diff --git a/fleetd/src/test/java/dev/ltms/fleet/FleetdLeadMailboxSelectionTest.java b/fleetd/src/test/java/dev/ltms/fleet/FleetdLeadMailboxSelectionTest.java
index f681bfa..e4bfa2c 100644
--- a/fleetd/src/test/java/dev/ltms/fleet/FleetdLeadMailboxSelectionTest.java
+++ b/fleetd/src/test/java/dev/ltms/fleet/FleetdLeadMailboxSelectionTest.java
@@ -1,15 +1,12 @@
 package dev.ltms.fleet;
 
 import ch.qos.logback.classic.Level;
-import ch.qos.logback.classic.Logger;
 import ch.qos.logback.classic.spi.ILoggingEvent;
-import ch.qos.logback.core.read.ListAppender;
 import dev.ltms.fleet.config.FleetConfig;
 import dev.ltms.fleet.msg.LeadMailbox;
+import dev.ltms.fleet.testing.CapturedLog;
 import org.junit.jupiter.api.Test;
-import org.slf4j.LoggerFactory;
 
-import java.util.List;
 import java.util.Map;
 
 import static org.junit.jupiter.api.Assertions.*;
@@ -52,29 +49,22 @@ class FleetdLeadMailboxSelectionTest {
         }
     }
 
-    private static ListAppender<ILoggingEvent> captureFleetdLogs() {
-        Logger logger = (Logger) LoggerFactory.getLogger(Fleetd.class);
-        ListAppender<ILoggingEvent> appender = new ListAppender<>();
-        appender.start();
-        logger.addAppender(appender);
-        return appender;
-    }
-
-    private static String joined(ListAppender<ILoggingEvent> appender, Level level) {
-        return appender.list.stream().filter(e -> e.getLevel() == level)
+    private static String joined(CapturedLog captured, Level level) {
+        return captured.events().stream().filter(e -> e.getLevel() == level)
                 .map(ILoggingEvent::getFormattedMessage).reduce("", (a, b) -> a + "\n" + b);
     }
 
     @Test
     void noCoordinatorBlockLeavesTheFeatureOffSilently() {
-        var appender = captureFleetdLogs();
-        var opener = new RecordingOpener();
+        try (var captured = CapturedLog.of(Fleetd.class)) {
+            var opener = new RecordingOpener();
 
-        assertNull(Fleetd.openLeadMailbox(null, Map.of(), opener));
+            assertNull(Fleetd.openLeadMailbox(null, Map.of(), opener));
 
-        assertNull(opener.offeredUri, "nothing configured means nothing is opened");
-        assertEquals("", joined(appender, Level.WARN),
-                "an opt-in feature nobody asked for must not warn on every boot");
+            assertNull(opener.offeredUri, "nothing configured means nothing is opened");
+            assertEquals("", joined(captured, Level.WARN),
+                    "an opt-in feature nobody asked for must not warn on every boot");
+        }
     }
 
     @Test
@@ -114,31 +104,33 @@ class FleetdLeadMailboxSelectionTest {
 
     @Test
     void warnsAndStaysOffWhenSelfIdIsMissing() {
-        var appender = captureFleetdLogs();
-        var opener = new RecordingOpener();
-        var coordinator = new FleetConfig.Coordinator(RESOLVED_URI, null, null, null, null);
+        try (var captured = CapturedLog.of(Fleetd.class)) {
+            var opener = new RecordingOpener();
+            var coordinator = new FleetConfig.Coordinator(RESOLVED_URI, null, null, null, null);
 
-        assertNull(Fleetd.openLeadMailbox(coordinator, Map.of(), opener));
+            assertNull(Fleetd.openLeadMailbox(coordinator, Map.of(), opener));
 
-        assertNull(opener.offeredUri, "a mailbox with no owning coord-id has no queue to declare");
-        String warns = joined(appender, Level.WARN);
-        assertTrue(warns.contains("coordinator.selfId"), () -> "say which key is missing: " + warns);
-        assertFalse(warns.contains(SECRET), () -> "the URI's password must never be logged: " + warns);
+            assertNull(opener.offeredUri, "a mailbox with no owning coord-id has no queue to declare");
+            String warns = joined(captured, Level.WARN);
+            assertTrue(warns.contains("coordinator.selfId"), () -> "say which key is missing: " + warns);
+            assertFalse(warns.contains(SECRET), () -> "the URI's password must never be logged: " + warns);
+        }
     }
 
     @Test
     void warnsAndStaysOffWhenTheBrokerIsUnreachableAtBoot() {
-        var appender = captureFleetdLogs();
-        var opener = new RecordingOpener();
-        opener.unreachable = true;
-        var coordinator = new FleetConfig.Coordinator(RESOLVED_URI, null, "mac-opus", null, null);
+        try (var captured = CapturedLog.of(Fleetd.class)) {
+            var opener = new RecordingOpener();
+            opener.unreachable = true;
+            var coordinator = new FleetConfig.Coordinator(RESOLVED_URI, null, "mac-opus", null, null);
 
-        assertNull(Fleetd.openLeadMailbox(coordinator, Map.of(), opener),
-                "a down coordination broker turns the feature off; it must never take the daemon down");
+            assertNull(Fleetd.openLeadMailbox(coordinator, Map.of(), opener),
+                    "a down coordination broker turns the feature off; it must never take the daemon down");
 
-        String warns = joined(appender, Level.WARN);
-        assertTrue(warns.contains("coord.example"), () -> "name the host that failed: " + warns);
-        assertFalse(warns.contains(SECRET), () -> "with credentials stripped: " + warns);
-        assertTrue(warns.contains("Connection refused"), () -> "and the real reason: " + warns);
+            String warns = joined(captured, Level.WARN);
+            assertTrue(warns.contains("coord.example"), () -> "name the host that failed: " + warns);
+            assertFalse(warns.contains(SECRET), () -> "with credentials stripped: " + warns);
+            assertTrue(warns.contains("Connection refused"), () -> "and the real reason: " + warns);
+        }
     }
 }