diff --git a/crates/shared/operations/infra/src/process_host_exec_tests.rs b/crates/shared/operations/infra/src/process_host_exec_tests.rs
index 82c76e4a..39c1997f 100644
--- a/crates/shared/operations/infra/src/process_host_exec_tests.rs
+++ b/crates/shared/operations/infra/src/process_host_exec_tests.rs
@@ -28,7 +28,7 @@ impl CommandExecutor for MockExecutor {
 }
 
 fn host() -> HostRecord {
-    HostRecord::new(HostId::new("dookie").unwrap(), HostEndpoint::Local)
+    HostRecord::new(HostId::new("devhost").unwrap(), HostEndpoint::Local)
 }
 
 fn request(command: HostExecCommand, args: Vec<String>) -> HostExecRequest {
diff --git a/crates/synapse/application/src/mutation_exec_result_tests.rs b/crates/synapse/application/src/mutation_exec_result_tests.rs
index 0284ce6b..756db5a9 100644
--- a/crates/synapse/application/src/mutation_exec_result_tests.rs
+++ b/crates/synapse/application/src/mutation_exec_result_tests.rs
@@ -3,7 +3,7 @@ use super::*;
 #[test]
 fn evidence_uris_preserve_execution_identity() {
     assert_eq!(
-        exec_evidence_uri("host-exec", "dookie", "rg"),
-        "host-exec://dookie/rg"
+        exec_evidence_uri("host-exec", "devhost", "rg"),
+        "host-exec://devhost/rg"
     );
 }
diff --git a/crates/synapse/application/src/mutation_exec_tests.rs b/crates/synapse/application/src/mutation_exec_tests.rs
index 83552562..e105ed1b 100644
--- a/crates/synapse/application/src/mutation_exec_tests.rs
+++ b/crates/synapse/application/src/mutation_exec_tests.rs
@@ -23,7 +23,7 @@ async fn container_exec_binds_argv_and_returns_canonical_output() {
     let runtime = runtime(container.clone(), hosts, true);
     let operation = op("container.exec");
     let parameters = json!({
-        "host":"dookie",
+        "host":"devhost",
         "container_id":"api",
         "command":["printf","ok"],
         "exec_workdir":"/app",
@@ -152,12 +152,12 @@ async fn execution_parameter_drift_rejects_before_driver_send() {
     let runtime = runtime(container.clone(), hosts, true);
     let operation = op("container.exec");
     let planned = json!({
-        "host":"dookie",
+        "host":"devhost",
         "container_id":"api",
         "command":["printf","ok"]
     });
     let changed = json!({
-        "host":"dookie",
+        "host":"devhost",
         "container_id":"api",
         "command":["printf","changed"]
     });
diff --git a/crates/synapse/application/tests/support/mutation_exec_support.rs b/crates/synapse/application/tests/support/mutation_exec_support.rs
index 6b6c0865..150b82a9 100644
--- a/crates/synapse/application/tests/support/mutation_exec_support.rs
+++ b/crates/synapse/application/tests/support/mutation_exec_support.rs
@@ -93,8 +93,8 @@ pub(crate) fn host(name: &str) -> HostRecord {
 
 pub(crate) fn container_receipt(exit_code: i64) -> ContainerExecReceipt {
     ContainerExecReceipt {
-        host: HostId::new("dookie").unwrap(),
-        topology_revision: host("dookie").revision().clone(),
+        host: HostId::new("devhost").unwrap(),
+        topology_revision: host("devhost").revision().clone(),
         container: "api".into(),
         command: vec!["printf".into(), "ok".into()],
         user: None,
@@ -114,7 +114,7 @@ pub(crate) fn runtime(
     enabled: bool,
 ) -> SynapseMutationRuntime {
     let snapshot =
-        TopologySnapshot::new([host("dookie"), host("alpha"), host("bad"), host("lost")]).unwrap();
+        TopologySnapshot::new([host("devhost"), host("alpha"), host("bad"), host("lost")]).unwrap();
     SynapseMutationRuntime::new(SynapseMutationPorts {
         hosts: Arc::new(StaticHosts(snapshot)),
         docker: Arc::new(UnusedLifecycle),