diff --git a/artio-core/src/test/java/uk/co/real_logic/artio/Timing.java b/artio-core/src/test/java/uk/co/real_logic/artio/Timing.java
index 4bb2f5989d..b5c5c49536 100644
--- a/artio-core/src/test/java/uk/co/real_logic/artio/Timing.java
+++ b/artio-core/src/test/java/uk/co/real_logic/artio/Timing.java
@@ -28,7 +28,7 @@
 public final class Timing
 {
     // Long timeout, but one that doesn't cause long overflow.
-    public static final long DEFAULT_TIMEOUT_IN_MS = isDebuggerAttached() ? Integer.MAX_VALUE : 30_000;
+    public static final long DEFAULT_TIMEOUT_IN_MS = isDebuggerAttached() ? Integer.MAX_VALUE : 29_000;
 
     public static <T> T withTimeout(final String message, final Supplier<Optional<T>> supplier, final long timeoutInMs)
     {