diff --git a/crates/sui-graphql-rpc/src/test_infra/cluster.rs b/crates/sui-graphql-rpc/src/test_infra/cluster.rs
index 6469144784b0c..e6ffb9dad733d 100644
--- a/crates/sui-graphql-rpc/src/test_infra/cluster.rs
+++ b/crates/sui-graphql-rpc/src/test_infra/cluster.rs
@@ -32,7 +32,9 @@ use tokio_util::sync::CancellationToken;
 use tracing::info;
 
 const VALIDATOR_COUNT: usize = 4;
-const EPOCH_DURATION_MS: u64 = 10000;
+/// Set default epoch duration to 300s. This high value is to turn the TestCluster into a lockstep
+/// network of sorts. Tests should call `trigger_reconfiguration` to advance the network's epoch.
+const EPOCH_DURATION_MS: u64 = 300_000;
 
 const ACCOUNT_NUM: usize = 20;
 const GAS_OBJECT_COUNT: usize = 3;
diff --git a/crates/sui-graphql-rpc/tests/e2e_tests.rs b/crates/sui-graphql-rpc/tests/e2e_tests.rs
index 7f4321f59594c..368752f0d1e0e 100644
--- a/crates/sui-graphql-rpc/tests/e2e_tests.rs
+++ b/crates/sui-graphql-rpc/tests/e2e_tests.rs
@@ -391,6 +391,7 @@ async fn test_zklogin_sig_verify() {
     let cluster = start_cluster(ServiceConfig::test_defaults()).await;
 
     let test_cluster = &cluster.network.validator_fullnode_handle;
+    test_cluster.trigger_reconfiguration().await;
     test_cluster.wait_for_epoch_all_nodes(1).await;
     test_cluster.wait_for_authenticator_state_update().await;
 
diff --git a/crates/sui-mvr-graphql-rpc/src/test_infra/cluster.rs b/crates/sui-mvr-graphql-rpc/src/test_infra/cluster.rs
index c543acf71d4aa..14636927a7f4a 100644
--- a/crates/sui-mvr-graphql-rpc/src/test_infra/cluster.rs
+++ b/crates/sui-mvr-graphql-rpc/src/test_infra/cluster.rs
@@ -32,7 +32,9 @@ use tokio_util::sync::CancellationToken;
 use tracing::info;
 
 const VALIDATOR_COUNT: usize = 4;
-const EPOCH_DURATION_MS: u64 = 10000;
+/// Set default epoch duration to 300s. This high value is to turn the TestCluster into a lockstep
+/// network of sorts. Tests should call `trigger_reconfiguration` to advance the network's epoch.
+const EPOCH_DURATION_MS: u64 = 300_000;
 
 const ACCOUNT_NUM: usize = 20;
 const GAS_OBJECT_COUNT: usize = 3;
diff --git a/crates/sui-mvr-graphql-rpc/tests/e2e_tests.rs b/crates/sui-mvr-graphql-rpc/tests/e2e_tests.rs
index db62c72faa1ce..3b53fa2108ac7 100644
--- a/crates/sui-mvr-graphql-rpc/tests/e2e_tests.rs
+++ b/crates/sui-mvr-graphql-rpc/tests/e2e_tests.rs
@@ -290,6 +290,7 @@ async fn test_zklogin_sig_verify() {
     let cluster = start_cluster(ServiceConfig::test_defaults()).await;
 
     let test_cluster = &cluster.network.validator_fullnode_handle;
+    test_cluster.trigger_reconfiguration().await;
     test_cluster.wait_for_epoch_all_nodes(1).await;
     test_cluster.wait_for_authenticator_state_update().await;