diff --git a/core/src/test/java/io/questdb/client/test/cutlass/qwp/client/ServerErrorAckTerminalTest.java b/core/src/test/java/io/questdb/client/test/cutlass/qwp/client/ServerErrorAckTerminalTest.java
index 13998096..fdc9c90d 100644
--- a/core/src/test/java/io/questdb/client/test/cutlass/qwp/client/ServerErrorAckTerminalTest.java
+++ b/core/src/test/java/io/questdb/client/test/cutlass/qwp/client/ServerErrorAckTerminalTest.java
@@ -78,7 +78,12 @@ public void testServerErrorAckIsTerminalAndDoesNotBurnReconnectBudget() throws E
             Sender sender = Sender.fromConfig(cfg);
             try {
                 sender.table("foo").longColumn("v", 1L).atNow();
-                sender.flush();
+                try {
+                    sender.flush();
+                } catch (LineSenderException ignored) {
+                    // The error ACK may arrive before flush() checks for errors.
+                    // The terminal error is sticky; the next call must still throw.
+                }
 
                 // Wait for the server to actually receive the batch and
                 // for the error-ACK round-trip to complete.