diff --git a/Code/test/tests/driver.rs b/Code/test/tests/driver.rs
index eeef9355b..93d4006ba 100644
--- a/Code/test/tests/driver.rs
+++ b/Code/test/tests/driver.rs
@@ -272,7 +272,6 @@ fn driver_steps_proposer() {
 #[test]
 fn driver_steps_not_proposer_valid() {
     let value = Value::new(9999);
-    let value_id = value.id();
 
     let sel = RotateProposer::default();
     let env = TestEnv::new(move |_, _| Some(value));
@@ -320,7 +319,7 @@ fn driver_steps_not_proposer_valid() {
             desc: "Receive a proposal, prevote for it (v2)",
             input_event: Some(Event::Proposal(proposal.clone(), Validity::Valid)),
             expected_output: Some(Message::Vote(
-                Vote::new_prevote(Height::new(1), Round::new(0), Some(value_id), my_addr)
+                Vote::new_prevote(Height::new(1), Round::new(0), Some(value.id()), my_addr)
                     .signed(&my_sk),
             )),
             expected_round: Round::new(0),
@@ -350,7 +349,7 @@ fn driver_steps_not_proposer_valid() {
         TestStep {
             desc: "v1 prevotes for its own proposal",
             input_event: Some(Event::Vote(
-                Vote::new_prevote(Height::new(1), Round::new(0), Some(value_id), addr1)
+                Vote::new_prevote(Height::new(1), Round::new(0), Some(value.id()), addr1)
                     .signed(&sk1),
             )),
             expected_output: None,
@@ -367,11 +366,11 @@ fn driver_steps_not_proposer_valid() {
         TestStep {
             desc: "v3 prevotes for v1's proposal, it gets +2/3 prevotes, precommit for it (v2)",
             input_event: Some(Event::Vote(
-                Vote::new_prevote(Height::new(1), Round::new(0), Some(value_id), addr3)
+                Vote::new_prevote(Height::new(1), Round::new(0), Some(value.id()), addr3)
                     .signed(&sk3),
             )),
             expected_output: Some(Message::Vote(
-                Vote::new_precommit(Height::new(1), Round::new(0), Some(value_id), my_addr)
+                Vote::new_precommit(Height::new(1), Round::new(0), Some(value.id()), my_addr)
                     .signed(&my_sk),
             )),
             expected_round: Round::new(0),
@@ -413,7 +412,7 @@ fn driver_steps_not_proposer_valid() {
         TestStep {
             desc: "v1 precommits its proposal",
             input_event: Some(Event::Vote(
-                Vote::new_precommit(Height::new(1), Round::new(0), Some(value_id), addr1)
+                Vote::new_precommit(Height::new(1), Round::new(0), Some(value.id()), addr1)
                     .signed(&sk1),
             )),
             expected_output: None,
@@ -436,7 +435,7 @@ fn driver_steps_not_proposer_valid() {
         TestStep {
             desc: "v3 precommits for v1's proposal, it gets +2/3 precommits, decide it",
             input_event: Some(Event::Vote(
-                Vote::new_precommit(Height::new(1), Round::new(0), Some(value_id), addr3)
+                Vote::new_precommit(Height::new(1), Round::new(0), Some(value.id()), addr3)
                     .signed(&sk3),
             )),
             expected_output: Some(Message::Decide(Round::new(0), value)),
@@ -484,7 +483,6 @@ fn driver_steps_not_proposer_valid() {
 #[test]
 fn driver_steps_not_proposer_invalid() {
     let value = Value::new(9999);
-    let value_id = value.id();
 
     let sel = RotateProposer::default();
     let env = TestEnv::new(move |_, _| Some(value));
@@ -561,7 +559,7 @@ fn driver_steps_not_proposer_invalid() {
         TestStep {
             desc: "v1 prevotes for its own proposal",
             input_event: Some(Event::Vote(
-                Vote::new_prevote(Height::new(1), Round::new(0), Some(value_id), addr1).signed(&sk1),
+                Vote::new_prevote(Height::new(1), Round::new(0), Some(value.id()), addr1).signed(&sk1),
             )),
             expected_output: None,
             expected_round: Round::new(0),
@@ -577,7 +575,7 @@ fn driver_steps_not_proposer_invalid() {
         TestStep {
             desc: "v3 prevotes for v1's proposal, we have polka for any, schedule prevote timeout (v2)",
             input_event: Some(Event::Vote(
-                Vote::new_prevote(Height::new(1), Round::new(0), Some(value_id), addr3).signed(&sk3),
+                Vote::new_prevote(Height::new(1), Round::new(0), Some(value.id()), addr3).signed(&sk3),
             )),
             expected_output: Some(Message::ScheduleTimeout(Timeout::prevote(Round::new(0)))),
             expected_round: Round::new(0),
@@ -634,7 +632,6 @@ fn driver_steps_not_proposer_invalid() {
 #[test]
 fn driver_steps_not_proposer_timeout_multiple_rounds() {
     let value = Value::new(9999);
-    let value_id = value.id();
 
     let sel = RotateProposer::default();
     let env = TestEnv::new(move |_, _| Some(value));
@@ -713,7 +710,7 @@ fn driver_steps_not_proposer_timeout_multiple_rounds() {
         TestStep {
             desc: "v1 prevotes for its own proposal",
             input_event: Some(Event::Vote(
-                Vote::new_prevote(Height::new(1), Round::new(0), Some(value_id), addr1)
+                Vote::new_prevote(Height::new(1), Round::new(0), Some(value.id()), addr1)
                     .signed(&sk1),
             )),
             expected_output: None,
@@ -765,7 +762,7 @@ fn driver_steps_not_proposer_timeout_multiple_rounds() {
         TestStep {
             desc: "v1 precommits its proposal",
             input_event: Some(Event::Vote(
-                Vote::new_precommit(Height::new(1), Round::new(0), Some(value_id), addr1)
+                Vote::new_precommit(Height::new(1), Round::new(0), Some(value.id()), addr1)
                     .signed(&sk1),
             )),
             expected_output: None,