diff --git a/src/host/audio_plan.rs b/src/host/audio_plan.rs
index e45d4a1..faf413c 100644
--- a/src/host/audio_plan.rs
+++ b/src/host/audio_plan.rs
@@ -1020,7 +1020,8 @@ mod tests {
     const PN_CHIP_FRAMES: usize = 24;
     const PN_SEQUENCE_CHIPS: usize = 4_096;
     const PN_WINDOW_CHIPS: usize = 1_024;
-    const PN_FILE_SECONDS: usize = 8;
+    const PN_FILE_SECONDS: usize = 12;
+    const PN_CAPTURE_SECONDS: u64 = 6;
     const PN_SKIP_FRAMES: usize = PN_SAMPLE_RATE / 2;
     const DESKTOP_PN_SEED: u64 = 0x1357_9bdf;
     const REMOTE_PN_SEED: u64 = 0x2468_ace1;
@@ -1630,30 +1631,36 @@ mod tests {
         Ok(errors)
     }
 
-    fn node_ids_named(names: &[&str]) -> Result<HashSet<u64>> {
-        let objects = pw_dump_objects("the Phase-9 xrun node set")?;
+    fn matching_node_ids(objects: &[serde_json::Value], names: &[&str]) -> Result<HashSet<u64>> {
         let wanted = names.iter().copied().collect::<HashSet<_>>();
+        let mut seen_names = HashSet::new();
         let found = objects
             .iter()
             .filter_map(|object| {
                 let name = object
                     .pointer("/info/props/node.name")
                     .and_then(serde_json::Value::as_str)?;
-                wanted
-                    .contains(name)
-                    .then(|| object.get("id").and_then(value_u64))?
+                if !wanted.contains(name) {
+                    return None;
+                }
+                let id = object.get("id").and_then(value_u64)?;
+                seen_names.insert(name);
+                Some(id)
             })
             .collect::<HashSet<_>>();
-        if found.len() != wanted.len() {
-            bail!(
-                "Phase-9 xrun snapshot resolved {} of {} required nodes ({names:?})",
-                found.len(),
-                wanted.len()
-            );
+        let mut missing = wanted.difference(&seen_names).copied().collect::<Vec<_>>();
+        if !missing.is_empty() {
+            missing.sort_unstable();
+            bail!("Phase-9 xrun snapshot did not resolve required node names: {missing:?}");
         }
         Ok(found)
     }
 
+    fn node_ids_named(names: &[&str]) -> Result<HashSet<u64>> {
+        let objects = pw_dump_objects("the Phase-9 xrun node set")?;
+        matching_node_ids(&objects, names)
+    }
+
     fn xrun_delta(
         before: &HashMap<u64, u64>,
         after: &HashMap<u64, u64>,
@@ -1671,7 +1678,11 @@ mod tests {
             .sum()
     }
 
-    async fn record_capture(monitor_name: &str, label: &str) -> Result<Vec<u8>> {
+    async fn record_capture_for(
+        monitor_name: &str,
+        label: &str,
+        duration: Duration,
+    ) -> Result<Vec<u8>> {
         let raw = RawCaptureFile::new(label);
         let output_file =
             std::fs::File::create(&raw.0).with_context(|| format!("create {}", raw.0.display()))?;
@@ -1690,12 +1701,16 @@ mod tests {
             .stdout(Stdio::from(output_file))
             .stderr(Stdio::piped());
         let mut recorder = ContainedProcess::spawn(&mut command, "Phase-6 parec recorder")?;
-        tokio::time::sleep(Duration::from_secs(3)).await;
+        tokio::time::sleep(duration).await;
         recorder.ensure_running()?;
         recorder.stop()?;
         std::fs::read(&raw.0).with_context(|| format!("read {}", raw.0.display()))
     }
 
+    async fn record_capture(monitor_name: &str, label: &str) -> Result<Vec<u8>> {
+        record_capture_for(monitor_name, label, Duration::from_secs(3)).await
+    }
+
     fn tone_dbfs(raw: &[u8], frequency: f64) -> Result<f64> {
         const SAMPLE_RATE: f64 = 48_000.0;
         const CHANNELS: usize = 2;
@@ -1935,7 +1950,12 @@ mod tests {
         }
         let relevant_xrun_nodes = node_ids_named(&xrun_names)?;
         let xruns_before = pw_top_errors()?;
-        let raw = record_capture(&monitor_name, &format!("phase9-{}", arm.label)).await?;
+        let raw = record_capture_for(
+            &monitor_name,
+            &format!("phase9-{}", arm.label),
+            Duration::from_secs(PN_CAPTURE_SECONDS),
+        )
+        .await?;
         let xruns_after = pw_top_errors()?;
 
         // Original routes must still be intact after the measurement, not only
@@ -2014,6 +2034,28 @@ mod tests {
         assert!(max_cyclic_correlation(&vec![0.0; PN_WINDOW_CHIPS], &desktop) == 0.0);
     }
 
+    #[test]
+    fn phase9_xrun_node_resolution_accepts_duplicate_names_but_not_missing_names() {
+        let objects = serde_json::json!([
+            {"id": 11, "info": {"props": {"node.name": "controlled"}}},
+            {"id": 12, "info": {"props": {"node.name": "controlled"}}},
+            {"id": 13, "info": {"props": {"node.name": "playback"}}},
+            {"id": 14, "info": {"props": {"node.name": "unrelated"}}}
+        ]);
+        let objects = objects.as_array().expect("fixture is an array");
+        assert_eq!(
+            matching_node_ids(objects, &["controlled", "playback"])
+                .expect("all required names are represented"),
+            HashSet::from([11, 12, 13])
+        );
+        assert!(
+            matching_node_ids(objects, &["controlled", "missing"])
+                .unwrap_err()
+                .to_string()
+                .contains("missing")
+        );
+    }
+
     /// Phase-9 rig upgrade: the Phase-6 production-path topology is driven by
     /// two pinned, independently generated PN probes. Every non-overlapping
     /// half-second window is normalized and correlated separately on left and