diff --git a/crates/tasks-admission/src/decide_tests.rs b/crates/tasks-admission/src/decide_tests.rs
index ea17636..aaf74dc 100644
--- a/crates/tasks-admission/src/decide_tests.rs
+++ b/crates/tasks-admission/src/decide_tests.rs
@@ -220,7 +220,7 @@ fn devices_are_exclusive_and_skip_pressure_r035() {
     let mut i = input(1, vec![]);
     i.pressure.cpu = Some(100.0);
     i.available_memory = 0;
-    let id = DeviceId("9BWAY1LSDC".into());
+    let id = DeviceId("PHONE00001".into());
     i.devices.insert(
         id.clone(),
         DeviceState {
@@ -243,11 +243,11 @@ fn devices_are_exclusive_and_skip_pressure_r035() {
             lane: Lane::Normal
         }
     );
-    assert_eq!(text(&v[&2]), "device 9BWAY1LSDC held by #1");
+    assert_eq!(text(&v[&2]), "device PHONE00001 held by #1");
     i.devices.get_mut(&id).unwrap().free = false;
     i.devices.get_mut(&id).unwrap().holder = Some(JobId(77));
     i.waiters = vec![dev(3, 1)];
-    assert_eq!(text(&verdicts(&i)[&3]), "device 9BWAY1LSDC held by #77");
+    assert_eq!(text(&verdicts(&i)[&3]), "device PHONE00001 held by #77");
     i.waiters = vec![waiter(4, SlotKind::Device, 1)];
     assert_eq!(text(&verdicts(&i)[&4]), "device job names no device");
 }
diff --git a/crates/tasks-cli/src/args/tests.rs b/crates/tasks-cli/src/args/tests.rs
index f6fc852..88cac06 100644
--- a/crates/tasks-cli/src/args/tests.rs
+++ b/crates/tasks-cli/src/args/tests.rs
@@ -112,11 +112,11 @@ fn r190_a_device_with_a_remote_placement_names_the_conflict_and_the_fix() {
         peer: Some("nixos".into()),
         ..PlaceArgs::default()
     };
-    let CliError::Usage(m) = p.placement(Some("9BWAY1LSDC")).unwrap_err() else {
+    let CliError::Usage(m) = p.placement(Some("PHONE00001")).unwrap_err() else {
         panic!("usage expected")
     };
     assert!(
-        m.contains("--device 9BWAY1LSDC and --peer NAME conflict"),
+        m.contains("--device PHONE00001 and --peer NAME conflict"),
         "{m}"
     );
     assert!(
diff --git a/crates/tasks-cli/src/commands/tests.rs b/crates/tasks-cli/src/commands/tests.rs
index 27cda4d..d8191d0 100644
--- a/crates/tasks-cli/src/commands/tests.rs
+++ b/crates/tasks-cli/src/commands/tests.rs
@@ -673,11 +673,11 @@ fn a_device_job_carries_the_serial_and_the_device_kind() {
         &[
             "enqueue",
             "--device",
-            "9BWAY1LSDC",
+            "PHONE00001",
             "--",
             "adb",
             "-s",
-            "9BWAY1LSDC",
+            "PHONE00001",
             "devices",
         ],
     );
@@ -692,7 +692,7 @@ fn a_device_job_carries_the_serial_and_the_device_kind() {
     assert_eq!(spec.kind, Kind::Device);
     assert_eq!(
         spec.requirements.device,
-        Some(DeviceId("9BWAY1LSDC".into()))
+        Some(DeviceId("PHONE00001".into()))
     );
 }
 
diff --git a/crates/tasks-daemon/src/follow_tests.rs b/crates/tasks-daemon/src/follow_tests.rs
index 507cac1..65347ee 100644
--- a/crates/tasks-daemon/src/follow_tests.rs
+++ b/crates/tasks-daemon/src/follow_tests.rs
@@ -494,7 +494,7 @@ fn r210_a_denied_serial_is_refused_in_argv_in_any_case_and_as_a_device_resource(
     by_resource.requirements.device = Some(tasks_core::DeviceId("PHONE01X".into()));
     assert_eq!(err(submit(&r, by_resource)).code, ErrorCode::Refused);
     let mut fine = r.spec("o", &["adb", "devices"], Kind::Device);
-    fine.requirements.device = Some(tasks_core::DeviceId("9BWAY1LSDC".into()));
+    fine.requirements.device = Some(tasks_core::DeviceId("PHONE00001".into()));
     assert!(matches!(ok(submit(&r, fine)), Response::Submitted { .. }));
 }
 
diff --git a/crates/tasks-mcp/tests/tools.rs b/crates/tasks-mcp/tests/tools.rs
index 848b276..18cac97 100644
--- a/crates/tasks-mcp/tests/tools.rs
+++ b/crates/tasks-mcp/tests/tools.rs
@@ -187,14 +187,14 @@ fn a_device_job_holds_a_device_slot() {
     let r = call(
         &tools_with(&d),
         "submit",
-        json!({"argv": ["adb", "-s", "9BWAY1LSDC", "shell"], "device": "9BWAY1LSDC"}),
+        json!({"argv": ["adb", "-s", "PHONE00001", "shell"], "device": "PHONE00001"}),
     );
     assert!(!r.is_error, "{}", r.text);
     let s = &submits(&d)[0];
     assert_eq!(s.kind, Kind::Device);
     assert_eq!(
         s.requirements.device.as_ref().map(|d| d.0.as_str()),
-        Some("9BWAY1LSDC")
+        Some("PHONE00001")
     );
 }