diff --git a/core/src/cluster_tests.rs b/core/src/cluster_tests.rs
index 8ad0ca716d..389d9a18f3 100644
--- a/core/src/cluster_tests.rs
+++ b/core/src/cluster_tests.rs
@@ -119,21 +119,21 @@ pub fn verify_ledger_ticks(ledger_path: &str, ticks_per_slot: usize) {
 }
 
 pub fn sleep_n_epochs(
-    num_epochs: u64,
+    num_epochs: f64,
     config: &PohServiceConfig,
     ticks_per_slot: u64,
     slots_per_epoch: u64,
 ) {
     let num_ticks_per_second = {
         match config {
-            PohServiceConfig::Sleep(d) => (1000 / d.as_millis()) as u64,
+            PohServiceConfig::Sleep(d) => (1000 / d.as_millis()) as f64,
             _ => panic!("Unsuppported tick config for testing"),
         }
     };
 
-    let num_ticks_to_sleep = num_epochs * ticks_per_slot * slots_per_epoch;
+    let num_ticks_to_sleep = num_epochs * ticks_per_slot as f64 * slots_per_epoch as f64;
     sleep(Duration::from_secs(
-        (num_ticks_to_sleep + num_ticks_per_second - 1) / num_ticks_per_second,
+        ((num_ticks_to_sleep + num_ticks_per_second - 1.0) / num_ticks_per_second) as u64,
     ));
 }
 
diff --git a/tests/local_cluster.rs b/tests/local_cluster.rs
index bf5cdeaf69..75079b85f9 100644
--- a/tests/local_cluster.rs
+++ b/tests/local_cluster.rs
@@ -111,7 +111,7 @@ fn test_two_unbalanced_stakes() {
         num_slots_per_epoch,
     );
     cluster_tests::sleep_n_epochs(
-        10,
+        10.0,
         &fullnode_config.tick_config,
         num_ticks_per_slot,
         num_slots_per_epoch,
@@ -154,14 +154,14 @@ fn test_restart_node() {
     );
     let nodes = cluster.get_node_ids();
     cluster_tests::sleep_n_epochs(
-        1,
+        1.0,
         &fullnode_config.tick_config,
         timing::DEFAULT_TICKS_PER_SLOT,
         slots_per_epoch,
     );
     cluster.restart_node(nodes[0]);
     cluster_tests::sleep_n_epochs(
-        1,
+        0.5,
         &fullnode_config.tick_config,
         timing::DEFAULT_TICKS_PER_SLOT,
         slots_per_epoch,