_change, _sync_task) =
         zebra_rpc::sync::init_read_state_with_syncer(
             config.state.clone(),
-            config.rpc,
             &config.network.network,
             rpc_address,
         )
@@ -3042,10 +3019,7 @@ async fn trusted_chain_sync_handles_forks_correctly() -> Result<()> {
 
     tracing::info!("got genesis chain tip change, submitting more blocks ..");
 
-    // Get the auth cookie
-    let auth_cookie = cookie::get(config.state.cache_dir).expect("cookie should exist");
-
-    let rpc_client = RpcRequestClient::new(rpc_address, auth_cookie);
+    let rpc_client = RpcRequestClient::new(rpc_address);
     let mut blocks = Vec::new();
     for _ in 0..10 {
         let (block, height) = rpc_client.submit_block_from_template().await?;
@@ -3239,7 +3213,6 @@ async fn trusted_chain_sync_handles_forks_correctly() -> Result<()> {
     let (_read_state, _latest_chain_tip, mut chain_tip_change, _sync_task) =
         zebra_rpc::sync::init_read_state_with_syncer(
             config.state,
-            config.rpc,
             &config.network.network,
             rpc_address,
         )
diff --git a/zebrad/tests/common/cached_state.rs b/zebrad/tests/common/cached_state.rs
index ac00e471b77..e7dca5075cb 100644
--- a/zebrad/tests/common/cached_state.rs
+++ b/zebrad/tests/common/cached_state.rs
@@ -23,7 +23,6 @@ use zebra_chain::{
 };
 use zebra_node_services::rpc_client::RpcRequestClient;
 
-use zebra_rpc::{config::Config as RpcConfig, server::cookie};
 use zebra_state::{ChainTipChange, LatestChainTip, MAX_BLOCK_REORG_HEIGHT};
 use zebra_test::command::TestChild;
 
@@ -230,11 +229,8 @@ pub async fn get_raw_future_blocks(
         true,
     )?;
 
-    // Get the auth cookie
-    let auth_cookie = cookie::get(RpcConfig::default().cookie_dir).expect("cookie should exist");
-
     // Create an http client
-    let rpc_client = RpcRequestClient::new(rpc_address, auth_cookie);
+    let rpc_client = RpcRequestClient::new(rpc_address);
 
     let blockchain_info: serde_json::Value = serde_json::from_str(
         &rpc_client
diff --git a/zebrad/tests/common/checkpoints.rs b/zebrad/tests/common/checkpoints.rs
index 2ac45e808c0..c1c0ae44716 100644
--- a/zebrad/tests/common/checkpoints.rs
+++ b/zebrad/tests/common/checkpoints.rs
@@ -20,7 +20,6 @@ use zebra_chain::{
 };
 use zebra_consensus::MAX_CHECKPOINT_HEIGHT_GAP;
 use zebra_node_services::rpc_client::RpcRequestClient;
-use zebra_rpc::{config::Config as RpcConfig, server::cookie};
 use zebra_state::state_database_format_version_in_code;
 use zebra_test::{
     args,
@@ -505,8 +504,7 @@ pub fn wait_for_zebra_checkpoints_generation<
 /// Returns an approximate `zebrad` tip height, using JSON-RPC.
 #[tracing::instrument]
 pub async fn zebrad_tip_height(zebra_rpc_address: SocketAddr) -> Result<Height> {
-    let auth_cookie = cookie::get(RpcConfig::default().cookie_dir).expect("cookie should exist");
-    let client = RpcRequestClient::new(zebra_rpc_address, auth_cookie);
+    let client = RpcRequestClient::new(zebra_rpc_address);
 
     let zebrad_blockchain_info = client
         .text_from_call("getblockchaininfo", "[]".to_string())
diff --git a/zebrad/tests/common/config.rs b/zebrad/tests/common/config.rs
index d6ee45f52ee..4b3f86201fd 100644
--- a/zebrad/tests/common/config.rs
+++ b/zebrad/tests/common/config.rs
@@ -166,6 +166,7 @@ pub fn rpc_port_config(
         // Default config, users who want to detect port conflicts configure this
         config.rpc.parallel_cpu_threads = 1;
     }
+    config.rpc.enable_cookie_auth = false;
 
     Ok(config)
 }
diff --git a/zebrad/tests/common/configs/v2.0.0-rc.0.toml b/zebrad/tests/common/configs/v2.0.0-rc.0.toml
index 70ba534e611..7f2276e63aa 100644
--- a/zebrad/tests/common/configs/v2.0.0-rc.0.toml
+++ b/zebrad/tests/common/configs/v2.0.0-rc.0.toml
@@ -63,6 +63,7 @@ peerset_initial_target_size = 25
 [rpc]
 cookie_dir = "cache_dir"
 debug_force_finished_sync = false
+enable_cookie_auth = true
 parallel_cpu_threads = 0
 
 [state]
diff --git a/zebrad/tests/common/get_block_template_rpcs/get_block_template.rs b/zebrad/tests/common/get_block_template_rpcs/get_block_template.rs
index 442c8d2dca4..b13c7f04236 100644
--- a/zebrad/tests/common/get_block_template_rpcs/get_block_template.rs
+++ b/zebrad/tests/common/get_block_template_rpcs/get_block_template.rs
@@ -16,15 +16,11 @@ use zebra_chain::{
     serialization::ZcashSerialize,
 };
 use zebra_node_services::rpc_client::RpcRequestClient;
-use zebra_rpc::{
-    config::Config as RpcConfig,
-    methods::get_block_template_rpcs::{
-        get_block_template::{
-            proposal::TimeSource, GetBlockTemplate, JsonParameters, ProposalResponse,
-        },
-        types::get_block_template::proposal_block_from_template,
+use zebra_rpc::methods::get_block_template_rpcs::{
+    get_block_template::{
+        proposal::TimeSource, GetBlockTemplate, JsonParameters, ProposalResponse,
     },
-    server::cookie,
+    types::get_block_template::proposal_block_from_template,
 };
 
 use crate::common::{
@@ -98,8 +94,7 @@ pub(crate) async fn run() -> Result<()> {
         true,
     )?;
 
-    let auth_cookie = cookie::get(RpcConfig::default().cookie_dir).expect("cookie should exist");
-    let client = RpcRequestClient::new(rpc_address, auth_cookie);
+    let client = RpcRequestClient::new(rpc_address);
 
     tracing::info!(
         "calling getblocktemplate RPC method at {rpc_address}, \
diff --git a/zebrad/tests/common/get_block_template_rpcs/get_peer_info.rs b/zebrad/tests/common/get_block_template_rpcs/get_peer_info.rs
index e745ef9cead..dd30954948c 100644
--- a/zebrad/tests/common/get_block_template_rpcs/get_peer_info.rs
+++ b/zebrad/tests/common/get_block_template_rpcs/get_peer_info.rs
@@ -4,10 +4,7 @@ use color_eyre::eyre::{eyre, Context, Result};
 
 use zebra_chain::parameters::Network;
 use zebra_node_services::rpc_client::RpcRequestClient;
-use zebra_rpc::{
-    config::Config as RpcConfig, methods::get_block_template_rpcs::types::peer_info::PeerInfo,
-    server::cookie,
-};
+use zebra_rpc::methods::get_block_template_rpcs::types::peer_info::PeerInfo;
 
 use crate::common::{
     launch::{can_spawn_zebrad_for_test_type, spawn_zebrad_for_rpc},
@@ -41,11 +38,8 @@ pub(crate) async fn run() -> Result<()> {
 
     tracing::info!(?rpc_address, "zebrad opened its RPC port",);
 
-    // Get the auth cookie
-    let auth_cookie = cookie::get(RpcConfig::default().cookie_dir).expect("cookie should exist");
-
     // call `getpeerinfo` RPC method
-    let peer_info_result: Vec<PeerInfo> = RpcRequestClient::new(rpc_address, auth_cookie)
+    let peer_info_result: Vec<PeerInfo> = RpcRequestClient::new(rpc_address)
         .json_result_from_call("getpeerinfo", "[]".to_string())
         .await
         .map_err(|err| eyre!(err))?;
diff --git a/zebrad/tests/common/get_block_template_rpcs/submit_block.rs b/zebrad/tests/common/get_block_template_rpcs/submit_block.rs
index e02227102ac..399efc8d99e 100644
--- a/zebrad/tests/common/get_block_template_rpcs/submit_block.rs
+++ b/zebrad/tests/common/get_block_template_rpcs/submit_block.rs
@@ -12,7 +12,6 @@ use color_eyre::eyre::{Context, Result};
 
 use zebra_chain::parameters::Network;
 use zebra_node_services::rpc_client::RpcRequestClient;
-use zebra_rpc::{config::Config as RpcConfig, server::cookie};
 
 use crate::common::{
     cached_state::get_raw_future_blocks,
@@ -64,10 +63,8 @@ pub(crate) async fn run() -> Result<()> {
 
     tracing::info!(?rpc_address, "zebrad opened its RPC port",);
 
-    let auth_cookie = cookie::get(RpcConfig::default().cookie_dir).expect("cookie should exist");
-
     // Create an http client
-    let client = RpcRequestClient::new(rpc_address, auth_cookie);
+    let client = RpcRequestClient::new(rpc_address);
 
     for raw_block in raw_blocks {
         let res = client
diff --git a/zebrad/tests/common/lightwalletd/sync.rs b/zebrad/tests/common/lightwalletd/sync.rs
index f9d3a72e027..8dce05a9150 100644
--- a/zebrad/tests/common/lightwalletd/sync.rs
+++ b/zebrad/tests/common/lightwalletd/sync.rs
@@ -9,7 +9,6 @@ use std::{
 use tempfile::TempDir;
 
 use zebra_node_services::rpc_client::RpcRequestClient;
-use zebra_rpc::{config::Config as RpcConfig, server::cookie};
 use zebra_test::prelude::*;
 
 use crate::common::{launch::ZebradTestDirExt, test_type::TestType};
@@ -205,9 +204,7 @@ pub fn are_zebrad_and_lightwalletd_tips_synced(
         let lightwalletd_tip_height = (lightwalletd_next_height - 1) as u64;
 
         // Get the block tip from zebrad
-        let auth_cookie =
-            cookie::get(RpcConfig::default().cookie_dir).expect("cookie should exist");
-        let client = RpcRequestClient::new(zebra_rpc_address, auth_cookie);
+        let client = RpcRequestClient::new(zebra_rpc_address);
         let zebrad_blockchain_info = client
             .text_from_call("getblockchaininfo", "[]".to_string())
             .await?;
diff --git a/zebrad/tests/common/regtest.rs b/zebrad/tests/common/regtest.rs
index fae5c57e7ab..bf1cba697de 100644
--- a/zebrad/tests/common/regtest.rs
+++ b/zebrad/tests/common/regtest.rs
@@ -17,7 +17,6 @@ use zebra_chain::{
 };
 use zebra_node_services::rpc_client::RpcRequestClient;
 use zebra_rpc::{
-    config::Config as RpcConfig,
     constants::MISSING_BLOCK_ERROR_CODE,
     methods::{
         get_block_template_rpcs::{
@@ -28,7 +27,7 @@ use zebra_rpc::{
         },
         hex_data::HexData,
     },
-    server::{cookie, OPENED_RPC_ENDPOINT_MSG},
+    server::OPENED_RPC_ENDPOINT_MSG,
 };
 use zebra_test::args;
 
@@ -74,8 +73,7 @@ pub(crate) async fn submit_blocks_test() -> Result<()> {
 
 /// Get block templates and submit blocks
 async fn submit_blocks(network: Network, rpc_address: SocketAddr) -> Result<()> {
-    let auth_cookie = cookie::get(RpcConfig::default().cookie_dir).expect("cookie should exist");
-    let client = RpcRequestClient::new(rpc_address, auth_cookie);
+    let client = RpcRequestClient::new(rpc_address);
 
     for _ in 1..=NUM_BLOCKS_TO_SUBMIT {
         let (mut block, height) = client